SQLite
The only database you'll ever need.
SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. SQLite is the most widely deployed SQL database engine in the world. The source code for SQLite is in the public domain.
In the public domain, that is unlicenced, not GPL.
http://www.sqlite.org/docs.html
http://www.sqlite.org/lang.html
http://en.wikipedia.org/wiki/SQLite
... SQLite development stores revisions of its source code in Fossil, a distributed version control system that is itself built upon an SQLite database.
Tutorials
http://www.w3resource.com/sqlite/index.php
Could be best tutorial.
http://www.sqlite.org/datatype3.html
Each value stored in an SQLite database (or manipulated by the database engine) has one of the following storage classes:
NULL. The value is a NULL value.
INTEGER. The value is a signed integer, stored in 1, 2, 3, 4, 6, or 8 bytes depending on the magnitude of the value.
REAL. The value is a floating point value, stored as an 8-byte IEEE floating point number.
TEXT. The value is a text string, stored using the database encoding (UTF-8, UTF-16BE or UTF-16LE).
BLOB. The value is a blob of data, stored exactly as it was input.
http://zetcode.com/db/sqlite/
http://www.tutorialspoint.com/sqlite/
http://souptonuts.sourceforge.net/readme_sqlite_tutorial.html
http://freecode.com/articles/sqlite-tutorial
http://www.techonthenet.com/sqlite/
http://www.w3resource.com/sqlite/index.php
http://www.thegeekstuff.com/2012/09/sqlite-command-examples/
Tools
Mozilla and SQLite
https://developer.mozilla.org/en-US/docs/Storage
https://developer.mozilla.org/en-US/search?q=sqlite
https://addons.mozilla.org/en-us/firefox/addon/sqlite-manager/
See Firefox plugin SQLite Manager - Firefox#SQLite
SQLite Browser
Update Nov 6 2017
The program is named "sqlitebrowser", as in sudo apt-get install sqlitebrowser, but is called "DB Browser for SQLite" at the application level.
It was always good, and over the last year or two has gotten better. QT based, it's almost identical in functionality to the FireFox SQLite Manager plugin and seems about as stable. And it runs on the Raspberry Pi Zero ! :-)
Recommended.
DB Browser for SQLite is a high quality, visual, open source tool to create, design, and edit database files compatible with SQLite.
https://github.com/sqlitebrowser/sqlitebrowser
DB Browser for SQLite project. Previously known as "SQLite Database Browser" and "Database Browser for SQLite".
https://github.com/sqlitebrowser/sqlitebrowser/blob/master/BUILDING.md
The GPL version of Qt is available in almost all Linux distributions as a default package.
Linux is version 2.0, versus current Windows version 3.5.1. Can build with cmake and QT5. Source code includes most ( all ? ) of its own dependencies, except for QT5.
Windows version is 'bi-licensed'. Kinky Windows !!!
Command Line Interface
http://www.sqlite.org/cli.html
For a listing of the available dot commands, you can enter ".help" at any time. For example:
sqlite> .help
.backup ?DB? FILE Backup DB (default "main") to FILE
.bail on|off Stop after hitting an error. Default OFF
.clone NEWDB Clone data into NEWDB from the existing database
.databases List names and files of attached databases
.dump ?TABLE? ... Dump the database in an SQL text format
If TABLE specified, only dump tables matching
LIKE pattern TABLE.
.echo on|off Turn command echo on or off
.eqp on|off Enable or disable automatic EXPLAIN QUERY PLAN
.exit Exit this program
.explain ?on|off? Turn output mode suitable for EXPLAIN on or off.
With no args, it turns EXPLAIN on.
.fullschema Show schema and the content of sqlite_stat tables
.headers on|off Turn display of headers on or off
.help Show this message
.import FILE TABLE Import data from FILE into TABLE
.indices ?TABLE? Show names of all indices
If TABLE specified, only show indices for tables
matching LIKE pattern TABLE.
.load FILE ?ENTRY? Load an extension library
.log FILE|off Turn logging on or off. FILE can be stderr/stdout
.mode MODE ?TABLE? Set output mode where MODE is one of:
csv Comma-separated values
column Left-aligned columns. (See .width)
html HTML <table> code
insert SQL insert statements for TABLE
line One value per line
list Values delimited by .separator string
tabs Tab-separated values
tcl TCL list elements
.nullvalue STRING Use STRING in place of NULL values
.once FILENAME Output for the next SQL command only to FILENAME
.open ?FILENAME? Close existing database and reopen FILENAME
.output ?FILENAME? Send output to FILENAME or stdout
.print STRING... Print literal STRING
.prompt MAIN CONTINUE Replace the standard prompts
.quit Exit this program
.read FILENAME Execute SQL in FILENAME
.restore ?DB? FILE Restore content of DB (default "main") from FILE
.save FILE Write in-memory database into FILE
.schema ?TABLE? Show the CREATE statements
If TABLE specified, only show tables matching
LIKE pattern TABLE.
.separator STRING ?NL? Change separator used by output mode and .import
NL is the end-of-line mark for CSV
.shell CMD ARGS... Run CMD ARGS... in a system shell
.show Show the current values for various settings
.stats on|off Turn stats on or off
.system CMD ARGS... Run CMD ARGS... in a system shell
.tables ?TABLE? List names of tables
If TABLE specified, only list tables matching
LIKE pattern TABLE.
.timeout MS Try opening locked tables for MS milliseconds
.timer on|off Turn SQL timer on or off
.trace FILE|off Output each SQL statement as it is run
.vfsname ?AUX? Print the name of the VFS stack
.width NUM1 NUM2 ... Set column widths for "column" mode
Negative values right-justify
Full Text Search
https://www.sqlite.org/fts3.html
The FTS3 and FTS4 extension modules allows users to create special tables with a built-in full-text index (hereafter "FTS tables"). The full-text index allows the user to efficiently query the database for all rows that contain one or more words (hereafter "tokens"), even if the table contains many lar[ge documents].
https://github.com/coolaj86/sqlite-fts-demo
Install the latest version of SQLite3 (>= 3.7.14) ... Don't use the one that comes with OS X, no matter the version ...
However, as you approach somewhere between 10,000 and 100,000 records, you might notice your queries starting to run slower (whole seconds, even minutes) ...
If you have a MacBook? Pro with 16GiB RAM and the 1.5GiB database is still in your disk cache then that query will take around 4.5 seconds ...
Issues and Answers
SQLite to the Max ...
Triggers Rather Than Foreign Key References
Using triggers instead of referencing foreign keys.
https://www.sqlite.org/lang_createview.html
You cannot DELETE, INSERT, or UPDATE a view. Views are read-only in SQLite. However, in many cases you can use an INSTEAD OF trigger on the view to accomplish the same thing.
https://www.sqlite.org/lang_createtrigger.html#instead_of_trigger
https://www.sqlite.org/omitted.html
https://www.sqlite.org/lang_createtrigger.html
