[英]Multiple conditions on the same column in the WHERE clause
我有一张像这样的桌子——
RecordID PropertyID PropertyVal
--------------------------------------------------
3215 7 john doe
3215 11 Chicago
3215 13 Business Development Analyst
3216 7 jane doe
3216 11 Chicago
3216 13 Managing Director
3217 7 mike smith
3217 11 Chicago
3217 13 Business Development Analyst
3218 7 john smith
3218 11 Seattle
3218 13 Managing Director
如何返回PropertyID = 13 AND PropertyVal='Business Development Analyst'AND PropertyID = 11 AND PropertyVal = 'Chicago'
的用户姓名。 如何为同一列执行多个 where 子句?
编辑:我需要结果集看起来像这样 -
Name
----
John Doe
Mike Smith
select PropertyVal
from your_table
where PropertyID = 7
and RecordID in
(
select RecordID
from your_table
where (PropertyID = 13 AND PropertyVal='Business Development Analyst')
or (PropertyID = 11 AND PropertyVal = 'Chicago')
group by RecordID
having count(distinct PropertyID) = 2
)
不确定你到底想要什么。 这可能是
...
where (PropertyID = 13 AND PropertyVal='Business Development Analyst')
or (PropertyID = 11 AND PropertyVal = 'Chicago')
要么
...
where PropertyID in (13, 11)
and PropertyVal in ('Business Development Analyst', 'Chicago')
我们可以使用 JOIN 子句...
前任:
SELECT LIST_OF_COLUMNS FROM TBL1 T1 JOIN TBL2 T2
ON T1.COL1=T2.COL1 AND
T1.COL2=T2.COL2 AND
T1.COL3=T2.COL3 AND
T1.COL4=T2.COL4
SELECT LIST_OF_COLUMNS FROM TBL1 T1 JOIN TBL2 T2
ON T1.COL1=T2.COL1 AND
T1.COL2=T2.COL2 AND
T1.COL3=T2.COL3 AND
T1.COL4=T2.COL4
使用 INTERSECT 运算符
select PropertyVal as "Name"
from mytable
where PropertyID=7
and RecordID in
(
select RecordID
from mytable
where PropertyID = 13 AND PropertyVal='Business Development Analyst'
intersect
select RecordID
from mytable
where PropertyID = 11 AND PropertyVal='Chicago'
)
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