Question

我在oracle中有这个查询，它通过UUID字段产生一个计数，子字符串为1,42 ..这是因为我们在UUID之后附加了额外的字符来表示来自同一个UUID的多个动作。此查询工作正常，问题是，UUID字段还具有17个字符长的android设备ID，而不是UUID具有的42个字符。我怎么能包括这些＆＃34; UUIDs＆＃34;那不是标准的42个字符吗？

select substr(uuid,1,42), count(player_id)
From Play
Where Trunc(Create_Dtime) >= To_Date('2012-mar-01','yyyy-mon-dd')
Group By Substr(Uuid,1,42)
Having Count(*) > 5
Order By Count(Player_Id) Desc

Answer 1

如果你能以某种方式将Android行与其他行区分开来

select
    case when <android-condition> then Substr(Uuid,1,17)
         else Substr(uuid,1,42)
    end
  , count(player_id)
From Play
Where Trunc(Create_Dtime) >= To_Date('2012-mar-01','yyyy-mon-dd')
Group By
    case when <android-condition> then Substr(Uuid,1,17)
         else Substr(uuid,1,42)
    end
Having Count(*) > 5
Order By Count(Player_Id) Desc

SQL - 包含多个子字符串？

1 个答案: