But better go with this:

declare @Year int = 16

declare @ThisYear varchar(10), @LastYear varchar(10)

SELECT @ThisYear = CONVERT(VARCHAR(10), @Year) + '-' + CONVERT(VARCHAR(10), @Year + 1),

@LastYear = CONVERT(VARCHAR(10), @Year-1) + '-' + CONVERT(VARCHAR(10), @Year)

PRINT @ThisYear PRINT @LastYear

select *

FROM test1 t1

INNER JOIN test t2 on t2.col = @LastYear

WHERE t1.Col = @ThisYear