Question

此查询有效

SELECT *
FROM ALL
WHERE Date >= '2017-04-04 00:00:00'
AND
CONFIDENCE <> 'Discarded'
AND 
CONTEXT <>'Home'

我希望能够说：并(CONTEXT <> 'Home') OR (CONTEXT = 'Hospital' AND LOCAL = 1)

这样我就可以选择所有记录了从2017年4月起，不得丢弃，其背景不等于家庭

OR

从2017年4月开始，不要丢弃，或者上下文=医院和本地= 1。

我正在使用ArcGIS。我试过这个：

"DATE_ENTER"  >= date '2017-04-04 00:00:00'
AND
"CONFIDENCE" <> 'Discarded'
AND 
(
("CONTEXT" <> 'Home address') OR ("CONTEXT" = 'Hospital' AND "LOCAL" = 1)
)

但仍然有Context = Hospital和Local = 0的记录

当我测试时

 ("CONTEXT" <> 'Home address')

或

("CONTEXT" = 'Hospital' AND "LOCAL" = 1)

单独，它有效，我很难将两者结合起来给我我需要的东西。

我看了一眼 SQL AND OR query

第一

Answer 1

我认为你真的想要：

WHERE Date >= '2017-04-04' AND  -- time component is unnecessary
      CONFIDENCE <> 'Discarded' AND 
      CONTEXT <> 'Home' AND
      (NOT (CONTEXT = 'Hospital' AND LOCAL = 1) )

当CONTEXT = 'Hospital'时，它不等于'Home'。因此，它仍然符合CONTEXT上的条件。

Answer 2

我认为情况应该是这样的：

<Book>
  <Title>Book1</Title>
  <Type>fiction</Type>
  <Cost>9.99</Cost>
</Book>

<Book>
  <Title>Book2</Title>
  <Type>non-fiction</Type>
  <Cost>5.99</Cost>
</Book>

<Book>
  <Title>Book3</Title>
  <Type>fiction</Type>
  <Cost>14.99</Cost>
</Book>

<Book>
  <Title>Book4</Title>
  <Type>non-fiction</Type>
  <Cost>19.99</Cost>
</Book>
...

当您使用... AND ( ("CONTEXT" <> 'Home address' AND "CONTEXT" <> 'Hospital') OR ("CONTEXT" = 'Hospital' AND "LOCAL" = 1) )时，由于第一个条件("CONTEXT" <> 'Home address') OR ("CONTEXT" = 'Hospital' AND "LOCAL" = 1)

，您获得的结果But there are still records with Context = Hospital and Local = 0是正确的

Answer 3

(CONTEXT NOT IN('Hospital' , 'Home') OR (CONTEXT = 'Hospital' AND LOCAL= 1))

Answer 4

WHERE Date >= '2017-04-04' AND  -- time component is unnecessary
  CONFIDENCE <> 'Discarded' AND 
  CONTEXT <> 'Home' AND NOT(CONTEXT = 'Hospital' AND LOCAL = 0)

作品

和

一样

    WHERE Date >= '2017-04-04' AND  -- time component is unnecessary
              CONFIDENCE <> 'Discarded' 
AND
    (
       ("CONTEXT" <> 'Home address' AND "CONTEXT" <> 'Hospital') 
       OR ("CONTEXT" = 'Hospital' AND "LOCAL" = 1)
    )

SQL - AND OR组合

4 个答案: