SQLite remains a toy-database, its limitations honestly admitted by the sqlite crew on the sqlite site.
One might as well start out with a real database.
To use PostgreSQL, replace the SQLite connection string ("dbi:SQLite:Test.sqlite") with a connection string for PostgreSQL, for instance: "dbi:Pg:port=6542;db=testdb". The three parts in the above tutorial (create table, insert rows, select rows) will run the same on this postgresql $dbh (data base handle).
The PostgreSQL flavour of SQL is here: sql-commands.html
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