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How to link a column in one table to another table


louiscb

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Simple question but I couldn't find any straight forward answers.

 

I have a customer details table with: customer ID, name, address, email.

 

I also have an delivery table with delivery ID, customer ID, order ID.

 

How can I link the customer ID column from the customer table to the delivery table so that when changes occur on the customer table they subsequently alter all other tables?

 

I know it might use foreign keys but I couldn't find any online resource that explained how to use them properly.

Cheers

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