How to configure Query Database ?

I am trying to connect Appian to my Microsoft SQL Server. In order to validate entry in my form i am configuring/setting Query Database.

However i couldn't find any document for step by step tutorial to connect to my DB.

I dropped Query Database in Process Designer view canvas and tried to setup the data source and this is the error i am getting -

  

 

Where i can find documentation with proper example to connect to MS SQL Server ?

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