Question

我有一种情况需要从'MEMBER'表中提取成员记录。我需要检索姓氏，名字，关系，入职日期，会员ID，电子邮件和网站ID。标准是'P'，siteid为'111'和非空白电子邮件地址的关系，我需要排除两个子集。子集A具有上述所有条件以及用户定义字段ID为26的用户定义字段，用户定义字段值为“否”且输入日期超过6天前。子集B具有相同的主要标准，但是输入日期超过2周，用户定义字段为25，使用的已定义字段值为25.用户定义的字段和值存储在单独的表（MEMBERUDFS）中。会员数据。棘手的部分是，如果用户未设置用户定义字段的值，则MEMBERUDFS表上没有条目。这两个表与memid的键相关联。

这是我到目前为止所做的，并没有排除A组，我没有尝试添加逻辑来排除B组。任何帮助都将不胜感激!!! ：

SELECT MEMBERS.scancode,
    MEMBERS.memid,
    MEMBERS.fname,
    MEMBERS.lname,
    MEMBERS.relationship,
    MEMBERS.STATUS,
    MEMBERS.email,
    MEMBERS.entrydate,
    SITES.sitename
FROM MEMBERS
INNER JOIN SITES ON MEMBERS.siteid = SITES.siteid
LEFT OUTER JOIN MEMBERUDFS ON MEMBERS.memid = MEMBERUDFS.memid
INNER JOIN MEMBERUDFSETUPS ON MEMBERUDFS.udfid = MEMBERUDFSETUPS.udfid
WHERE (MEMBERS.relationship = 'P')
    AND (MEMBERS.email <> '')
    AND (
        MEMBERS.memid NOT IN (
            SELECT MEMBERS_1.memid
            FROM MEMBERS AS MEMBERS_1
            INNER JOIN SITES AS SITES_1 ON MEMBERS_1.siteid = SITES_1.siteid
            LEFT OUTER JOIN MEMBERUDFS AS MEMBERUDFS_1 ON MEMBERS_1.memid = MEMBERUDFS_1.memid
            INNER JOIN MEMBERUDFSETUPS AS MEMBERUDFSETUPS_1 ON MEMBERUDFS_1.udfid = MEMBERUDFSETUPS_1.udfid
            WHERE (MEMBERS_1.relationship = 'P')
                AND (MEMBERS_1.email <> '')
                AND (MEMBERUDFS_1.udfid = '26')
                AND (MEMBERUDFS_1.udfvalue = 'No')
                AND (MEMBERS_1.entrydate < DATEADD(DAY, 6, GETDATE()))
                AND (MEMBERS_1.siteid = @rvSite)
            )
        )
    AND (MEMBERS.siteid = @rvSite)

Answer 1

你能用这种方式改写查询：

SELECT MEMBERS.scancode,
    MEMBERS.memid,
    MEMBERS.fname,
    MEMBERS.lname,
    MEMBERS.relationship,
    MEMBERS.STATUS,
    MEMBERS.email,
    MEMBERS.entrydate,
    SITES.sitename
FROM MEMBERS
INNER JOIN SITES ON MEMBERS.siteid = SITES.siteid
LEFT OUTER JOIN MEMBERUDFS ON MEMBERS.memid = MEMBERUDFS.memid
INNER JOIN MEMBERUDFSETUPS ON MEMBERUDFS.udfid = MEMBERUDFSETUPS.udfid
WHERE (MEMBERS.relationship = 'P')
    AND (MEMBERS.email <> '')
    AND (MEMBERS.siteid = @rvSite)
    AND NOT (MEMBERS.entrydate < DATEADD(DAY, 6, GETDATE()) AND EXISTS
        (SELECT memid FROM MEMBERUDFS WHERE (MEMBERUDFS.udfid = '26') 
         AND (MEMBERUDFS.udfvalue = 'No') 
         AND (MEMBERUDFS.memid = MEMBERS.memid)))

Answer 2

看起来你应该可以在这里使用NOT EXISTS并从主查询中删除UDF表，因为你没有从中选择任何东西。

SELECT MEMBERS.scancode,
    MEMBERS.memid,
    MEMBERS.fname,
    MEMBERS.lname,
    MEMBERS.relationship,
    MEMBERS.STATUS,
    MEMBERS.email,
    MEMBERS.entrydate,
    SITES.sitename
FROM MEMBERS
INNER JOIN SITES ON MEMBERS.siteid = SITES.siteid
WHERE (MEMBERS.relationship = 'P')
    AND (MEMBERS.email <> '')
    AND (MEMBERS.siteid = @rvSite)
    AND NOT EXISTS (
        SELECT  1 
        FROM    MEMBERUDFS AS MEMBERUDFS_1 ON MEMBERS_1.memid = MEMBERUDFS_1.memid
                INNER JOIN MEMBERUDFSETUPS AS MEMBERUDFSETUPS_1 ON MEMBERUDFS_1.udfid = MEMBERUDFSETUPS_1.udfid
        WHERE   MEMBERS.memid = MEMBERUDFS_1.memid 
                AND (MEMBERUDFS_1.udfid = '26')
                AND (MEMBERUDFS_1.udfvalue = 'No')
                AND (MEMBERS.entrydate < DATEADD(DAY, 6, GETDATE()))
    )

SQL通过子查询排除

2 个答案: