what are constraints? Explain different types of constraints? : Sql server database administration
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Answer Posted / Neeraj Chaudhary
Constraints in SQL Server are rules that are defined to enforce data integrity. Different types of constraints include: CHECK CONSTRAINTS - enforce user-defined conditions, UNIQUE CONSTRAINTS - ensure uniqueness of a column or group of columns, PRIMARY KEY CONSTRAINTS - define the primary key for a table, FOREIGN KEY CONSTRAINTS - establish relationships between tables and ensure referential integrity.
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