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What is SQL Server Data Constraints Explained about?

SQL constraints are used to define rules for data within tables to ensure accuracy and reliability. Common constraint types in SQL Server include NOT NULL, UNIQUE, PRIMARY KEY, FOREIGN KEY, CHECK, DEFAULT, and INDEX. NOT NULL ensures columns do not contain NULL values, UNIQUE requires column values to be different, PRIMARY KEY combines NOT NULL and UNIQUE, FOREIGN KEY relates data between tables, CHECK defines conditions for column values, DEFAULT provides default values for columns, and INDEX supports fast

Author

AKASH VISHWAKARMA

Language

EN