Resolve foreign key Can not delete or update a parent row: a foreign key constraint fails the mysql error

1 issue

Delete the foreign key data or time table, mysql error appears:

Cannot delete or update a parent row: a foreign key constraint fails

2 Solutions

    SET foreign_key_checks = 0; // to set off the foreign key constraint checking
     
    drop table mytable; // delete the data, table or view
     
    SET foreign_key_checks = 1; // Open a foreign key constraint checking, in order to maintain the structural integrity of the table

Turn off foreign key constraints, perform the removal, and then turn the foreign key constraint