Solved

return all the messages with profile returned

Posted on 2013-11-03
8
329 Views
Last Modified: 2013-11-08
http://www.experts-exchange.com/Database/MySQL/Q_28283780.html#a39619770
Currently this query returns one row of sender, message_id

| SENDER | MESSAGE_ID |
|--------|------------|
|    abl | 3609276896 |


I would like to see all the rows of messages with profile_id 'abl'

Because when I check results, I have to type select * from a_messages where profile_id='abl'
0
Comment
Question by:rgb192
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
  • 3
8 Comments
 
LVL 49

Expert Comment

by:PortletPaul
ID: 39620408
"nest" the previous query as a subquery, join back to messages via sender (so all sender messages get included), order the results as you like
SELECT
*
FROM (
      SELECT
              m.sender
            , m.message_id
      FROM (
            SELECT
              profile_id
            , min(message_id) AS message_id
            FROM a_messages2
            GROUP BY
              profile_id
           ) AS mn
      INNER JOIN a_messages2 AS m ON mn.message_id =  m.message_id
      WHERE m.profile_id = m.sender
     ) AS CK
INNER JOIN a_messages2 AS m2 ON ck.sender =  m2.sender 
ORDER BY
        m2.profile_id
      , m2.message_id ASC 
;

Open in new window

0
 

Author Comment

by:rgb192
ID: 39620411
Error Code: 1054. Unknown column 'ck.sender' in 'on clause'
0
 
LVL 49

Expert Comment

by:PortletPaul
ID: 39620420
? it works for me
0
DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

 
LVL 49

Expert Comment

by:PortletPaul
ID: 39620425
unchanged query with result displayed
**Query 1**:

    SELECT
    *
    FROM (
          SELECT
                  m.sender
                , m.message_id
          FROM (
                SELECT
                  profile_id
                , min(message_id) AS message_id
                FROM a_messages2
                GROUP BY
                  profile_id
               ) AS mn
          INNER JOIN a_messages2 AS m ON mn.message_id =  m.message_id
          WHERE m.profile_id = m.sender
         ) AS CK
    INNER JOIN a_messages2 AS m2 ON ck.sender =  m2.sender 
    ORDER BY
            m2.profile_id
          , m2.message_id ASC 
    

**[Results][2]**:
    
    | SENDER | MESSAGE_ID | A_MESSAGES_ID | PROFILE_ID | THIS_USER |
    |--------|------------|---------------|------------|-----------|
    |    abl | 3609276896 |            13 |        abl |    staff3 |
    |    abl | 3609276896 |            12 |        abl |    staff3 |
    |    abl | 3609276896 |            10 |        abl |    staff3 |
    |    abl | 3609276896 |             7 |        abl |    staff3 |
    |    abl | 3609276896 |             2 |        abl |    staff3 |
    |    abl | 3609276896 |            16 |        abl |    staff3 |
    |    abl | 3609276896 |            23 |        abl |    staff3 |
    |    abl | 3609276896 |            20 |        abl |    staff3 |
    |    abl | 3609276896 |            25 |        abl |    staff3 |
    |    abl | 3609276896 |            28 |        abl |    staff3 |
    |    abl | 3609276896 |            30 |        abl |    staff3 |
    |    abl | 3609276896 |            32 |        abl |    staff3 |

Open in new window

see: http://sqlfiddle.com/#!9/8efe9/4
0
 
LVL 49

Expert Comment

by:PortletPaul
ID: 39620430
the "alias" CK is defined on line 19

it is then referenced in the next line "ON ck.sender..." see the ck?

perhaps try making the "alias" in lower case, so change line 19 to this:

         ) AS ck
0
 
LVL 49

Accepted Solution

by:
PortletPaul earned 500 total points
ID: 39620435
by the way "ck" is my abbreviation for check

you can choose your own aliases, just change the ck to something you prefer
0
 

Author Closing Comment

by:rgb192
ID: 39629606
lowercase ck works great.
Thanks
0
 

Author Comment

by:rgb192
ID: 39633286
Thanks for your query.

I have a related query where I would want to see all the messages (the messages I sent and received-- not just received)


http://www.experts-exchange.com/Database/MySQL/Q_28288994.html
0

Featured Post

Get Database Help Now w/ Support & Database Audit

Keeping your database environment tuned, optimized and high-performance is key to achieving business goals. If your database goes down, so does your business. Percona experts have a long history of helping enterprises ensure their databases are running smoothly.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

As a database administrator, you may need to audit your table(s) to determine whether the data types are optimal for your real-world data needs.  This Article is intended to be a resource for such a task. Preface The other day, I was involved …
When table data gets too large to manage or queries take too long to execute the solution is often to buy bigger hardware or assign more CPUs and memory resources to the machine to solve the problem. However, the best, cheapest and most effective so…
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
There's a multitude of different network monitoring solutions out there, and you're probably wondering what makes NetCrunch so special. It's completely agentless, but does let you create an agent, if you desire. It offers powerful scalability …

688 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question