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 vote147 views1 answer
Get max salary from each department sql
SQL
0 vote133 views1 answer
Flask sqlalchemy update row
SQL
1 vote138 views1 answer
Oracle rolling back transactions
SQL
0 vote133 views1 answer
Distinct data types in a table sql query
SQL
42 votes210 views6 answers
Sql query duplicate rows
SQL
0 vote206 views1 answer
1422: Explicit or implicit commit is not allowed in stored function or trigger
SQL
0 vote140 views1 answer
Move table to a different schema
SQL
9 votes140 views6 answers
Sql insert into
SQL
0 vote165 views1 answer
Sql tablo sp
SQL
0 vote144 views1 answer
Sql not exists
SQL