Search results
3 cze 2015 · The quickest and dirtiest way is to turn off foreign key checks, drop the table and then turn the checks back on. SET FOREIGN_KEY_CHECKS=0; drop table mytable SET FOREIGN_KEY_CHECKS=1;
Learn how to delete a FOREIGN KEY constraint in MySQL using the ALTER TABLE command. See the syntax and examples for other types of constraints (UNIQUE, PRIMARY KEY, CHECK) in SQL Server, Oracle and MS Access.
22 sty 2017 · Here's a way to drop foreign key constraint, it will work. ALTER TABLE location.location_id DROP FOREIGN KEY location_ibfk_1;
Learn how to create, alter and drop a FOREIGN KEY constraint in MySQL. A FOREIGN KEY is a field that refers to the PRIMARY KEY in another table and prevents invalid data.
Learn how to create and manage foreign key constraints in MySQL, which enforce data integrity across tables. See syntax, examples, conditions, restrictions, and referential actions for foreign keys.
Drop foreign key MySQL. For dropping a Foreign key from a MySQL table, you need to know the name of the foreign key first. You can get the name of the foreign key by show create table command as follows. SHOW CREATE TABLE Subject; Output: Now, you can drop the foreign key using the following command. ALTER TABLE Subject DROP FOREIGN KEY subject ...
MySQL Server and NDB Cluster both support the use of ALTER TABLE to drop foreign keys: ALTER TABLE tbl_name DROP FOREIGN KEY fk_symbol ; Adding and dropping a foreign key in the same ALTER TABLE statement is supported for ALTER TABLE ...
