Question

我发现了很多类似的问题，基本上我需要将所有未被函数聚合的列放在组中。然而，这似乎不起作用。

select UC.executionTime as executionTime,
       UC.aggregationTime as aggregationTime,
       UC.totalTime as totalTime,
       case when UC.numberExecutions <= UD.NUMBEREXECUTIONS then UC.numberExecutions
          else UD.NUMBEREXECUTIONS
          end as numberExecutions,
       (avg(UD.AVERAGETIME)*(count(UD.AVERAGETIME))+avg(UC.executionTime))/((count(UD.AVERAGETIME))+1.0) as averageTime,
       UC.layer as layer,
       UC.domain as domain,
       UC.name as name,
       UC.componentType as componentType,
       UC.operation as operation,
       UC.version as version,
       "UseRateDay" as indicator
  from UCtable as UC, USE_RATE_DAY as UD
  where UC.name=UD.NAME and UC.layer=UD.LAYER 
        and UC.domain=UD.DOMAIN and UC.componentType=UD.COMPONENTTYPE 
        and UC.operation=UD.OPERATION AND UC.version=UD.VERSION and UC.indicator="UseRateDay" and (floor(UC.executionTime/(24*60*60*1000))*(24*60*60*1000) <= UD.EXECUTIONTIME and (ceil(UC.executionTime/(24*60*60*1000)) * (24*60*60*1000))*2 > UD.EXECUTIONTIME)   
  group by executionTime, aggregationTime,totalTime, numberExecutions,layer, domain, componentType, name, operation, version

我在哪里错过了？

Answer 1

您有两个不同的 numberExecutions 列（在案例stmt中使用），每个表中有一个别名为UC和UD。

所以你的小组需要明确列出这两个列：

group by UC.numberExecutions , UD.NUMBEREXECUTIONS , other columns

您目前只包含其中一个numberOecutions in group by子句，因为您没有别名...导致您出现问题。一旦你使用别名，它就会抱怨它所需要的任何其他缺失列。

此外，组中不需要指标列，因为它是静态值。

最重要的是，除了使用它们之外，您应该始终为列添加别名以避免混淆。这只是一个很好的做法。

不是分组声明

1 个答案: