MS SQL chatroom query error

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I have coded a chatroom using asp.net, C# & MS SQL. I have two Dropdowns for selecting Sports and then another for Sorting the chatrooms based on Users online/total users.

It should not repeat the sport twice, which has online users.

Thanks in advance and have a nice day ahead.

What I have tried:

I have coded a chatroom using asp.net, C# & MS SQL. I have two Dropdowns for selecting Sports and then another for Sorting the chatrooms based on Users online/total users.

<b>When I select "All sports" (default value) and total users, the query works fine

Posted 29-Sep-16 20:08pm

Bigprey

Updated 11-Oct-16 18:26pm

v16

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Maciej Los 30-Sep-16 4:08am

You should post sample data...

Bigprey 30-Sep-16 5:30am

Now, you could find the data. I have elaborated further details in the question now.
Thanks and have a nice day ahead.

Maciej Los 30-Sep-16 5:36am

Please, improve your question and get expected output in <pre>...here your data...</pre> tags.
Do not forget to add input data (not expected output) to check what's wrong with your queries.
Have a nice day too ;)

David_Wimbley 30-Sep-16 10:06am

Without the raw sample data to run your queries against this might be a bit tricky. Something in your data is obviously different and is why the DISTINCT returns it two times.

Can you post schema/sample data...like the insert statements...so we can run your queries against the DB and replicate? Someone else may be able to eyeball it but its just guessing at what your code is doing without that for me.

Bigprey 1-Oct-16 4:45am

Please check it out now. I have added the Insert queries too and you would find it easy to understand now. Looking forward for your help.

Thanks and have a nice day ahead.

Bigprey 1-Oct-16 4:45am

Please check it out now. I have added the Insert queries too and you would find it easy to understand now. Looking forward for your help.

Thanks and have a nice day ahead.

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Maciej Los · Answer 1 · 2016-10-01T10:21:00

I would try something like that:

SQL

SELECT roo.Sports As Sport, roo.[Name] AS ChatRoomName, COUNT(DISTINCT liu.[LoggedInUserID]) AS OnlineUsers, COUNT(DISTINCT chu.ChatUserLogId) AS TotalUsers
FROM Room AS roo
    LEFT JOIN LoggedInUser AS liu ON roo.RoomID = liu.RoomID
    LEFT JOIN ChatUserLog AS chu ON roo.RoomID = chu.RoomID AND chu.LoggedInTime >= DATEADD(DAY,-1,GETDATE()
GROUP BY roo.Sports, roo.[Name]

For further details, please see:
Visual Representation of SQL Joins[^]
Aggregate Functions (Transact-SQL)[^]
COUNT (Transact-SQL)[^]