Android Sqlite trigger operation go through

Question

This is my first table it has 3 columns and all are entered by the user. No complication and it works

Answer 1

You have added an INSERT trigger. This raises an error if you try and insert a row that doesn't match the constraint specified in the trigger; it does nothing about deleting rows from one table when rows from another are deleted.

You need an AFTER DELETE trigger on the first table which deletes the corresponding rows.