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嘿伙计们，我对 SQLplus 相当陌生，目前正试图通过各自的标签名称将值分隔到自己的列中。我已经能够提取过滤掉除请求的标记名称之外的每个标记名称的列，但我需要让每列仅包含相应的标记，而不是 where 子句下的每个标记。

当前迭代

期望的输出：

ts                   40FQ8.MV2      40FQ431.MV2
-------------------- -------------- --------------
13-JUN-21 13:49:22.5 4275           4370
13-JUN-21 13:50:22.5 4275           4370
13-JUN-21 13:51:22.5 4275           4370
13-JUN-21 13:52:22.5 4275           4370
13-JUN-21 13:53:22.5 4275           4370
13-JUN-21 13:54:22.5 4275           4370
13-JUN-21 13:55:22.5 4275           4370
13-JUN-21 13:56:22.5 4275           4370
13-JUN-21 13:57:22.5 4275           4370
13-JUN-21 13:58:22.5 4275           4370
13-JUN-21 13:59:22.5 4275           4370
13-JUN-21 14:00:22.5 4275           4370
13-JUN-21 14:01:22.5 4275           4370
13-JUN-21 14:02:22.5 4275           4370
13-JUN-21 14:03:22.5 4275           4370
13-JUN-21 14:04:22.5 4275           4370
13-JUN-21 14:05:22.5 4275           4370
13-JUN-21 14:06:22.5 4275           4370
13-JUN-21 14:07:22.5 4275           4370
13-JUN-21 14:08:22.5 4275           4370
13-JUN-21 14:09:22.5 4275           4370
13-JUN-21 14:10:22.5 4275           4370
13-JUN-21 14:11:22.5 4275           4370

任何帮助，将不胜感激！

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2 回答 2

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因此，经过一些故障排除后，我能够通过使用 group by 子句和聚合表甚至添加额外的标签来获得我正在寻找的结果。我不确定它是最优雅的解决方案，但它对我有用:)

SELECT
 ts "Timestamp",
 sum(case when name = '40FQ8.MV2' then max else null end) "40FQ8.MV2",
 sum(case when name = '40FQ431.MV2' then max else null end) "40FQ431.MV2",
 sum(case when name = '40FQ1103.MV2' then max else null end) "40FQ1103.MV2",
 sum(case when name = '40R1-1_MS.PV' then max else null end) "40R1-1_MS.PV",
 sum(case when name = '40R1-2_MS.PV' then max else null end) "40R1-2_MS.PV",
 sum(case when name = '40R1-3MS.PV' then max else null end) "40R1-3MS.PV",
 sum(case when name = '40R1-1PROG.MV2' then max else null end) "40R1-1PROG.MV2",
 sum(case when name = '40R1-2PROG.MV2' then max else null end) "40R1-2PROG.MV2",
 sum(case when name = '40R1-3PROG.MV2' then max else null end) "40R1-3PROG.MV2"
FROM aggregates
WHERE
    ( name = '40FQ8.MV2' OR
      name = '40FQ431.MV2' OR
      name = '40FQ1103.MV2' OR
      name = '40R1-1_MS.PV' OR
      name = '40R1-2_MS.PV' OR
      name = '40R1-3MS.PV' OR
      name = '40R1-1PROG.MV2' OR
      name = '40R1-2PROG.MV2' OR
      name = '40R1-3PROG.MV2' )
 and ts between (getdbtime - 14000) and (getdbtime)
GROUP BY ts
ORDER BY ts

输出：

Timestamp                 40FQ8.MV2    40FQ431.MV2   40FQ1103.MV2   40R1-1_MS.PV   40R1-2_MS.PV    40R1-3MS.PV 40R1-1PROG.MV2 40R1-2PROG.MV2 40R1-3PROG.MV2
-------------------- -------------- -------------- -------------- -------------- -------------- -------------- -------------- -------------- --------------
14-JUN-21 17:04:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:05:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:06:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:07:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:08:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:09:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:10:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:11:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:12:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:13:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:14:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:15:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:16:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:17:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:18:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:19:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:20:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:21:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:22:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:23:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:24:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:25:34.8           4275           4370           4540              6              3              3             30              0              0
14-JUN-21 17:26:34.8           4275           4370           4540              6              3              3             30              0              0
于 2021-06-14T22:30:25.587 回答
0

如果我正确理解了这个问题，那将是这样的：

select 
  ts,
  case when name = '40FQ8.MV2' then value else null end "40FQ8.MV2",
  case when name = '40FQ431.MV2' then value else null end "40FQ431.MV2"
from history
where name in ('40FQ8.MV2', '40FQ431.MV2')
  and ts between (getdbtime - 14000) and (getdbtime)
于 2021-06-13T17:23:39.440 回答