Question

我已经阅读了一些资源，例如本网站Are brackets in the WHERE clause standard sql上的帖子。但是，我仍然无法使所有 where过滤器正常工作。

运行以下代码时，我的结果仍然返回包含除我尝试过滤的值以外的值的记录。

我正在尝试返回所有具有（1）PT_ACUITY等于3 - Two+ Resources且也具有（2）Track_Group equaling 'ED Tracking Group'和（3）其{{1 }}属于state和end date变量，（4）也不具有包含任何通配符项的CHECKIN_DATE_TIME。

我希望返回的记录满足所有四个参数。谢谢！

REASON_FOR_VISIT

Answer 1

首先，对查询进行格式化将使其更具可读性，并且更易于可视化和剖析。

如果我理解您的问题。

WHERE  TRACK_GROUP = 'ED Tracking Group'
  AND  PT_ACUITY='3 - Two+ Resources'
  AND  CHECKIN_DATE_TIME > @StartDate 
  AND  CHECKIN_DATE_TIME < @EndDate
  AND  (    REASON_FOR_VISIT Not Like '%asthma%' 
        AND REASON_FOR_VISIT Not Like '%psych%' 
        AND REASON_FOR_VISIT Not Like '%suicide%' 
        AND REASON_FOR_VISIT Not Like '%suicidal%' 
        AND REASON_FOR_VISIT Not Like '%homicide%' 
        AND REASON_FOR_VISIT Not Like '%homicidal%' 
        AND REASON_FOR_VISIT Not Like '%FD-12%' 
        AND REASON_FOR_VISIT Not Like '%behavioral%' 
        AND REASON_FOR_VISIT Not Like '%overdose%' 
        AND REASON_FOR_VISIT Not Like '%aggression%' 
       )

Answer 2

仅基于您的WHERE子句，您可能不需要任何括号，但是我将它们分组为这样：

WHERE 
(TRACK_GROUP = 'ED Tracking Group' AND  PT_ACUITY='3 - Two+ Resources' 
AND CHECKIN_DATE_TIME > @StartDate and CHECKIN_DATE_TIME < @EndDate)
 AND (REASON_FOR_VISIT Not Like '%asthma%'
 AND REASON_FOR_VISIT Not Like '%psych%' 
 AND REASON_FOR_VISIT Not Like '%suicide%' 
 AND REASON_FOR_VISIT Not Like '%suicidal%' 
 AND REASON_FOR_VISIT Not Like '%homicide%' 
 AND REASON_FOR_VISIT Not Like '%homicidal%' 
 AND REASON_FOR_VISIT Not Like '%FD-12%' 
 AND REASON_FOR_VISIT Not Like '%behavioral%' 
 AND REASON_FOR_VISIT Not Like '%overdose%' 
 AND REASON_FOR_VISIT Not Like '%aggression%')

您的问题是所有这些OR都在其中

Answer 3

如果您希望变量@x不等于1或2，则可以编写

@X <> 1和@X <> 2

但是如果你写

@X <> 1或@X <> 2

那么对于任何数字都将是真实的，因此，如果@X为1，则后半部分是真实的，从而使整个事实正确

WHERE TRACK_GROUP = 'ED Tracking Group' AND  PT_ACUITY='3 - Two+ Resources' AND CHECKIN_DATE_TIME > @StartDate and CHECKIN_DATE_TIME < @EndDate 
    AND 
        (REASON_FOR_VISIT Not Like '%asthma%'   --it needs to be NOT like any of these, so all the conditions have to be true
     AND REASON_FOR_VISIT Not Like '%psych%')   --that is to say, each of the conditions is NOT like the value in quotes
     AND REASON_FOR_VISIT Not Like '%suicide%' 
     AND REASON_FOR_VISIT Not Like '%suicidal%'
     AND REASON_FOR_VISIT Not Like '%homicide%'
     AND REASON_FOR_VISIT Not Like '%homicidal%'
     AND REASON_FOR_VISIT Not Like '%FD-12%'
     AND REASON_FOR_VISIT Not Like '%behavioral%'
     AND REASON_FOR_VISIT Not Like '%overdose%'
     AND REASON_FOR_VISIT Not Like '%aggression%' )

括号放在Where语句中

3 个答案: