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[英]SQL select all non-unique rows that have at least one specific value in another column
[英]Select all rows that have at least a list of features
我有EXPERIMENTAL_RUNS(runId),每个都有与之关联的任意数量的SENSORS(sensorId)。 考虑到这一点,我有一个RS表加入这两个:
==========
RS
==========
runId, sensorId
因此,如果runId = 1的运行具有sensorId = 1,sensorId = 6,sensorId = 8的传感器,则RS表中将有3个条目:(runId = 1,sensorId = 1)(runId = 1,sensorId = 6)(runId = 1,sensorId = 8)
这真的是我将如何返回所有具有传感器{11,13,15}的EXPERIMENTAL_RUNS吗? 从我读过的内容来看,我似乎想要的是一个嵌套的散列连接......这会发生什么?
SELECT a.runId
FROM rs a, rs b, rs c
WHERE
a.runId=b.runId AND
b.runId=c.runId AND
a.sensorId=11 AND
a.sensorId=13 AND
b.sensorId=15
为了澄清,我想只返回具有传感器11和13和15的EXPERIMENTAL_RUNS。
假设runId, sensorId
有独特rs
表,这将发现runId
S作所有3 sensorId
S:
SELECT runId, COUNT(c) ct
FROM rs
WHERE sensorId IN (11, 13, 15)
GROUP BY runId
HAVING ct = 3
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