Constraints in SQL Server
In this video, we will be discussing constraints in SQL Server and the different types of constraints that can be used to ensure data integrity and consistency in a database.
Constraints are rules that are enforced by the database management system to maintain the accuracy and reliability of data. They can be applied to tables and columns in a database to restrict the type of data that can be entered or to ensure that certain conditions are met.
We will cover the following types of constraints:
NOT NULL Constraint: Ensures that a column cannot have a NULL value.
UNIQUE Constraint: Ensures that each value in a column is unique and different from all other values in the same column.
CHECK Constraint: Ensures that the values in a column satisfy a specified condition or range.
DEFAULT Constraint: Sets a default value for a column if no value is specified.
We will also discuss how to create and modify constraints using SQL Server Management Studio and Transact-SQL.
By the end of this video, you will have a thorough understanding of constraints in SQL Server and how to use them to maintain data integrity and consistency in your database.
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