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Which constraints is used to establish parent-child relation between two or more tables ?

Question

Which constraints is used to establish parent-child relation between two or more tables ?

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Solution

The constraint used to establish a parent-child relationship between two or more tables in a database is known as a "Foreign Key" constraint.

Here are the steps to establish this relationship:

  1. Identify the tables that you want to relate. One will be the "parent" table, and the other will be the "child" table.

  2. In the child table, create a new column that will hold the foreign key. This column will typically have the same data type as the primary key of the parent table.

  3. Define a foreign key constraint on the child table

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