SQL Query: Need order by count, most must be on top, the rest follows

Question

TABLEA

JobCode Job1 Job2 Job3 zip
------- ---- ---- ---- ----------
F       F    S    NULL 90030
F       F    S    NULL 90031
F       F    S    NULL 90031
F              


        

Answer 1

SELECT 
  JobCode, Job1, Job2, Job3, order_jobs.zip
FROM
  jobs
  JOIN (SELECT zip, COUNT(*) AS zipcount FROM jobs GROUP BY zip) ordering 
ON jobs.zip = ordering.zip
ORDER BY zipcount DESC