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How to Check SQL Server Installation Date Time ?

You need to run the following query and it will give you the date of your SQL Server Installation.

SELECT @@SERVERNAME SERVERNAME, CREATE_DATE ‘INSTALALTIONDATE’

FROM SYS.SERVER_PRINCIPALS

WHERE SID = 0X010100000000000512000000

SID 0X010100000000000512000000 is belongs to user "NT AUTHORITYSYSTEM". This user create at the time of installation only.

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Reference : Rohit Garg ()

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