Mysql modify foreign key

-- 2 Step process
ALTER TABLE tbl_name_1 DROP FOREIGN KEY fk_name;
ALTER TABLE tbl_name_1 ADD FOREIGN KEY fk_name(fk_col)
            REFERENCES tbl_name_2(pk_name) ON DELETE RESTRICT;


-- Use to find the name of the FOREIGN KEY 
SHOW CREATE TABLE tbl_name;

Source: stackoverflow.com

Mysql alter add foreign key

ALTER TABLE ordenes ADD ticket VARCHAR(50) NOT NULL;
ALTER TABLE ordenes ADD CONSTRAINT fk_ticket FOREIGN KEY (ticket) REFERENCES tickets(ticket);

Source: es.stackoverflow.com

Update foreign key value in mysql

SET foreign_key_checks = 0;
UPDATE languages SET id='xyz' WHERE id='abc';
UPDATE categories_languages SET language_id='xyz' WHERE language_id='abc';
SET foreign_key_checks = 1;

Source: stackoverflow.com

Similar codes

0 vote200 views1 answer
Oracle sql how to overcome 999 limit for IN
SQL
0 vote199 views1 answer
Oracle cpu metric
SQL
20 votes177 views2 answers
Mysql bigint max value
SQL
1 vote214 views1 answer
Sqlalchemy on delete set null
SQL
0 vote198 views1 answer
Incorrect datetime value sql table error 1292
SQL
4 votes191 views1 answer
Mysql set max connections
SQL
0 vote215 views2 answers
Dumping sql table
SQL
0 vote186 views1 answer
Default value false mysql
SQL
0 vote182 views1 answer
Mysql start of today
SQL
1 vote156 views1 answer
Database run
SQL