Question

在查询中苦苦挣扎。做了几处改动，但无法让它发挥作用。

这些过程本身作为查询工作，但在另一个过程中调用时不起作用;因为我在调试

时看不到填充的变量值

感谢任何帮助？

            Exec dbo.usr_GetLastDate @TableName, @LastTransDate
            EXEC dbo.usr_GetRecCount @TableName, @RecCount

ALTER PROCEDURE [dbo].[usr_GetLastDate]
    -- Add the parameters for the stored procedure here
    @TableName SYSNAME,
    @OUTDATE date Output
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    -- Insert statements for procedure here
   DECLARE @SQLCommand NVARCHAR(MAX) = 
        N'SELECT @OUTDATE=MAX(TRANSDATE) FROM ' + QUOTENAME(@TableName);

   EXECUTE [dbo].[sp_executesql] 
             @sqlCommand, N'@OUTDATE DATE OUTPUT', @OUTDATE=@OUTDATE OUTPUT;

END

ALTER PROCEDURE [dbo].[usr_GetRecCount]
    -- Add the parameters for the stored procedure here
    @TableName SYSNAME,
    @OUTINT int output

AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    -- Insert statements for procedure here
   DECLARE @SQLCommand NVARCHAR(MAX) = 
        N'SELECT @OUTINT=COUNT(SYMBOL) FROM ' + QUOTENAME(@TableName);


   EXECUTE [dbo].[sp_executesql] 
             @sqlCommand, N'@OUTINT INT OUTPUT', @OUTINT=@OUTINT OUTPUT;
END

Answer 1

如果您正在使用visual studio 您可以在“变量”窗口中看到所有变量值。表达式仅在具有范围时显示值，但有时它们的行为方式与我们不同。

所以我的建议是你应该使用＆＃34; Variables＆＃34;窗口查看所有变量及其值。

Answer 2

将OUTPUT变量传递给过程

时，需要使用关键字OUTPUT

result[j] = (char*) malloc(100);

Answer 3

有效的最终代码。谢谢大家

** Main Procedure **
Exec dbo.usr_GetLastDate @TableName, @LastTransDate OUTPUT
EXEC dbo.usr_GetRecCount @TableName, @RecCount OUTPUT

ALTER PROCEDURE [dbo].[usr_GetLastDate]
    -- Add the parameters for the stored procedure here
    @TableName SYSNAME,
    @OUTDATE date Output
    --<@Param2, sysname, @p2> <Datatype_For_Param2, , int> = <Default_Value_For_Param2, , 0>
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    -- Insert statements for procedure here
   DECLARE @SQLCommand NVARCHAR(MAX) = 
        N'SELECT @OUTDATE=MAX(TRANSDATE) FROM ' + QUOTENAME(@TableName);

   EXECUTE [dbo].[sp_executesql] 
             @sqlCommand, N'@OUTDATE DATE OUTPUT', @OUTDATE=@OUTDATE OUTPUT;

END

ALTER PROCEDURE [dbo].[usr_GetRecCount]
    -- Add the parameters for the stored procedure here
    @TableName SYSNAME,
    @OUTINT int output
    --<@Param2, sysname, @p2> <Datatype_For_Param2, , int> = <Default_Value_For_Param2, , 0>
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    -- Insert statements for procedure here
   DECLARE @SQLCommand NVARCHAR(MAX) = 
        N'SELECT @OUTINT=COUNT(SYMBOL) FROM ' + QUOTENAME(@TableName);


   EXECUTE [dbo].[sp_executesql] 
             @sqlCommand, N'@OUTINT INT OUTPUT', @OUTINT=@OUTINT OUTPUT;
END

包含表和返回值的变量的动态SQL输出

3 个答案: