Enable a column to optionally not require a value by designating it as a nullable column : Constraints Basics « Constraints « SQL Server / T-SQL

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SQL Server / T-SQL » Constraints » Constraints Basics 
Enable a column to optionally not require a value by designating it as a nullable column


1> -- Nullability
2>
3> -- Enable a column to optionally not require a value by designating it as a
4> -- nullable column.
5>
6CREATE TABLE MyTable
7>      Category nVarChar(50NOT NULL
8>      , MyDescription nVarChar(50)
9)
10INSERT MyTable (CategoryVALUES ('Category1')
11>
12SELECT FROM MyTable
13> GO

(rows affected)
Category                                           MyDescription
-------------------------------------------------- -------------------------------
Category1                                          NULL

(rows affected)
1>
2> drop table MyTable
3> GO
1>
           
       
Related examples in the same category
1.NOT NULL column and NULL column
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