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Thread: How fix error 1451 can not delete or update a parent row?

  1. #1
    Join Date
    Jan 2016
    Posts
    38

    How fix error 1451 can not delete or update a parent row?

    Hello,

    I have two columns. Ride and booking.
    In table booking there is the foreign key of ride.
    The intention is that 30-day and later bookings will be removed.
    If I run this query, I get the error message: mysql 1451 can not delete or update a parent row
    The query is:
    Code:
        DELETE FROM booking WHERE DATEDIFF(NOW() ,Date )>30;
    I searched the Internet and found this solution:
    Code:
        SET foreign_key_checks = 0;
        DELETE FROM booking WHERE DATEDIFF(NOW() ,Date )>30;
        SET foreign_key_checks = 1;
    The second query does work,
    My question is: Is there another way to remove bookings?

    thanks in advance

  2. #2
    Join Date
    Aug 2004
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    Ankh-Morpork
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    21,921
    How is the foreign key actually defined? Does it include an ON DELETE that should be changed to a NO ACTION, perhaps?
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