Question

我试图通过使用Order By对下面的查询进行排序。但是当我使用MonthYear字段时，输出结果显示如下，不按最新年份和月份排序。

按月份订单输出。

所以我想按年份和月份的顺序尝试，但我不能这样做，因为联合之后的另一个查询所有行都有不同的字段，即a.created_year。有什么办法可以吗？

SELECT      CONVERT(varchar, A.YEAR) + '/' +  CONVERT(varchar, A.MONTH)AS MonthYear
FROM            PAY_Previous AS A LEFT OUTER JOIN
                         EMPLOYEE_BADGE AS B ON A.EMPLOYEE_NO = B.EMPLOYEE_NO LEFT OUTER JOIN
                         V_EMPLOYEE_PROFILES AS C ON A.EMPLOYEE_NO = C.EMPLOYEE_NO
WHERE   A.EMPLOYEE_NO = '710049' AND      A.FREQUENCY = 2 and (day(getdate())>=28 or month(getdate()) > a.Month or YEAR(getdate()) > A.YEAR )



UNION ALL-

SELECT       CONVERT(varchar, YEAR(A.CREATED_DATE)) + '/' + CONVERT(varchar, A.MONTH) AS MonthYear
FROM            PAY_Current AS A LEFT OUTER JOIN
                         EMPLOYEE_BADGE AS B ON A.EMPLOYEE_NO = B.EMPLOYEE_NO LEFT OUTER JOIN
                         V_EMPLOYEE_PROFILES AS C ON A.EMPLOYEE_NO = C.EMPLOYEE_NO
WHERE   A.EMPLOYEE_NO = '710049'AND  A.FREQUENCY = 2  and (day(getdate())>=28 or month(getdate()) > a.Month or YEAR(getdate()) > A.CREATED_DATE )

ORDER BY YEAR(A.CREATED_DATE) DESC ,A.MONTH DESC

预期产出

Answer 1

将数据保留为数字，直到最后一刻，然后只转换最小的列表进行演示，这样就可以使用数字列来排序结果。

SELECT CONVERT(varchar, d.[YEAR]) + '/' + CONVERT(varchar, d.[MONTH]) AS MonthYear
FROM 
    SELECT
            A.[YEAR] , A.[MONTH]
    FROM PAY_Previous AS A
    LEFT OUTER JOIN EMPLOYEE_BADGE AS B ON A.EMPLOYEE_NO = B.EMPLOYEE_NO
    LEFT OUTER JOIN V_EMPLOYEE_PROFILES AS C ON A.EMPLOYEE_NO = C.EMPLOYEE_NO
    WHERE A.EMPLOYEE_NO = '710049'
    AND A.FREQUENCY = 2
    AND (DAY(GETDATE()) >= 28
    OR MONTH(GETDATE()) > a.Month
    OR YEAR(GETDATE()) > A.YEAR)

    UNION

    SELECT
            YEAR(A.CREATED_DATE) [Year] , A.[MONTH]
    FROM PAY_Current AS A
    LEFT OUTER JOIN EMPLOYEE_BADGE AS B ON A.EMPLOYEE_NO = B.EMPLOYEE_NO
    LEFT OUTER JOIN V_EMPLOYEE_PROFILES AS C ON A.EMPLOYEE_NO = C.EMPLOYEE_NO
    WHERE A.EMPLOYEE_NO = '710049'
    AND A.FREQUENCY = 2
    AND (DAY(GETDATE()) >= 28
    OR MONTH(GETDATE()) > a.Month
    OR YEAR(GETDATE()) > A.CREATED_DATE)
) d
ORDER BY d.[YEAR] DESC, d.[MONTH] DESC

顺便说一下：两年＆＃34;年＆＃34;和＆＃34; MONTH＆＃34;是T-SQL使用的术语，将它们用作列名称不是一个好主意。

如果您需要以可以可靠地重新排序的形式获得结果，那么您可以考虑使用月份数的前导零。 e.g。

CONVERT(varchar(4), d.[YEAR]) + '/' + RIGHT('0' + CONVERT(varchar(2), d.[MONTH]),2) AS MonthYear

哪个看起来像这样（并正确排序）

Answer 2

您可能遇到排序问题，因为您正在使用Created_Date进行排序，但是您在语句之间使用了不同的MonthYear字段。

试试这个：

select MonthYear from (
    SELECT      CONVERT(varchar, A.YEAR) + '/' +  CONVERT(varchar, A.MONTH)AS MonthYear, A.YEAR yr, A.MONTH mon
    FROM            PAY_Previous AS A LEFT OUTER JOIN
                             EMPLOYEE_BADGE AS B ON A.EMPLOYEE_NO = B.EMPLOYEE_NO LEFT OUTER JOIN
                             V_EMPLOYEE_PROFILES AS C ON A.EMPLOYEE_NO = C.EMPLOYEE_NO
    WHERE   A.EMPLOYEE_NO = '710049' AND      A.FREQUENCY = 2 and (day(getdate())>=28 or month(getdate()) > a.Month or YEAR(getdate()) > A.YEAR )

    UNION ALL

    SELECT       CONVERT(varchar, YEAR(A.CREATED_DATE)) + '/' + CONVERT(varchar, A.MONTH) AS MonthYear. YEAR(A.CREATED_DATE)) yr, CONVERT(varchar, A.MONTH) mon
    FROM            PAY_Current AS A LEFT OUTER JOIN
                             EMPLOYEE_BADGE AS B ON A.EMPLOYEE_NO = B.EMPLOYEE_NO LEFT OUTER JOIN
                             V_EMPLOYEE_PROFILES AS C ON A.EMPLOYEE_NO = C.EMPLOYEE_NO
    WHERE   A.EMPLOYEE_NO = '710049'AND  A.FREQUENCY = 2  and (day(getdate())>=28 or month(getdate()) > a.Month or YEAR(getdate()) > A.CREATED_DATE )
    )x

ORDER BY yr DESC, mon DESC

Union Order通过使用不同的字段SQL Server

2 个答案: