Tutorial 20 – Primary key in SQL | Postgres

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In this video I explained what a primary key is.
A primary key is a column or a group of columns that is used to uniquely identify a record in a table.

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I have always understood primary key in a confusing way until I watched this video, thanks for the painstaking effort in making this topic a comprehensive one... just like others too.

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Tutorial 20 – Primary key in SQL | Postgres

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