When we want to establish a relationship between two tables, eventually we have to do it with a help of Foreign Key. It refers one table to another tables Primary Key. To demonstrate it we will need two tables. Its see how to relationship between those two table;
It is so simple, but make sure to name your constants otherwise you may be in trouble if you want to drop constraints.
You can add a Foreign key constraint to a table by Altering it;
You can add a Foreign key constraint to a table by Altering it;
How to drop constraint?
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