I want to use constraints in SQLite.
Scenario: Stop parent delete if child is present.
How can I achieve that?
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I want to use constraints in SQLite.
Scenario: Stop parent delete if child is present.
How can I achieve that?
Corrected: SQLite supports foreign key constraints, but they’re off by default. You have to enable them at run time with this statement. (That means you can’t set this once, and expect it to stick. If you forget to set it just once, you can delete rows from the parent and leave orphans in the child table.)
Details are at Enabling Foreign Key Support
SQLite can be compiled with foreign key support entirely disabled. That’s something to keep in mind.