sqlite3 “foreign key constraint failed”

Question

I\'ve set up two tables:

CREATE TABLE A
(
    id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
    name TEXT
 );

CREATE TABLE B
(
    id INTEGER NOT NULL PRIM         


        

Answer 1

The "problem" is that you have set a foreign key on table B.

foreign key(id2) references A(id)

This means that column id2 in table B references column id in table A. Both Lord of the Rings and Catch 22 from Table B are linked to John from Table A. Therefore you cannot delete John without first deleting these other two entries from Table B first.

The alternative would be to remove the foreign key.

See this documentation for more details.