Swap the Values of Two Columns in SQL Server

Swapping Values of Columns in SQL Server: An Overview

Suppose you want to swap the values of two columns of a table in SQL Server, how could you achieve this tricky task? It is simple and so funny.

Read More: SQL Server Interview Questions and Answers

How to Swap Values of Two Columns of a Table in SQL Server?

Suppose you have a Customer table in the database with the following data and you want to interchange the values of columns, Name and Address then how do you do it?

Read More: Basics of SQL Commands

 SELECT * FROM CUSTOMER 

Output

Don't worry, to do this task, you need to just write a simple update query for the Customer table like as:

 UPDATE Customer SET Name=Address , Address=Name 

Now after query execution, you will find that the values of columns, Name, and Address have been interchanged, that's so cool.

SELECT * FROM CUSTOMER
 

Output

Note

1. The data type of both columns should be the same and also the length should be enough to hold the swapped column data the data will be truncated.

Read More - Commonly Asked DBMS Interview Questions

What do you think?

I hope you will enjoy this trick while having fun with SQL Server. I would like to have feedback from my blog readers. If you want to gain a practical understanding, you can enroll in our SQL Server Course.

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