You can check the SQL Server is cluster or standalone using one of the below technique.
Technique 1: Go to server properties from SSMS and check the Is Clustered property.
Technique 2: Execute the below query, it will retun Boolean value. (1 = True and 0=False)
SELECT
CONVERT(char(20),
SERVERPROPERTY(‘IsClustered’))



Thanks for the comment, will get back to you soon… Jugal Shah