如何在sql(Oracle)中更改查询结果的顺序
我使用以下查询:如何在sql(Oracle)中更改查询结果的顺序,sql,Sql,我使用以下查询: SELECT * FROM (SELECT DECODE(om.value, 'NAN', '0', om.value) value, om.date_time, om.name, om.measurement_id FROM ems.Observation o, ems.Observation_Measurement om WHERE o.Observation_Id = om.Observation_Id AND o.co_m
SELECT *
FROM
(SELECT DECODE(om.value, 'NAN', '0', om.value) value,
om.date_time,
om.name,
om.measurement_id
FROM ems.Observation o,
ems.Observation_Measurement om
WHERE o.Observation_Id = om.Observation_Id
AND o.co_mod_asset_id =1240
AND om.measurement_id IN (2109,2110)
ORDER BY om.DATE_TIME DESC
)
WHERE rownum <= 8
向查询中添加以下
order by
:
order by date_time desc, measurement_id
这假设两个测量值的date\u time
值完全相同,因为它们似乎在提供的输出中
实际上,您也可以在内部查询中将、measurement\u id
添加到order by
order by date_time desc, measurement_id