小编unn*_*way的帖子

我试图基于某些列在指定的时间范围内连接表.我已经尝试了几种方法并且无法解决这个问题.

我从一个简单的查询开始:

SELECT *
FROM admin.mktdmtunit c
WHERE c.unitid IN ('2756')
AND c.calledofftime between to_timestamp('2012-12-05 05:00:01','yyyy-mm-dd hh:mi:ss') 
    AND to_timestamp('2012-12-06 05:00:00','yyyy-mm-dd hh:mi:ss')

返回1行.

然后我添加另一个表:

 SELECT *
    FROM admin.mktdmtunit c
    INNER JOIN admin.mktmanualdispatch_all mrd 
    ON c.unitid = mrd.unitid
    where c.unitid in ('2756')
    AND (c.calledofftime between to_timestamp('2012-12-05 05:00:01','yyyy-mm-dd hh:mi:ss') 
        and to_timestamp('2012-12-06 05:00:00','yyyy-mm-dd hh:mi:ss')
        OR mrd.effectivetime  between to_timestamp('2012-12-05 05:00:01','yyyy-mm-dd           hh:mi:ss') 
            and to_timestamp('2012-12-06 05:00:00','yyyy-mm-dd hh:mi:ss'))

返回4行,基于mrd表中4个条目的unitid.但这些都与那个日期无关,所以我不希望看到这些信息.

所以我尝试了这个:

SELECT *
FROM admin.mktdmtunit c
where c.unitid in ('2756')
AND c.calledofftime between to_timestamp('2012-12-05 05:00:01','yyyy-mm-dd hh:mi:ss') 
    and to_timestamp('2012-12-06 05:00:00','yyyy-mm-dd …