How to join multi tables with case statement?

Question

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How to get data from multiple tables with case on one table, I tried like below but getting error.

What I have tried:

SQL

select login.UserNname,LastLoggedInDetails.LoggedInIP,UserType.UserType,LastLoggedInDetails.LoggedInTime,
LastLoggedInDetails.LoggedOutTime,LastLoggedInDetails.LoggedInVersion,CompanyRegistered.Comp_Name,

case 

<pre>when LastLoggedInDetails.LoggedOutTime is not null then CONVERT(VARCHAR(100),DATEDIFF (hour,LastLoggedInDetails.LoggedInTime ,LastLoggedInDetails.LoggedOutTime ))+' Hours '+ 
CONVERT(VARCHAR(100),DATEDIFF (minute,LastLoggedInDetails.LoggedInTime ,LastLoggedInDetails.LoggedOutTime )%60) +' Minutes' as Duration

when LastLoggedInDetails.LoggedOutTime is null then 'Running...' as Duration
end

from LastLoggedInDetails
join login on LastLoggedInDetails.LastLoggedUserId = login.RegistrationId
join UserType on LastLoggedInDetails.LastLoggedUserTypeId = UserType.UserTypeId
join CompanyRegistered on LastLoggedInDetails.RegCompanyId = CompanyRegistered.Comp_Id

Posted 2-Mar-16 3:32am

Dawood507

Updated 2-Mar-16 3:53am

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Comments

CHill60 2-Mar-16 9:40am

"but getting error" - what error?

ZurdoDev 2-Mar-16 9:53am

Just fix the error. What's the issue?

ZurdoDev 2-Mar-16 9:54am

By the way, your title is misleading. You say you want to join using a case statement. Your case statement is not in the join.

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CHill60 · Accepted Answer · 2016-03-02T03:53:00

The naming of the column duration has to come after the END of the CASE statement

SQL

case when LastLoggedInDetails.LoggedOutTime is not null then 
    CONVERT(VARCHAR(100),DATEDIFF(hour,LastLoggedInDetails.LoggedInTime ,LastLoggedInDetails.LoggedOutTime ))+' Hours '+ 
	CONVERT(VARCHAR(100),DATEDIFF (minute,LastLoggedInDetails.LoggedInTime ,LastLoggedInDetails.LoggedOutTime )%60) +' Minutes'
 
when LastLoggedInDetails.LoggedOutTime is null then 'Running...' 
end as Duration