Encryption Operations in SQL Server

Hello everyone,

In this article, I will try to give information about encryption operations in SQL Server.

In SQL Server, in some cases, you may want to encrypt the data you have.

You can easily do this using the code below.

DECLARE @TestData NVARCHAR(MAX) = N'Yavuz Selim Kart';
SELECT HASHBYTES('MD2', @TestData) AS [Hash value],
       DATALENGTH(HASHBYTES('MD2', @TestData)) AS [Data lenght];
SELECT HASHBYTES('MD4', @TestData) AS [Hash value],
       DATALENGTH(HASHBYTES('MD4', @TestData)) AS [Data lenght];
SELECT HASHBYTES('MD5', @TestData) AS [Hash value],
       DATALENGTH(HASHBYTES('MD5', @TestData)) AS [Data lenght];
SELECT HASHBYTES('SHA', @TestData) AS [Hash value],
       DATALENGTH(HASHBYTES('SHA', @TestData)) AS [Data lenght];
SELECT HASHBYTES('SHA1', @TestData) AS [Hash value],
       DATALENGTH(HASHBYTES('SHA1', @TestData)) AS [Data lenght];
SELECT HASHBYTES('SHA2_256', @TestData) AS [Hash value],
       DATALENGTH(HASHBYTES('SHA2_256', @TestData)) AS [Data lenght];
SELECT HASHBYTES('SHA2_512', @TestData) AS [Hash value],
       DATALENGTH(HASHBYTES('SHA2_512', @TestData)) AS [Data lenght];

When you run the above code, you will see a result similar to the one below.

As you can see, we have encrypted the data.

Good luck to everyone in business and life.