使用不同字段SQL Server的联合顺序

我正在尝试使用排序依据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，而不是按最近的年份和月份进行相应排序

按月份排序，每小时输出一次

 MonthYear
    2017/9
    2017/8
    2017/7
    2017/6
    2017/5
    2017/4
    2017/10

因此，我想尝试按顺序按年份和月份，但我不能这样做，因为union all行后的另一个查询具有不同的字段，即a.created_year。我有什么办法可以做吗

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

预期产量

 MonthYear
    2017/10
    2017/9
    2017/8
    2017/7
    2017/6
    2017/5
    2017/4

---

将数据保留为数字，直到最后一刻，然后仅转换最小的列表进行表示，这样就可以将数字列用于对结果进行排序

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

顺便说一句：年和月都是T-SQL使用的术语，使用它们作为列名称不是一个好主意

如果你需要一个可以可靠地重新排序的形式的结果，那么也许你可以考虑使用月数的前导零。e、 g

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

它看起来像这样，并且排序正确

2017/10
2017/04
2017/03
2017/02
2017/01
2016/10
2016/05

---

您可能会遇到排序问题，因为您使用的是Created_Date进行排序，但在语句之间使用的MonthYear字段不同

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

---

对于pay_当前表，使用[year]，它应该是a。创建了你的日期。好的，我修正了，谢谢。我相信即使没有更正，您也会遵循一般建议。太好了，请点击勾号接受。这对其他人意味着，tere是一种解决方案，既能帮助那些寻找答案的人，也能帮助那些寻找仍有待解决的问题的人。