mysql - strange foreign key constraint violation in child table when selecting if from parent table -


Note: ID of the book is its title 

  Ignore category_book as user_id Select 1, as the 'name' category_name, BID Book book as a book, where BID Regex ('word') and not BID

I am getting:

MySQL error 1452: Adding or updating a hair line Can be done: A foreign key constraint failed ( book . category_book , CONSTRAINT fk_category_book_book1 foreign key ( book_id )

It looks like you try to insert a record in category_book And to that which does not exist in Buk_aidi table books may be ordered Sreni_buk columns are not the same, you are providing the selection. Try the same query but the insert section shows the columns in it.


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