SQL

Question

这个查询有效

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

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

这样我就可以select所有记录要么从 2017 年 4 月开始，不丢弃，上下文不等于 home

或

从 2017 年 4 月开始，不丢弃，或者上下文 = hospital 和 local = 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)
)

但仍有 Context = Hospital 和 Local = 0 的记录

我测试的时候

 ("CONTEXT" <> 'Home address')

或

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

单独使用，它可以工作，我无法将两者结合起来提供我需要的东西。

我看过这个

第一。

Answer 1

我想你真的想要：

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，则不等于'Home'。所以，它仍然符合 CONTEXT.

的条件

Answer 2

我觉得条件应该是这样的:

...
AND 
(
   ("CONTEXT" <> 'Home address' AND "CONTEXT" <> 'Hospital') 
   OR ("CONTEXT" = 'Hospital' AND "LOCAL" = 1)
)

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

，您得到的结果 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)

有效

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 - 与或组合

SQL - AND OR combination

arcgis