Drop foreign key mysql

Foreign key mySql

CREATE TABLE parent (
    id INT NOT NULL,
    PRIMARY KEY (id)
) ENGINE=INNODB;

CREATE TABLE child (
    id INT,
    parent_id INT,
    INDEX par_ind (parent_id),
    FOREIGN KEY (parent_id)
        REFERENCES parent(id)
        ON DELETE CASCADE
) ENGINE=INNODB;

Source: dev.mysql.com

Drop all foreign key constraints mysql

SET foreign_key_checks = 0;

Source: stackoverflow.com

Mysql remove foreign key constraint

ALTER TABLE jobs DROP FOREIGN KEY constraint_name

Mysql drop key

ALTER TABLE tbl_quiz_attempt_master
  DROP INDEX `PRIMARY`;

Source: stackoverflow.com

Drop foreign key mysql

ALTER TABLE table_name DROP FOREIGN KEY constraint_name

Source: tutorialspoint.com

Add column mysql with foreign key

ALTER TABLE `TABLE_NAME`
ADD COLUMN `COLUMN_NAME` BIGINT(20) UNSIGNED NULL DEFAULT NULL AFTER `AFTER_COLUMN_NAME`, 
ADD FOREIGN KEY `FOREIGN_RELATION_NAME`(`COLUMN_NAME`) REFERENCES `FOREIGN_TABLE`(`FOREIGN_COLUMN`)  ON UPDATE SET NULL ON DELETE SET NULL

Similar codes

-1 vote147 views1 answer
Mysql how to set update or create
SQL
0 vote268 views1 answer
Consulta alias con inner join
SQL
0 vote264 views1 answer
Show all mongodb
SQL
0 vote216 views1 answer
How to check oracle index table
SQL
2 votes180 views1 answer
Can you use a where clause for a child query
SQL
1 vote289 views2 answers
Truncate table sqlite
SQL
2 votes200 views1 answer
Enum in SQL Server
SQL
0 vote202 views1 answer
Create mysql pool connection python flask
SQL
0 vote202 views1 answer
Typical max-connect-errors mysql
SQL
8 votes202 views3 answers
SQL column name
SQL