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To run a query directly on a SQLite file, the sqlite
extension is required. This can be installed use the INSTALL
SQL command. This only needs to be run once.
INSTALL sqlite;
To load the sqlite
extension for usage, use the LOAD
SQL command:
LOAD sqlite;
After the SQLite extension is installed, tables can be queried from SQLite using the sqlite_scan
function:
-- scan the table "tbl_name" from the SQLite file "test.db"
SELECT * FROM sqlite_scan('test.db', 'tbl_name');
Alternatively, the entire file can be attached using the sqlite_attach
command. This creates views over all of the tables in the file that allow you to query the tables using regular SQL syntax.
-- attach the SQLite file "test.db"
CALL sqlite_attach('test.db');
-- the table "tbl_name" can now be queried as if it is a regular table
SELECT * FROM tbl_name;
For more information see the SQLite scanner documentation.
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