Procedimiento almacenado recursivo en SQL Server
CREATE PROCEDURE [dbo].[Factorial_ap]
(
@Number Integer,
@RetVal Integer OUTPUT
)
AS
DECLARE @In Integer
DECLARE @Out Integer
IF @Number != 1
BEGIN
SELECT @In = @Number – 1
EXEC Factorial_ap @In, @Out OUTPUT
SELECT @RetVal = @Number * @Out
END
ELSE
BEGIN
SELECT @RetVal = 1
END
RETURN
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