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Editorial Team
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Asked: 2026-06-14T09:20:17+00:00

I have a query that works well but has one problem, it displays other

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I have a query that works well but has one problem, it displays other data I don’t want.

The data is the latest of each username.

Here is the query:

SELECT
    l.USER_KEY AS id,
    l.USER_ID AS username, 
    gl1.CHAR_KEY AS char_id,
    gl1.NAME AS charname,
    gl1.GATENUM AS server,
    CONVERT(VARCHAR(20), l.LOGINTIME, 100) AS user_time,
    CONVERT(VARCHAR(20), gl1.OCCUR_TIME, 100) AS char_time
FROM LOG_CONNECT201211 AS gl1
    JOIN game.dbo.CHAR_INFOR AS g --character data
        ON gl1.CHAR_KEY = g.CHAR0_KEY OR gl1.CHAR_KEY = g.CHAR1_KEY OR gl1.CHAR_KEY = g.CHAR2_KEY
    JOIN login.dbo.USER_CHECK_LOGIN AS l --login data
        ON g.USER_KEY = l.USER_KEY
    JOIN (SELECT    char_key, max(OCCUR_TIME) as mostrecent  --game logs
            FROM    LOG_CONNECT201211 
            WHERE   KIND=20 OR KIND=21
            GROUP BY char_key) AS gl2
        ON gl2.char_key = gl1.char_key and gl2.mostrecent = gl1.OCCUR_TIME
WHERE l.CHECKLOGIN = 1
ORDER BY username DESC

That returns:

id      username    char_id name        map user_time           char_time   
------------------------------------------------------------------------------------
3667    zr5970      11002   warpath     4   Nov 15 2012  8:54AM Nov  7 2012  6:31AM
3667    zr5970      11004   bloodfines  4   Nov 15 2012  8:54AM Nov  7 2012  6:33AM
3667    zr5970      11003   hanzhou     1   Nov 15 2012  8:54AM Nov 15 2012  8:54AM
14999   yvacosta    52086   Creams      1   Nov 15 2012  8:17AM Nov 15 2012  8:17AM
23433   yurich      1911481 abal        5   Nov 15 2012  8:34AM Nov  9 2012  4:05PM
23433   yurich      1911482 yurich      5   Nov 15 2012  8:34AM Nov 15 2012  8:30AM
23433   yurich      1911483 sharmaine   5   Nov 15 2012  8:34AM Nov 15 2012  8:35AM
10967   yubiwamoi   33376   Dwina       1   Nov 15 2012  4:33AM Nov 15 2012  4:33AM

So the data is correct, but I only want to return one row per username.

On this data the username returns 3, with 3 names, but the only name I want is that one with the latest char_time.

Example correct data:

id      username    char_id name        map user_time           char_time   
-----------------------------------------------------------------------------------
 3667   zr5970      11003   hanzhou     1   Nov 15 2012  8:54AM Nov 15 2012  8:54AM
14999   yvacosta    52086   Creams      1   Nov 15 2012  8:17AM Nov 15 2012  8:17AM
23433   yurich      1911483 sharmaine   5   Nov 15 2012  8:34AM Nov 15 2012  8:35AM
10967   yubiwamoi   33376   Dwina       1   Nov 15 2012  4:33AM Nov 15 2012  4:33AM

Notice that I only displayed the data for zr5970 with the latest char_time

Please advice, Thank you.

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1 Answer

  1. Editorial Team

    Use ROW_NUMBER()

    SELECT *
FROM
(
SELECT
    l.USER_KEY AS id,
    l.USER_ID AS username, 
    gl1.CHAR_KEY AS char_id,
    gl1.NAME AS charname,
    gl1.GATENUM AS server,
    CONVERT(VARCHAR(20), l.LOGINTIME, 100) AS user_time,
    CONVERT(VARCHAR(20), gl1.OCCUR_TIME, 100) AS char_time,
    rn = row_number() over (partition by l.USER_KEY order by gl1.OCCUR_TIME DESC)
FROM LOG_CONNECT201211 AS gl1
    JOIN game.dbo.CHAR_INFOR AS g --character data
        ON gl1.CHAR_KEY = g.CHAR0_KEY OR gl1.CHAR_KEY = g.CHAR1_KEY OR gl1.CHAR_KEY = g.CHAR2_KEY
    JOIN login.dbo.USER_CHECK_LOGIN AS l --login data
        ON g.USER_KEY = l.USER_KEY
WHERE l.CHECKLOGIN = 1
) X
WHERE rn=1
ORDER BY username DESC
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