SQL Server Course for Beginners with 100+ examples - Aliases

The video tutorial explains the use of check constraints in SQL, which are used to restrict the values that can be inserted into a column. It provides examples of setting constraints for age and salary records, demonstrating how to create a table with these constraints. The tutorial also shows how to insert records, handle errors when constraints are violated, and correct these errors by re-inserting valid records. The focus is on ensuring data integrity by using check constraints effectively.

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