Transact SQL (T-SQL)

[graipher]

Language
A Microsoft proprietary extension of SQL.

T-SQL expands on the SQL standard to include procedural programming, local variables, various support functions for string processing, date processing, mathematics, etc. and changes to the DELETE and UPDATE statements.

https://en.wikipedia.org/wiki/Transact-SQL

Seems like Github already supports it:

DECLARE @var1 NVARCHAR(30);
SET @var1 = 'Some Name';
SELECT @var1 = Name
  FROM Sales.Store
  WHERE CustomerID = 100;