How to Fetch Data with Dynamic Column Names in SQL Server?

Fetching Data with Dynamic Column Names in SQL

Manipulating dynamic column names enhances the flexibility of SQL queries. In this context, let's explore how to dynamically select a column name based on a variable in the Microsoft SQL Server environment.

Consider a stored procedure where the column name is set through a passed-in variable, as shown below:

CREATE PROCEDURE [My_Procedure]
   @myDynamicColumn varchar(50)
AS BEGIN
   SELECT 'value' AS @myDynamicColumn
END

However, this approach results in an "Incorrect syntax" error. To rectify this, we can embrace dynamic SQL, which allows us to construct SQL statements on the fly.

EXEC ('SELECT ''value'' AS ' + @myDynamicColumn)

In this revised version, we utilize the EXEC command to dynamically execute a SQL statement where the column name is dynamically generated. The resulting output will be the intended value, rather than the literal column name. This technique provides a dynamic way to retrieve data based on variable column names in SQL Server.

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