How to get sp_executesql result into a variable?

Question

I have a piece of dynamic SQL I need to execute, I then need to store the result into a variable.

I know I can use sp_executesql but can\'t find clear e

Answer 1

DECLARE @vi INT
DECLARE @vQuery NVARCHAR(1000)

SET @vQuery = N'SELECT @vi= COUNT(*) FROM '

EXEC SP_EXECUTESQL 
        @Query  = @vQuery
      , @Params = N'@vi INT OUTPUT'
      , @vi = @vi OUTPUT

SELECT @vi