CODEWITHSUNDEEP
sqlsql-serversyntaxcase
Richard C
Richard C

Reputation: 417

Case Statement on INNER Join

Trying to use CASE statements on a inner join and all I'm getting is syntax errors, anyone got any advice on this?

Here is the code

 SELECT  
    Call_type_ID,
    SUM (staging.dbo.outgoing_measure.ring_time) AS Ring_Time,
    SUM (staging.dbo.outgoing_measure.hold_time) As Hold_Time,
    SUM (staging.dbo.outgoing_measure.talk_time) AS Talk_Time,
    SUM (staging.dbo.outgoing_measure.acw_time) AS ACW_Time,
    COUNT(*) CallCount
FROM outgoing_measure

INNER JOIN datamartend.dbo.Call_Type_Dim ON 
CASE 
WHEN 
CTICallType_ID = 1
AND CTIAgentCallType_ID = 0
AND Abandoned  IS NULL
AND AnsTime > 0
AND CallState IS NULL
THEN Call_Type_ID = 10
WHEN
CTICallType_ID = 1
AND CTIAgentCallType_ID = 0
AND Abandoned  IS NULL
AND AnsTime > 0  
AND CallState = 1
THEN call_Type_id = 11
WHEN 
CTICallType_ID = 1
AND CTIAgentCallType_ID = 0
AND Abandoned = 1
AND AnsTime IS NULL
AND CallState IS NULL
THEN call_type_ID = 12
ELSE call_type_id = 1
END

Group by call_Type_id

This is the first time i've even worked with case statements let alone combining them with a inner join so i'm sorry if i've totally messed up.

The syntax errors im getting are:

Incorrect syntax on the = and WHEN here

THEN Call_Type_ID = 10
WHEN

And incorrect syntax expecting CONVERSION on the GROUP BY

Upvotes: 21

Views: 135389

Answers (2)

WernerW
WernerW

Reputation: 812

It seems like you are trying to create Where-clauses in the case, but you should instead compare the result of the case against Call_Type_ID(or any other field you want) as in the example i wrote below Hope it helps!

Also sometimes i use brackets over my casing to make it easier to see where they start and stop.

INNER JOIN datamartend.dbo.Call_Type_Dim ON 
(CASE 
 WHEN  CTICallType_ID = 1
     AND CTIAgentCallType_ID = 0
     AND Abandoned  IS NULL
     AND AnsTime > 0
     AND CallState IS NULL
     THEN 10
WHEN CTICallType_ID = 1
     AND CTIAgentCallType_ID = 0
     AND Abandoned  IS NULL
     AND AnsTime > 0  
     AND CallState = 1
     THEN 11
WHEN 
     CTICallType_ID = 1
     AND CTIAgentCallType_ID = 0
     AND Abandoned = 1
     AND AnsTime IS NULL
     AND CallState IS NULL
     THEN 12
ELSE 1
END) = Call_Type_ID  -- Insert something here to join on.

Upvotes: 43

Yogesh Patil
Yogesh Patil

Reputation: 1

select * from emp;
select * from dept;

...........................................................................

select Ename,Job,dname,
Case job
when 'Clerk' then 'C'
when 'Salesman' then 'S'
when 'Manager' then 'M'
when 'Analyst' then 'A'
else 'Other'
end  as Demo

from emp inner join dept on emp.deptno=dept.deptno ;

................................................................................

I am considering here table as oracle by default table.

Upvotes: -6

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