Question

我有一个存储过程，它返回具有完全相同结构的多个结果集（根据通过While循环构建的条件选择相同的数据）。我需要将所有这些结果集作为一个表加载到单个数据集中。最好的方法是什么？我正在使用SQL Server 2012

Alter PROCEDURE proc_GetAllComUserRights
AS
DECLARE @User as nvarchar(50)
DECLARE @RowCount as int
select @Rowcount=count(*) from Com_Users;
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;


    -- Insert statements for procedure here

    While (@Rowcount > 0)
    BEGIN
        Select @Rowcount = @Rowcount - 1;
        Select @User = UserID FROM Com_Users order by UserID desc OFFSET @Rowcount ROWS FETCH NEXT 1 ROWS ONLY;


        Select "UserID" = @User, 
               Com_UserAllRights.UserRightGUID, 
               Com_UserAllRights.KeyName, 
               Com_UserAllRights.SubKey, 
               Com_UserAllRights.RightName, 
               Com_UserAllRights.[Description],
               "Approved" = (Select Count(*) 
                             FROM Com_UserApprovedRights 
                             WHERE Com_UserApprovedRights.UserGUID = com_User.UserGUID 
                             AND Com_UserApprovedRights.UserRightGUID = Com_UserAllRights.UserRightGUID),
               "GroupApproved" = (Select Count(*) 
                                  FROM Com_UserGroupApprovedRights 
                                  WHERE Com_UserGroupApprovedRights.GroupGUID = com_user.GroupGUID
                                  AND Com_UserGroupApprovedRights.UserRightGUID = Com_UserAllRights.UserRightGUID )
        From Com_UserAllRights LEFT OUTER JOIN
            Com_UserApprovedRights as ApprovedRights on Com_UserAllRights.UserRightGUID = ApprovedRights.UserRightGUID Left Outer Join
            (SELECT * FROM Com_users WHERE UserID = @User) Com_User On approvedrights.UserGUID = com_User.UserGUID
    ORDER BY UserID, KeyName, SubKey
    END
END
GO

Answer 1

以下是表变量的解决方案。

Alter PROCEDURE proc_GetAllComUserRights
AS
DECLARE @Result AS TABLE(   UserID      NVARCHAR(50),
                            UserRightGUID   UNIQUEIdentifier,
                            KeyName         NVARCHAR(50),
                            SubKey          NVARCHAR(50),
                            RightName       NVARCHAR(50),
                            Approved        INT,
                            GroupApproved   INT)

DECLARE @User as nvarchar(50)
DECLARE @RowCount as int
select @Rowcount=count(*) from Com_Users;
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;


    -- Insert statements for procedure here

    While (@Rowcount > 0)
    BEGIN
        Select @Rowcount = @Rowcount - 1;
        Select @User = UserID FROM Com_Users order by UserID desc OFFSET @Rowcount ROWS FETCH NEXT 1 ROWS ONLY;

        INSERT INTO @Result
        Select "UserID" = @User, 
               Com_UserAllRights.UserRightGUID, 
               Com_UserAllRights.KeyName, 
               Com_UserAllRights.SubKey, 
               Com_UserAllRights.RightName, 
               Com_UserAllRights.[Description],
               "Approved" = (Select Count(*) 
                             FROM Com_UserApprovedRights 
                             WHERE Com_UserApprovedRights.UserGUID = com_User.UserGUID 
                             AND Com_UserApprovedRights.UserRightGUID = Com_UserAllRights.UserRightGUID),
               "GroupApproved" = (Select Count(*) 
                                  FROM Com_UserGroupApprovedRights 
                                  WHERE Com_UserGroupApprovedRights.GroupGUID = com_user.GroupGUID
                                  AND Com_UserGroupApprovedRights.UserRightGUID = Com_UserAllRights.UserRightGUID )
        From Com_UserAllRights LEFT OUTER JOIN
            Com_UserApprovedRights as ApprovedRights on Com_UserAllRights.UserRightGUID = ApprovedRights.UserRightGUID Left Outer Join
            (SELECT * FROM Com_users WHERE UserID = @User) Com_User On approvedrights.UserGUID = com_User.UserGUID
    ORDER BY UserID, KeyName, SubKey
    END

    SELECT * FROM @Result
END

Answer 2

使用DataSet.Merge。它将指定的DataTable及其架构合并到当前的DataSet中。

如何从存储过程中填充返回多个结果集的DataSet？

2 个答案: