Question

我有一个存储过程，它使用以下查询从三个单独的表中获取数据，该查询按预期工作。

如何为每个级别添加一个Count，以便我知道为A.，B。和C.选择了多少项？我尝试添加＆＃34; COUNT(*) AS volume＆＃34;但后来我得到一个错误，一些列引用无效。

BEGIN
    SET NOCOUNT ON;
    SELECT      A.itemID,
                A.title,
                A.sortID,
                CONVERT(VARCHAR(11), A.modDate, 106) AS modDate,
                A.modBy,
                (
                    SELECT      B.itemID,
                                B.parentID,
                                B.title,
                                B.sortID,
                                CONVERT(VARCHAR(11), B.modDate, 106) AS modDate,
                                B.modBy,
                                (
                                    SELECT      C.itemID,
                                                C.parentID,
                                                C.title,
                                                C.sortID,
                                                CONVERT(VARCHAR(11), C.modDate, 106) AS modDate,
                                                C.modBy
                                    FROM        ORG_Nav3 C
                                    WHERE       C.parentID = B.itemID
                                    AND         C.logStatus = 'active'
                                    ORDER BY    C.sortID, C.title
                                    FOR XML PATH('nav3'), ELEMENTS, TYPE
                                )
                    FROM        ORG_Nav2 B
                    WHERE       B.parentID = A.itemID
                    AND         B.logStatus = 'active'
                    ORDER BY    B.sortID, B.title
                    FOR XML PATH('nav2'), ELEMENTS, TYPE
                )
    FROM        ORG_Nav1 A
    WHERE       A.logStatus = 'active'
    ORDER BY    A.sortID, A.title
    FOR XML PATH('nav'), ELEMENTS, TYPE, ROOT('ranks')

END

非常感谢你提供任何帮助，蒂姆。

Answer 1

我认为你可以使用窗口函数得到你想要的东西。请注意，不过每个元素都会重复计数：

SELECT      A.itemID,
            A.title,
            A.sortID,
            CONVERT(VARCHAR(11), A.modDate, 106) AS modDate,
            A.modBy,
            COUNT(*) OVER () as CNT
            (
                SELECT      B.itemID,
                            B.parentID,
                            B.title,
                            B.sortID,
                            CONVERT(VARCHAR(11), B.modDate, 106) AS modDate,
                            B.modBy,
                            COUNT(*) OVER () as CNT
                            (
                                SELECT      C.itemID,
                                            C.parentID,
                                            C.title,
                                            C.sortID,
                                            CONVERT(VARCHAR(11), C.modDate, 106) AS modDate,
                                            C.modBy,
                                            COUNT(*) OVER () as CNT
                                FROM        ORG_Nav3 C
                                WHERE       C.parentID = B.itemID
                                AND         C.logStatus = 'active'
                                ORDER BY    C.sortID, C.title
                                FOR XML PATH('nav3'), ELEMENTS, TYPE
                            )
                FROM        ORG_Nav2 B
                WHERE       B.parentID = A.itemID
                AND         B.logStatus = 'active'
                ORDER BY    B.sortID, B.title
                FOR XML PATH('nav2'), ELEMENTS, TYPE
            )
FROM        ORG_Nav1 A
WHERE       A.logStatus = 'active'
ORDER BY    A.sortID, A.title
FOR XML PATH('nav'), ELEMENTS, TYPE, ROOT('ranks')

SQL Server：如何将Count添加到嵌套的Select查询

1 个答案: