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 PRIMARY KEY AUTOINCREMENT, id2 INTEGER, book TEXT, FOREIGN KEY(id2) REFERENCES A(id) );
After I insert data into A
, it looks like this:
1 John 2 Amy 3 Peter
After I insert data into B
, it looks like this:
1 1 Lord of the Rings 2 1 Catch 22 3 2 Sum of All Fears 4 3 Hunt for Red October
I then execute the following statement:
delete from a where id=1;
I get the following: "Error: foreign key constraint failed"
I then restart sqlite3
and try again but this time I enter this first:
PRAGMA foreign_keys = 1;
it still doesn’t work……