Part-4 || MS SQL Tutorial in Bengali || Altering an existing column to add a default constraint
In this tutorial, you will learn how to alter an existing column in a Microsoft SQL Server (MS SQL) database to add a *default constraint*. A default constraint is useful when you want to ensure that a column always has a default value if no value is provided during the insertion of data.
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What you’ll learn in this video:
How to use the ALTER TABLE and ALTER COLUMN commands to modify an existing column.
Step-by-step guide to adding a default constraint to a column.
Understanding when and why default constraints are used in databases.
Best practices for handling existing data while adding constraints.
By the end of this video, you will be able to confidently modify columns and add default constraints to ensure your database behaves as expected when new data is inserted.
Useful Commands & Resources:
T-SQL script for altering a column and adding default constraints.
Tips for working with constraints and managing data integrity in SQL Server.
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