SQL Add Drop Primary Key in Hindi | SQL Tutorial
SQL Course: ALTER Command to Add Drop Primary Key in Hindi
SQL Add Drop Primary Key is a command used to add or drop a primary key constraint from a table in a SQL database. A primary key is a column or combination of columns used to uniquely identify each row in a table. Adding a primary key to a table ensures that each row is unique and helps maintain the integrity of the data. Dropping a primary key removes the unique identifier associated with the table.
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