Question

I have this MySQL query here which works GREAT! There is one extra thing I need to do though. Currently, it is returning the highest percentage back. The highest percentage is based on the amount of occurrences that a particular record type has been generated in the database on a particular date. What I want it to do is also return the name of the associated record that has this high percentage. I've tried incorporating it into the query below but it seems to be always failing. Any advice on this would be awesome.

SELECT *, COALESCE((acknowledged / generated), 0) AS result
FROM    (
    SELECT  (
        SELECT      COUNT(*)
        FROM        logs
        INNER JOIN  generated_logs
        ON          generated_logs.log_fk = logs.log_pk 
        WHERE       logs.department_fk = ?
        AND         DATE(generated_logs.generated_time) = ?
    ) AS generated, (
    SELECT      COUNT(generated_logs.log_fk) AS magnitude 
    FROM        logs
    INNER JOIN  generated_logs
    ON          generated_logs.log_fk = logs.log_pk
    WHERE       logs.department_fk = ?
    AND         generated_logs.acknowledged = 1
    AND         DATE(generated_logs.generated_time) = ?
    GROUP BY    generated_logs.log_fk
    ORDER BY    magnitude DESC
    LIMIT 1         
    ) AS acknowledged ) AS result

Current output is:

+-----------+--------------+--------+
| Generated | Acknowledged | Result |
+-----------+--------------+--------+
|     6     |       3      |  0.50  |
+-----------+--------------+--------+

What I need is:

+-----------+--------------+--------+----------+
| Generated | Acknowledged | Result |   Name   |
+-----------+--------------+--------+----------+
|     6     |       3      |  0.50  | Test Log |
+-----------+--------------+--------+----------+

The name is a field in the logs table.

Was it helpful?

Solution

One more try ...

SELECT *, COALESCE((a.magnitude / g.generated), 0) AS result
   FROM
       (
           SELECT      COUNT(*) AS generated
           FROM        logs
           INNER JOIN  generated_logs
           ON          generated_logs.log_fk = logs.log_pk 
           WHERE       logs.department_fk = ?
           AND         DATE(generated_logs.generated_time) = ?
       ) AS g,
       (
            SELECT COUNT(generated_logs.log_fk) AS magnitude, logs.name
            FROM        logs
            INNER JOIN  generated_logs
            ON          generated_logs.log_fk = logs.log_pk
            WHERE       logs.department_fk = ?
            AND         generated_logs.acknowledged = 1
            AND         DATE(generated_logs.generated_time) = ?
            GROUP BY    generated_logs.log_fk
            ORDER BY    magnitude DESC
            LIMIT 1 
       ) AS a
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