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[英]Oracle SQL- Update Query with Case Statement Missing Keyword Error
[英]Oracle SQL- Getting “Distinct” values within a “CASE” query
我在ORACLE SQL中有以下查詢:
Select
Trunc(Cs.Create_Dtime),
Count(Case When Cs.Cs_Listing_Id Like '99999999%' Then (Cs.Player_Id) End) As Sp_Dau,
Count(Case When Cs.Cs_Listing_Id Not Like '99999999%' Then (Cs.Player_Id) End) As Cs_Dau
From
Player_Chkin_Cs Cs
Where
Trunc(Cs.Create_Dtime) >= To_Date('2012-Jan-01','yyyy-mon-dd')
Group By Trunc(Cs.Create_Dtime)
Order By 1 ASC
我在每個計數的“案例”之前添加了“Distinct”。 我只想確保在每種情況下只返回所有不同的player_Ids。 有人可以證實嗎? 謝謝! 這是最后的查詢:
Select
Trunc(Cs.Create_Dtime),
Count(Distinct Case When Cs.Cs_Listing_Id Like '99999999%' Then (Cs.Player_Id) End) As Sp_Dau,
Count(Distinct Case When Cs.Cs_Listing_Id Not Like '99999999%' Then (Cs.Player_Id) End) As Cs_Dau
From
Player_Chkin_Cs Cs
Where
Trunc(Cs.Create_Dtime) >= To_Date('2012-Jan-01','yyyy-mon-dd')
Group By Trunc(Cs.Create_Dtime)
Order By 1 ASC;
一個簡單的測試用例,供您證明count(distinct ...
僅返回不同的值:
11:34:09 HR@vm_xe> select department_id, count(*) from employees group by department_id order by 2 desc;
DEPARTMENT_ID COUNT(*)
------------- ----------
50 45
80 34
100 6
30 6
60 5
90 3
20 2
110 2
40 1
10 1
1
70 1
12 rows selected.
Elapsed: 00:00:00.03
11:34:12 HR@vm_xe> select count(department_id) "ALL", count(distinct department_id) "DISTINCT" from employees;
ALL DISTINCT
---------- ----------
106 11
1 row selected.
Elapsed: 00:00:00.02
11:34:20 HR@vm_xe>
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