How to use Cascade Delete in SQL?

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Hey guys,

I'm kinda stuck now so I might ask as well, I already created a 2 tables with 2 columns in a relationship. How can I use cascade delete to automatically delete the foreign key rows when the primary key row got deleted?

I dont get how the code block for this thing works, all the example I saw have the table and column creation mixed with the code block and other codes that makes it hard for me to understand.

Posted 17-Mar-14 10:52am

KatsuneShinsengumi

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_Maxxx_ · Accepted Answer · 2014-03-17T14:26:00

This may not be what you are looking for, but personally I never use cascading deletes.

If I do find the need to delete the primary key table to a foreign key constraint, I first just delete all the rows with that foreign key

i.e.

delete from customersales where customerId = 23
delete from customer where customerid = 23

that way I am in control, and I needn't worry about someone accidentally deleting a whole bunch of records they didn't mean to!