检查一下，其中前两个参数是输入参数，第三个是Procedure定义中的输出参数。

DECLARE @PK_Code INT;
EXEC USP_Validate_Login 'ID', 'PWD', @PK_Code OUTPUT
SELECT @PK_Code

下面是stored_proc的定义:

create proc product(@a int,@b int)
as
return @a * @b

这是从Python中执行的: Conn = pyodbc.connect('…') Cursor = conn.cursor()

sql = """
SET NOCOUNT ON
declare @r float
exec @r=dbo.product 5,4
select @r
"""
result = cursor.execute(sql)
print (result.fetchall())

CREATE PROCEDURE DBO.MY_STORED_PROCEDURE
(@PARAM1VALUE INT,
@PARAM2VALUE INT,
@OUTPARAM VARCHAR(20) OUT)
AS 
BEGIN
SELECT * FROM DBO.PARAMTABLENAME WHERE PARAM1VALUE=@PARAM1VALUE
END

DECLARE @OUTPARAM2 VARCHAR(20)
EXEC DBO.MY_STORED_PROCEDURE 1,@OUTPARAM2 OUT
PRINT @OUTPARAM2

从过程返回val

ALTER PROCEDURE testme @input  VARCHAR(10),
                       @output VARCHAR(20) output
AS
  BEGIN
      IF @input >= '1'
        BEGIN
            SET @output = 'i am back';

            RETURN;
        END
  END

DECLARE @get VARCHAR(20);

EXEC testme
  '1',
  @get output

SELECT @get 

请查看下面的示例，通过执行存储过程获得输出变量值。

    DECLARE @return_value int,
    @Ouput1 int,
    @Ouput2 int,
    @Ouput3 int

EXEC    @return_value = 'Your Sp Name'
        @Param1 = value1,
        @Ouput1 = @Ouput1 OUTPUT,
        @Ouput2 = @Ouput2 OUTPUT,
        @Ouput3 = @Ouput3 OUTPUT

SELECT  @Ouput1 as N'@Ouput1',
        @Ouput2 as N'@Ouput2',
        @Ouput3 as N'@Ouput3'

你可以这样做:

declare @rowCount int
exec yourStoredProcedureName @outputparameterspOf = @rowCount output