How to create custom functions in SQLite
SqliteSqlite Problem Overview
Can you create functions in SQLite like you can in MSSQL?
If so, how? What is the syntax?
Thanks
Sqlite Solutions
Solution 1 - Sqlite
SQLite does not have a stored function/stored procedure language. So CREATE FUNCTION does not work. What you can do though is map functions from a c library to SQL functions (user-defined functions). To do that, use SQLite's C API (see: http://www.sqlite.org/c3ref/create_function.html)
If you're not using the C API, your wrapper API may define something that allows you access to this feature, see for example:
-
PHP
sqlite_create_function()(http://www.php.net/manual/en/function.sqlite-create-function.php) -
Python
sqlite3.create_function()(http://docs.python.org/3/library/sqlite3.html#sqlite3.Connection.create_function) -
Perl
$dbh->sqlite_create_function($name,$argc,$code_ref,$flags)(https://metacpan.org/pod/DBD::SQLite#$dbh-%3Esqlite_create_function(-$name,-$argc,-$code_ref,-$flags-))
Solution 2 - Sqlite
This could be useful to many: in SQLiteStudio it is possible to define new functions and collations easily from interface through a sql built-in plugin for example.
https://github.com/pawelsalawa/sqlitestudio/wiki/Official_plugins#sql-built-in
Through the function editor.