Good solution, and excellent use of UNION ALL.

Based on you solution, i would like to provide another approach, that uses one query, and without LIMIT or OFFSET. It simply adds a row number. Though i do not know how mysql treats an ORDER BY clause in a subquery. Anyway, completely untested:

SELECT
    CASE WHEN @rownum <= @row_limit THEN queue_name ELSE 'others' END 
+queue_name,
    SUM(jobs_pend)    jobs_pend,
    SUM(jobs_run)    jobs_run
    (
     SELECT
        @row_num := @row_num+1
        queue_name,
        jobs_pend,
        jobs_run
     FROM
        queues,
        (SELECT @row_num := 0, @row_limit := 5) r
     ORDER BY
        queue_name
    )
GROUP BY
    CASE WHEN @rownum <= @row_limit THEN @rownum ELSE @rownum + 1 END;

[download]

In reply to Re^4: How to add columns with new row name using perl from mysql query? by chacham
in thread How to add columns with new row name using perl from mysql query? by perlanswers

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