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CONSTRAINTS in SQL

  • Writer: Ekta Aggarwal
    Ekta Aggarwal
  • Jan 11, 2021
  • 1 min read

While creating a SQL table we would want to put some restrictions/constraints on the table so that some unnecessary or duplicate values don't get fetched in our data. These constraints can be mentioned while CREATING A TABLE or ALTERING a table.


Some of the major constraints widely used are:


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