How to get all tables those are having a primary key
How to get all the tables in database those are having primary key constraints ?
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find primary key on a table
Primary Key VS Composite Key?
A PRIMARY KEY constraint uniquely identifies each record in a table .
A COMPOSITE KEY is a combination of two or more columns in a table that can be used to uniquely identify each row in the table when the columns are combined uniqueness is guaranteed, but when it taken individually it does not guarantee uniqueness.