Question

This is based on my previous question.

I have the following table

Table1

JobPositionId | JobPositionName
     1        |      Sound
     2        |      Lights
     3        |      Sound
     4        |      Ground

How can I delete row three (Name = sound, and max position)

Answer 1

Use:

DELETE FROM TABLE t1 
       JOIN (SELECT x.jobpositionname,
                    MAX(jobPositonId) AS max_id 
               FROM TABLE x
           GROUP BY x.jobpositionname) t2 
 WHERE t1.jobPositonId  = t2.max_id
   AND t1.jobpositionname = t2.jobpositionname
   AND t2.jobpositionname = 'Sound'

As I mentioned in your previous question, using this won’t trigger a MySQL 1093 error:

DELETE FROM TABLE
 WHERE JobPositionId = SELECT x.id
                         FROM (SELECT MAX(JobPositionId) AS id
                                 FROM TABLE
                                WHERE JobPositionName = 'Sound') x