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John Peter
Pune, Maharashtra, India
How to ignore constraints while insert,update or delete records in Mysql?
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How to ignore below error while delete or update. 
Error Code: 1451
Cannot delete or update a parent row: a foreign key constraint fails (`schema`.`refered_table_name`, CONSTRAINT `linked_key_ibfk_1` FOREIGN KEY (`reference_col`) REFERENCES `table_name` (`linked_column`))

How to ignore foreign key checks
-- this line tells to ignore foreign key checks
SET foreign_key_checks = 0;

-- delete all records
DELETE from user_info;
TRUNCATE user_info;

-- 1 value is not allow to remove or delete without constraints
SET foreign_key_checks = 1;
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