SUM CASE MARIADBMySQL optimization - year column grouping - using temporary table, filesortCASE Statement -...

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SUM CASE MARIADB


MySQL optimization - year column grouping - using temporary table, filesortCASE Statement - 1st case is being ignoredCase always returns null?mysql: counting number of tickets which are open per day basisMariaDB: Querying a timestamp partitionHow do I prevent multiple row insert?Rolling SUM with a 30 day rangesum of count in where clause (or having) in the same table with group byUse of null in case expressionTotals on multple case conditions - mySql













0















I am wanting to count the number of users (rows) who have messages.



users - table
message_count - shows how many messages



I am selecting user.message_count without any problem.



SELECT xf_user.message_count,


I then have



SUM(CASE WHEN user.message_count > 0 THEN 1 ELSE 0 END) AS usersWithMessages,


However I'm not getting anything for usersWithMessages



Any advice?









share







New contributor




SQL Noob is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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    0















    I am wanting to count the number of users (rows) who have messages.



    users - table
    message_count - shows how many messages



    I am selecting user.message_count without any problem.



    SELECT xf_user.message_count,


    I then have



    SUM(CASE WHEN user.message_count > 0 THEN 1 ELSE 0 END) AS usersWithMessages,


    However I'm not getting anything for usersWithMessages



    Any advice?









    share







    New contributor




    SQL Noob is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.























      0












      0








      0








      I am wanting to count the number of users (rows) who have messages.



      users - table
      message_count - shows how many messages



      I am selecting user.message_count without any problem.



      SELECT xf_user.message_count,


      I then have



      SUM(CASE WHEN user.message_count > 0 THEN 1 ELSE 0 END) AS usersWithMessages,


      However I'm not getting anything for usersWithMessages



      Any advice?









      share







      New contributor




      SQL Noob is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      I am wanting to count the number of users (rows) who have messages.



      users - table
      message_count - shows how many messages



      I am selecting user.message_count without any problem.



      SELECT xf_user.message_count,


      I then have



      SUM(CASE WHEN user.message_count > 0 THEN 1 ELSE 0 END) AS usersWithMessages,


      However I'm not getting anything for usersWithMessages



      Any advice?







      mysql mariadb case sum





      share







      New contributor




      SQL Noob is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.










      share







      New contributor




      SQL Noob is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.








      share



      share






      New contributor




      SQL Noob is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked 4 mins ago









      SQL NoobSQL Noob

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      SQL Noob is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      SQL Noob is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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