What should I do if error 1451 occurs in navicat?
[Err] 1451 - Cannot delete or update aparent row: a foreign key constraint fails (`test`.`orders`, CONSTRAINT`fk_orders_customers` FOREIGN KEY (`cust_id`) REFERENCES `customers`(`cust_id`))
When deleting duplicate data in navicat, the above error is reported: a foreign key prevents this operation.
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Solution:
The table has a foreign key delete There are two ways to handle the operation error:
(1) Temporarily set the foreign key to invalid
(2) Delete the data of the table related to the foreign key
1. Foreign key Failure method
mysql> SET FOREIGN_KEY_CHECKS = 0; # 临时设置外键失效 mysql>执行操作 mysql> SET FOREIGN_KEY_CHECKS = 1; # 操作结束后恢复外键
Attachment: Directly execute the sql statement through the navicat query editor
2. Method of deleting the table (this operation is generally not used)
Through the navicat tool , view the table associated with the table's foreign key, and then delete.
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