不使用空值的SQL日期筛选

日期筛选不起作用。如果我把所有的参数都取出来，它就不是空的，它工作得很好。如何让IS NOT NULLs和日期筛选一起工作，为什么会出现这种情况？

您需要将

或
条件用括号括起来：

SELECT 
    *
FROM
    dbo.TABLE
LEFT JOIN
    table_insp insp ON TABLE.FORM_NO = insp.FORM_no
WHERE 
    (O_NMBR IS NOT NULL) 
    OR (O_DRCTN IS NOT NULL) 
    OR (O_INCHES IS NOT NULL) 
    OR (o_comments IS NOT NULL)
    AND insp.COMPLETED_DATE >= '10-01-2018' 

我认为您需要做的就是添加括号，如：

SELECT * from dbo.TABLE 
left join table_insp insp on TABLE.FORM_NO =  insp.FORM_no
where ((O_NMBR is not null) 
        OR (O_DRCTN is not null) 
        or (O_INCHES is not null) 
        or (o_comments is not null))
and insp.COMPLETED_DATE >= '10-01-2018';

在
或
条件周围需要括号。我还建议使用标准日期格式：

SELECT * from dbo.TABLE
left join table_insp insp on TABLE.FORM_NO =  insp.FORM_no
where (
        (O_NMBR is not null) 
        OR (O_DRCTN is not null) 
        or (O_INCHES is not null) 
        or (o_comments is not null)
      )
  and insp.COMPLETED_DATE >= '10-01-2018' 

在
或
中添加
（）

where (O_NMBR is not null or O_DRCTN is not null or O_INCHES is not null or o_comments is not null
      ) and
      insp.COMPLETED_DATE >= '2018-10-01'

SELECT * from dbo.TABLE
left join table_insp insp on TABLE.FORM_NO =  insp.FORM_no
where (
(O_NMBR is not null) 
OR (O_DRCTN is not null) 
or (O_INCHES is not null) 
or (o_comments is not null)
)

and insp.COMPLETED_DATE >= '10-01-2018'