Sqlite-gui: еще один редактор sqlite для windows
Содержание:
- Building for node-webkit
- 5 последних уроков рубрики «Разное»
- What it is
- Создание таблицы
- 4.1. Other command-line tools
- 5. Managing SQLite Archives From Application Code
- 14.2. SQLite Archive Extract Command
- Releases
- SQLite Release 3.9.2 On 2015-11-02
- About The SQLite Team
- Основные запросы SQLite
- 7.6. Export to CSV
- 8. Accessing ZIP Archives As Database Files
- 7.2. Reading SQL from a file
- Исключения SQLite3
- SQLite3 manager LITE
- Compiling for Unix-like systems
- History
- Source install
- Linux
- 14.4. SQLite Archive Insert And Update Commands
- Using MSVC for Windows systems
- Further Information
- Version Control
- Packaging and Building
- Создание базы данных
- SQLite Studio – Manager and Administration
- SQLite Expert Professional управление базами данных 5.3.5.476 RePack (& Portable) by elchupacabra
- Заключение
Building for node-webkit
Because of ABI differences, must be built in a custom to be used with node-webkit.
To build node-sqlite3 for node-webkit:
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Install globally: (unless already installed)
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Build the module with the custom flags of , , and :
NODE_WEBKIT_VERSION="0.8.6" # see latest version at https://github.com/rogerwang/node-webkit#downloads npm install sqlite3 --build-from-source --runtime=node-webkit --target_arch=ia32 --target=$(NODE_WEBKIT_VERSION)
This command internally calls out to which itself calls out to when the option is passed.
You can also run this command from within a checkout:
npm install --build-from-source --runtime=node-webkit --target_arch=ia32 --target=$(NODE_WEBKIT_VERSION)
Remember the following:
-
You must provide the right flag. is needed to target 32bit node-webkit builds, while will target 64bit node-webkit builds (if available for your platform).
-
After the package is built for node-webkit it cannot run in the vanilla Node.js (and vice versa).
For example, npm test of the node-webkit’s package would fail.
Visit the “Using Node modules” article in the node-webkit’s wiki for more details.
5 последних уроков рубрики «Разное»
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Выбрать хороший хостинг для своего сайта достаточно сложная задача. Особенно сейчас, когда на рынке услуг хостинга действует несколько сотен игроков с очень привлекательными предложениями. Хорошим вариантом является лидер рейтинга Хостинг Ниндзя — Макхост.
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Как разместить свой сайт на хостинге? Правильно выбранный хороший хостинг — это будущее Ваших сайтов
Проект готов, Все проверено на локальном сервере OpenServer и можно переносить сайт на хостинг. Вот только какую компанию выбрать? Предлагаю рассмотреть хостинг fornex.com. Отличное место для твоего проекта с перспективами бурного роста.
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Создание вебсайта — процесс трудоёмкий, требующий слаженного взаимодействия между заказчиком и исполнителем, а также между всеми членами коллектива, вовлечёнными в проект. И в этом очень хорошее подспорье окажет онлайн платформа Wrike.
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Подборка из нескольких десятков ресурсов для создания мокапов и прототипов.
What it is
DB Browser for SQLite (DB4S) is a high quality, visual, open source tool to
create, design, and edit database files compatible with SQLite.
DB4S is for users and developers who want to create, search, and edit
databases. DB4S uses a familiar spreadsheet-like interface, and complicated SQL commands do not have to be learned.
Controls and wizards are available for users to:
- Create and compact database files
- Create, define, modify and delete tables
- Create, define, and delete indexes
- Browse, edit, add, and delete records
- Search records
- Import and export records as text
- Import and export tables from/to CSV files
- Import and export databases from/to SQL dump files
- Issue SQL queries and inspect the results
- Examine a log of all SQL commands issued by the application
- Plot simple graphs based on table or query data
Создание таблицы
Чтобы создать таблицу в SQLite3, выполним запрос Create Table в методе execute(). Для этого выполним следующую последовательность шагов:
- Создание объекта подключения
- Объект Cursor создается с использованием объекта подключения
- Используя объект курсора, вызывается метод execute с запросом create table в качестве параметра.
Давайте создадим таблицу Employees со следующими колонками:
Код будет таким:
В приведенном выше коде определено две функции: первая устанавливает соединение; а вторая — используя объект курсора выполняет SQL оператор create table.
Метод commit() сохраняет все сделанные изменения. В конце скрипта производится вызов обеих функций.
Для проверки существования таблицы воспользуемся браузером БД для sqlite.
4.1. Other command-line tools
Just as there is the «zip» program to manage ZIP Archives, and the
«tar» program to manage Tarballs, the
«sqlar» program exists to manage SQL Archives.
The «sqlar» program is able to create a new SQLite Archive, list the
content of an existing archive, add or remove files from the archive,
and/or extract files from the archive.
A separate «sqlarfs» program is able to mount the SQLite Archive as
a Fuse Filesystem.
5. Managing SQLite Archives From Application Code
Applications can easily read or write SQLite Archives by linking against
SQLite and including the
ext/misc/sqlar.c extension
to handle the compression and decompression. The sqlar.c extension
creates two new SQL functions.
- sqlar_compress(X)
-
The sqlar_compress(X) function attempts to compress a copy of the
string or blob X using the Default algorithm and
returns the result as a blob. If the input X is incompressible, then
a copy of X is returned. This routine is used when inserting content
into an SQLite Archive. - sqlar_uncompress(Y,SZ)
-
The sqlar_uncompress(Y,SZ) function will undo the compression accomplished
by sqlar_compress(X). The Y parameter is the compressed content (the output
from a prior call to sqlar_compress()) and SZ is the original uncompressed
size of the input X that generated Y. If SZ is less than or equal to the
size of Y, that indicates that no compression occurred, and so
sqlar_uncompress(Y,SZ) returns a copy of Y. Otherwise, sqlar_uncompress(Y,SZ)
runs the Inflate algorithm on Y to uncompress it and restore it to its
original form and returns the uncompressed content.
This routine is used when extracting content from an SQLite Archive.
Using the two routines above, it is simple for applications to insert
new records into or extract existing records from an SQLite Archive.
Insert a new into an SQLite Archive using code like this:
INSERT INTO sqlar(name,mode,mtime,sz,data) VALUES ($name,$mode,strftime('%s',$mtime), length($content),sqlar_compress($content));
Extract an entry from the SQLite Archive using code like this:
SELECT name, mode, datetime(mtime,'unixepoch'), sqlar_uncompress(data,sz) FROM sqlar WHERE ...;
The code above is for the general case. For the special case of an
SQLite Archive that only stores uncompressed or uncompressible content
(this might come up, for example, in an SQLite Archive that stores only
JPEG, GIF, and/or PNG images) then the content can be inserted into
and extracted from the database without using the sqlar_compress()
and sqlar_uncompress() functions, and the sqlar.c extension is not
required.
14.2. SQLite Archive Extract Command
Extract files from the archive (either to the current working directory or
to the directory specified by a —directory option). If there are no arguments
following the options all files are extracted from the archive. Or, if there
are arguments, they are the names of files to extract from the archive. Any
specified directories are extracted recursively. It is an error if any
specified files are not part of the archive.
-- Extract all files from the archive in the current "main" db to the -- current working directory. List files as they are extracted. .ar --extract --verbose -- Extract file "file1" from archive "ar.db" to directory "dir1". .ar fCx ar.db dir1 file1
Releases
- Version 3.12.2 released — 2021-05-18
- Version 3.12.1 released — 2020-11-09
- Version 3.12.0 released — 2020-06-16
- Version 3.11.2 released — 2019-04-03
- Version 3.11.1 released — 2019-02-18
- Version 3.11.0 released — 2019-02-07
- Version 3.10.1 released — 2017-09-20
- Version 3.10.0 released — 2017-08-20
- Version 3.9.1 released — 2016-10-03
- Version 3.9.0 released — 2016-08-24
- Version 3.8.0 released — 2015-12-25
- Version 3.7.0 released — 2015-06-14
- Version 3.6.0 released — 2015-04-27
- Version 3.5.1 released — 2015-02-08
- Version 3.5.0 released — 2015-01-31
- Version 3.4.0 released — 2014-10-29
- Version 3.3.1 released — 2014-08-31 — Project renamed from «SQLite Database Browser»
- Version 3.3.0 released — 2014-08-24
- Version 3.2.0 released — 2014-07-06
- Version 3.1.0 released — 2014-05-17
- Version 3.0.3 released — 2014-04-28
- Version 3.0.2 released — 2014-02-12
- Version 3.0.1 released — 2013-12-02
- Version 3.0 released — 2013-09-15
- Version 3.0rc1 released — 2013-09-09 — Project now on GitHub
- Version 2.0b1 released — 2009-12-10 — Based on Qt4.6
- Version 1.2 released — 2005-04-05
- Version 1.1 released — 2004-07-20
- Version 1.01 released — 2003-10-02
- Version 1.0 released to public domain — 2003-08-19
SQLite Release 3.9.2 On 2015-11-02
Changes in version 3.9.0 (2015-10-14):
Policy Changes:
The version numbering conventions for SQLite are revised to use the
emerging standard of semantic versioning.
New Features And Enhancements:
Added the json1 extension module in the source tree, and in the amalgamation.
Enable support using the compile-time option.
Added Full Text Search version 5 (FTS5) to the amalgamation, enabled
using . FTS5 will be considered «experimental» (subject
to incompatible changes) for at least one more release cycle.
The CREATE VIEW statement now accepts an optional list of
column names following the view name.
Added support for indexes on expressions.
Added support for in the FROM clause of a
SELECT statement.
Added support for .
A VIEW may now reference undefined tables and functions when
initially created. Missing tables and functions are reported when
the VIEW is used in a query.
Added the sqlite3_value_subtype() and sqlite3_result_subtype()
interfaced (used by the json1 extension).
The query planner is now able to use partial indexes that contain
AND-connected terms in the WHERE clause.
The sqlite3_analyzer.exe utility is updated to report the depth of
each btree and to show the average fanout for indexes and
WITHOUT ROWID tables.
Enhanced the dbstat virtual table so that it can be used as a
where the argument is the schema to be
analyzed.
Other changes:
The sqlite3_memory_alarm() interface, which has been deprecated and
undocumented for 8 years, is changed into a no-op.
Important fixes:
Fixed a critical bug in the
SQLite Encryption Extension that
could cause the database to become unreadable and unrecoverable if a VACUUM command
changed the size of the encryption nonce.
Added a memory barrier in the implementation of
sqlite3_initialize() to help ensure that it is thread-safe.
Fix the so that it always ignores subplans that
do not use an index.
Do not apply the WHERE-clause pushdown optimization on terms that originate
in the ON or USING clause of a LEFT JOIN. Fix for ticket
c2a19d81652f40568c.
Additional changes in version 3.9.1 (2015-10-16):
- Fix the json1 extension so that it does not recognize ASCII form-feed as a
whitespace character, in order to comply with RFC-7159. Fix for ticket
57eec374ae1d0a1d -
Add a few #ifdef and build script changes to address compilation issues that
appeared after the 3.9.0 release.
Additional changes in version 3.9.2 (2015-11-02):
- Fix the schema parser so that it interprets certain
(obscure and ill-formed)
CREATE TABLE statements the same as legacy. Fix for ticket
ac661962a2aeab3c331 -
Fix a query planner problem that could result in an incorrect
answer due to the use of in subqueries in
the FROM clause of a correlated scalar subqueries. Fix for ticket
8a2adec1. - SQLITE_SOURCE_ID: «2015-11-02 18:31:45 bda77dda9697c463c3d0704014d51627fceee328»
-
SHA1 for sqlite3.c: 1c4013876f50bbaa3e6f0f98e0147c76287684c1
A complete list of SQLite releases
in a single page and a chronology are both also available.
A detailed history of every
check-in is available at
SQLite version control site.
About The SQLite Team
Paid support options and products are provided by
Hipp, Wyrick & Company, Inc., (Hwaci), a
Georgia
corporation
with headquarters in
Charlotte, North Carolina and has been in business since
1992.
Hwaci has an international team of
employees and associates representing the best available talent.
We are a 100% engineering company. There is
no sales staff.
Our goal is to provide outstanding service and honest advice
without spin or sales-talk.
Hwaci is a small company but it is
also closely held and debt-free and has low
fixed costs, which means that it is largely immune to buy-outs,
take-overs, and market down-turns. Hwaci intends to
continue operating in its current form, and at roughly its current
size until at least the year 2050.
We expect to be here when you need us,
even if that need is many years in the future.
Основные запросы SQLite
Запросы в SQLite очень похожи на те, которые вы используете в других базах данных, таких как MySQL или Postgres. Мы просто используем обычный синтаксис SQL для выполнения запросов, после чего объект cursor выполняет SQL. Вот несколько примеров:
Python
import sqlite3
conn = sqlite3.connect(«mydatabase.db»)
#conn.row_factory = sqlite3.Row
cursor = conn.cursor()
sql = «SELECT * FROM albums WHERE artist=?»
cursor.execute(sql, )
print(cursor.fetchall()) # or use fetchone()
print(«Here’s a listing of all the records in the table:»)
for row in cursor.execute(«SELECT rowid, * FROM albums ORDER BY artist»):
print(row)
print(«Results from a LIKE query:»)
sql = «SELECT * FROM albums WHERE title LIKE ‘The%'»
cursor.execute(sql)
print(cursor.fetchall())
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 |
importsqlite3 conn=sqlite3.connect(«mydatabase.db») #conn.row_factory = sqlite3.Row cursor=conn.cursor() sql=»SELECT * FROM albums WHERE artist=?» cursor.execute(sql,(«Red»)) print(cursor.fetchall())# or use fetchone() print(«Here’s a listing of all the records in the table:») forrow incursor.execute(«SELECT rowid, * FROM albums ORDER BY artist») print(row) print(«Results from a LIKE query:») sql=»SELECT * FROM albums WHERE title LIKE ‘The%'» cursor.execute(sql) print(cursor.fetchall()) |
Первый запрос, который мы выполнили, называется SELECT *, что означает, что мы хотим выбрать все записи, подходящие под переданное имя исполнителя, в нашем случае это “Red”. Далее мы выполняем SQL и используем функцию fetchall() для получения результатов. Вы также можете использовать функцию fetchone() для получения первого результата
Обратите внимание на то, что здесь есть прокомментированный раздел, связанный с таинственным row_factory. Если вы не прокомментируете эту строку, результат вернется, так как объекты Row, подобны словарям Python и дают вам доступ к полям строк точь в точь, как и словарь
В любом случае, вы не можете выполнить назначение пункта, используя объект Row. Второй запрос очень похож на первый, но возвращает каждую запись в базе данных и упорядочивает результаты по имени артиста в порядке возрастания. Это также показывает, как мы можем зациклить результаты выдачи. Последний запрос показывает, как команда LIKE используется при поиске частичных фраз. В нашем случае, мы искали по всей таблице заголовки, которые начинаются с артикля The. Знак процента (%) является подстановочным оператором.
7.6. Export to CSV
To export an SQLite table (or part of a table) as CSV, simply set
the «mode» to «csv» and then run a query to extract the desired rows
of the table.
sqlite> .headers on sqlite> .mode csv sqlite> .once c:/work/dataout.csv sqlite> SELECT * FROM tab1; sqlite> .system c:/work/dataout.csv
In the example above, the «.headers on» line causes column labels to
be printed as the first row of output. This means that the first row of
the resulting CSV file will contain column labels. If column labels are
not desired, set «.headers off» instead. (The «.headers off» setting is
the default and can be omitted if the headers have not been previously
turned on.)
The line «.once FILENAME» causes all query output to go into
the named file instead of being printed on the console. In the example
above, that line causes the CSV content to be written into a file named
«C:/work/dataout.csv».
The final line of the example (the «.system c:/work/dataout.csv»)
has the same effect as double-clicking on the c:/work/dataout.csv file
in windows. This will typically bring up a spreadsheet program to display
the CSV file.
That command only works as written on Windows.
The equivalent line on a Mac would be:
sqlite> .system open dataout.csv
On Linux and other unix systems you will need to enter something like:
sqlite> .system xdg-open dataout.csv
7.6.1. Export to Excel
To simplify export to a spreadsheet, the CLI provides the
«.excel» command which captures the output of a single query and sends
that output to the default spreadsheet program on the host computer.
Use it like this:
sqlite> .excel sqlite> SELECT * FROM tab;
The command above writes the output of the query as CSV into a temporary
file, invokes the default handler for CSV files (usually the preferred
spreadsheet program such as Excel or LibreOffice), then deletes the
temporary file. This is essentially a short-hand method of doing
the sequence of «.csv», «.once», and «.system» commands described above.
The «.excel» command is really an alias for «.once -x». The -x option
to .once causes it to writes results as CSV into a temporary file that
is named with a «.csv» suffix, then invoke the systems default handler
for CSV files.
There is also a «.once -e» command which works similarly, except that
it names the temporary file with a «.txt» suffix so that the default
text editor for the system will be invoked, instead of the default
spreadsheet.
8. Accessing ZIP Archives As Database Files
In addition to reading and writing SQLite database files,
the sqlite3 program will also read and write ZIP archives.
Simply specify a ZIP archive filename in place of an SQLite database
filename on the initial command line, or in the «.open» command,
and sqlite3 will automatically detect that the file is a
ZIP archive instead of an SQLite database and will open it as such.
This works regardless of file suffix. So you can open JAR, DOCX,
and ODP files and any other file format that is really a ZIP
archive and SQLite will read it for you.
A ZIP archive appears to be a database containing a single table
with the following schema:
CREATE TABLE zip( name, // Name of the file mode, // Unix-style file permissions mtime, // Timestamp, seconds since 1970 sz, // File size after decompression rawdata, // Raw compressed file data data, // Uncompressed file content method // ZIP compression method code );
So, for example, if you wanted to see the compression efficiency
(expressed as the size of the compressed content relative to the
original uncompressed file size) for all files in the ZIP archive,
sorted from most compressed to least compressed, you could run a
query like this:
sqlite> SELECT name, (100.0*length(rawdata))/sz FROM zip ORDER BY 2;
Or using , you can extract elements of the
ZIP archive:
sqlite> SELECT writefile(name,content) FROM zip ...> WHERE name LIKE 'docProps/%';
7.2. Reading SQL from a file
In interactive mode, sqlite3 reads input text (either SQL statements
or ) from the keyboard. You can also redirect input from
a file when you launch sqlite3, of course, but then you do not have the
ability to interact with the program. Sometimes it is useful to run an
SQL script contained in a file entering other commands from the command-line.
For this, the «.read» dot-command is provided.
The «.read» command takes a single argument which is (usually) the name
of a file from which to read input text.
sqlite> .read myscript.sql
The «.read» command temporarily stops reading from the keyboard and instead
takes its input from the file named. Upon reaching the end of the file,
input reverts back to the keyboard. The script file may contain dot-commands,
just like ordinary interactive input.
If the argument to «.read» begins with the «|» character, then instead of
opening the argument as a file, it runs the argument (without the leading «|»)
as a command, then uses the output of that command as its input. Thus, if you
have a script that generates SQL, you can execute that SQL directly using
a command similar to the following:
sqlite> .read '|myscript.bat'
Исключения SQLite3
Исключением являются ошибки времени выполнения скрипта. При программировании на Python все исключения являются экземплярами класса производного от BaseException.
В SQLite3 у есть следующие основные исключения Python:
DatabaseError
Любая ошибка, связанная с базой данных, вызывает ошибку DatabaseError.
IntegrityError
IntegrityError является подклассом DatabaseError и возникает, когда возникает проблема целостности данных, например, когда внешние данные не обновляются во всех таблицах, что приводит к несогласованности данных.
ProgrammingError
Исключение ProgrammingError возникает, когда есть синтаксические ошибки или таблица не найдена или функция вызывается с неправильным количеством параметров / аргументов.
OperationalError
Это исключение возникает при сбое операций базы данных, например, при необычном отключении. Не по вине программиста.
NotSupportedError
При использовании некоторых методов, которые не определены или не поддерживаются базой данных, возникает исключение NotSupportedError.
SQLite3 manager LITE
Сайт производителя: http://www.pool-magic.net/sqlite-manager.htm
Цена: .
Критерий | Оценка (от 0 до 2) | |
Функциональность | 2 | |
Цена | 2 | |
Работа с UTF-8 | ||
Русский интерфейс | ||
Удобство | 1 | |
Итог | 5 |
По сравнению с предыдущей программой “SQLite3 manager LITE” выглядит более функциональным. Кроме того, что можно просто просматривать данные в таблицах, также можно просматривать и создавать триггеры, индексы, представления и т.д. Дополнительно можно экспортировать все мета-данные базы данных. При этом можно создавать файлы с данными для экспорта таблиц в Paradox и Interbase.
Также в программе была предпринята попытка зделать, что-то вроде визуального мастера создания запросов наподобие MS Access, но, на мой взгляд, попытка успехом не увенчалась.
У бесплатной версии есть один недостаток – не понимает данные в кодировке UTF-8. Есть, конечно, возможность указать кодировку базы данных при открытии файла, но в списке кодировок UTF-8 отсутствует. Как работает Full-версия программы я так и не увидел, т.к. на сайте производителя чёрт ногу сломит. Висит какой-то непонятный javascript, выводящий непонятную инфу. В общем, сложилось впечатление, что проект успешно заглох.
Compiling for Unix-like systems
First create a directory in which to place
the build products. It is recommended, but not required, that the
build directory be separate from the source directory. Cd into the
build directory and then from the build directory run the configure
script found at the root of the source tree. Then run «make».
For example:
See the makefile for additional targets.
The configure script uses autoconf 2.61 and libtool. If the configure
script does not work out for you, there is a generic makefile named
«Makefile.linux-gcc» in the top directory of the source tree that you
can copy and edit to suit your needs. Comments on the generic makefile
show what changes are needed.
History
This program was developed originally by Mauricio Piacentini
(@piacentini) from Tabuleiro Producoes, as
the Arca Database Browser. The original version was used as a free companion
tool to the Arca Database Xtra, a commercial product that embeds SQLite
databases with some additional extensions to handle compressed and binary data.
Pete Morgan (@daffodil) created an initial
project on GitHub with the code in 2012, where several contributors fixed and
improved pieces over the years. René Peinthor (@rp-)
and Martin Kleusberg (@MKleusberg) then
became involved, and have been the main driving force from that point. Justin
Clift (@justinclift) helps out with testing
on OSX, and started the new github.com/sqlitebrowser organisation on GitHub.
In September 2014, the project was renamed to «DB Browser for SQLite», to
avoid confusion with an existing application called «Database Browser».
Source install
To skip searching for pre-compiled binaries, and force a build from source, use
The sqlite3 module depends only on libsqlite3. However, by default, an internal/bundled copy of sqlite will be built and statically linked, so an externally installed sqlite3 is not required.
If you wish to install against an external sqlite then you need to pass the argument to wrapper:
If building against an external sqlite3 make sure to have the development headers available. Mac OS X ships with these by default. If you don’t have them installed, install the package with your package manager, e.g. for Debian/Ubuntu. Make sure that you have at least >= 3.6.
Note, if building against homebrew-installed sqlite on OS X you can do:
By default the node-gyp install will use as part of the installation. A
different python executable can be specified on the command line.
This uses the npm_config_python config, so values in .npmrc will be honoured:
Linux
DB Browser for SQLite works well on Linux.
Debian
Note that Debian focuses more on stability rather than newest features. Therefore packages will typically contain some older (but well tested) version, compared to the latest release.
Update the cache using:
Install the package using:
Ubuntu and Derivatives
Stable release
For Ubuntu and derivatives, @deepsidhu1313
provides a PPA with the latest release here:
https://launchpad.net/~linuxgndu/+archive/ubuntu/sqlitebrowser
To add this ppa just type in these commands in terminal:
Then update the cache using:
Install the package using:
Ubuntu 14.04.X, 15.04.X, 15.10.X and 16.04.X are supported for now (until
Launchpad decides to discontinue building for any series).
Ubuntu Precise (12.04) and Utopic (14.10) are not supported:
- Precise does not have a new enough Qt package in its repository by default,
which is a dependency - Launchpad does not support Utopic any more, which has reached its End of
Life
Nightly builds
Nightly builds are available here:
https://launchpad.net/~linuxgndu/+archive/ubuntu/sqlitebrowser-testing
To add this ppa, type these commands into the terminal:
Then update the cache using:
Install the package using:
On others, compile DB4S using the instructions
in BUILDING.md.
14.4. SQLite Archive Insert And Update Commands
The —update and —insert commands work like —create command, except that
they do not delete the current archive before commencing. New versions of
files silently replace existing files with the same names, but otherwise
the initial contents of the archive (if any) remain intact.
For the —insert command, all files listed are inserted into the archive.
For the —update command, files are only inserted if they do not previously
exist in the archive, or if their «mtime» or «mode» is different from what
is currently in the archive.
Compatibility node: Prior to SQLite version 3.28.0 (2019-04-16) only
the —update option was supported but that option worked like —insert in that
it always reinserted every file regardless of whether or not it had changed.
Using MSVC for Windows systems
On Windows, all applicable build products can be compiled with MSVC.
First open the command prompt window associated with the desired compiler
version (e.g. «Developer Command Prompt for VS2013»). Next, use NMAKE
with the provided «Makefile.msc» to build one of the supported targets.
For example, from the parent directory of the source subtree named «sqlite»:
There are several build options that can be set via the NMAKE command
line. For example, to build for WinRT, simply add «FOR_WINRT=1» argument
to the «sqlite3.dll» command line above. When debugging into the SQLite
code, adding the «DEBUG=1» argument to one of the above command lines is
recommended.
SQLite does not require Tcl to run, but a Tcl installation
is required by the makefiles (including those for MSVC). SQLite contains
a lot of generated code and Tcl is used to do much of that code generation.
Further Information
SQLite is free and works great.
Most people use SQLite without
any kind of license or support.
Free support for SQLite is available on the public
SQLite Forum.
The forum is monitored by a large
community of experts, including the core SQLite development team,
who are able to resolve just about
any problems with SQLite that you are likely to have.
Users with more advanced support needs can opt for a
Technical Support
Agreement.
Technical support agreements are customized to the needs of each
individual client, but generally include direct telephone support
and priority handling of issues and bugs. Guaranteed response time
is available as an option. The cost of
technical support varies but is generally
in the range of $8000 to $35000 per year.
If SQLite is «mission critical» to your company, then you may
want to become an
SQLite Consortium
Member. The SQLite
Consortium is a collaboration of companies who sponsor ongoing development
of SQLite in exchange for enterprise-level technical support, on-site
visits from the SQLite developers, unlimited access to all licensed
products, and strong guarantees that SQLite will remain in the public
domain, free and independent, and will not come under the control of
a competitor.
Version Control
SQLite sources are managed using the
Fossil, a distributed version control system
that was specifically designed and written to support SQLite development.
The Fossil repository contains the urtext.
If you are reading this on GitHub or some other Git repository or service,
then you are looking at a mirror. The names of check-ins and
other artifacts in a Git mirror are different from the official
names for those objects. The offical names for check-ins are
found in a footer on the check-in comment for authorized mirrors.
The official check-in name can also be seen in the file
in the root of the tree. Always use the official name, not the
Git-name, when communicating about an SQLite check-in.
If you pulled your SQLite source code from a secondary source and want to
verify its integrity, there are hints on how to do that in the
section below.
Packaging and Building
- Antlr is removed as a dependency
- Niels Lohmann’s JSON library is added as a dependency. A copy of the library is included in the source code.
- Update bundled QScintilla library to version 2.11.1 (e392e64)
- Update bundled QHexEdit2 library to version 0.8.6 (d4401f9)
- Update bunbled QCustomPlot library to version 2.0.1 ()
- Update bundled QDarkStyleSheet to version 2.8 (3b2dec4)
- More flexibility to override library paths (9f28851, b4af221, 800a8da, a692c06, )
- Add support for building with cmake 3.11 and later ()
- cmake installation on macOS also copies the icon and desktop files ()
- Add workaround for Qt bugs QTBUG-68891 and QTBUG-71020 ()
- Include a new SQLite extension for encoding and decoding base64 and decoding plist data (, )
- Include the fileio, soundex, r-tree, and geopoly extensions (0d25d11, 5bf9015, 6565cdc)
- Raise the maximum number of attached databases to 125 when using the bundled SQLite version (402af87, b0bca10)
- Add MIME information file ()
SHA256SUMS
- DB.Browser.for.SQLite-3.12.0-alpha1-win32.msi
- DB.Browser.for.SQLite-3.12.0-alpha1-win32.zip
- DB.Browser.for.SQLite-3.12.0-alpha1-win64.msi
- DB.Browser.for.SQLite-3.12.0-alpha1-win64.zip
- DB.Browser.for.SQLite-3.12.0-alpha1.dmg
Создание базы данных
После создания соединения с SQLite, файл БД создается автоматически, при условии его отсутствия. Этот файл создается на диске, но также можно создать базу данных в оперативной памяти, используя параметр «:memory:» в методе connect. При этом база данных будет называется инмемори.
Рассмотрим приведенный ниже код, в котором создается БД с блоками try, except и finally для обработки любых исключений:
Сначала импортируется модуль sqlite3, затем определяется функция с именем sql_connection. Внутри функции определен блок try, где метод connect() возвращает объект соединения после установления соединения.
Затем определен блок исключений, который в случае каких-либо исключений печатает сообщение об ошибке. Если ошибок нет, соединение будет установлено, тогда скрипт распечатает текст «Connection is established: Database is created in memory».
Далее производится закрытие соединения в блоке finally. Закрытие соединения необязательно, но это хорошая практика программирования, позволяющая освободить память от любых неиспользуемых ресурсов.
SQLite Studio – Manager and Administration
There are lots of SQLite management tools that make working with SQLite databases easier. Instead of creating and managing databases using a command line, these tools provide a set of GUI tools that let you create and manage the database.
The official SQLite website has dozens of such tools listed; you can view them from here: SQLite Management Tools. Here is the recommended one
SQLite Studio: It is a portable tool that doesn’t require an installation. It supports both SQLite3 and SQLite2. You can easily import and export data to various formats like CSV, HTML, PDF, JSON. Its open source and supports Unicode.
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Заключение
SQLite3 даёт множество преимуществ в отличии от других СУБД. Множество фрэймворков таких как Django, Ruby on Rails и web2py по умолчанию используют SQLite3. Многие браузеры используют данный инструмент для хранения локальных данных. Так же она используется в качестве хранилища данных таких ОС как Android и Windows Phone 8.
Для работы с SQLite3 можно воспользоваться и программами с графическим интерфейсом. К примеру: DB Browser for SQLite и SQLiteStudio. Для тренировки работы с SQL можете поиграть с SQL Fiddle.
Данный урок может помочь стартовать с SQLite3. Для взаимодействия с данным СУБД в PHP можем воспользоваться расширением PDO.