mysql - SQL-Case When Issue -


i trying sort transaction dates aging policy. when lastdate has been in location greater aging days limit policy should show overage if not within referring current date. here current table:

+---------+------+----------+-------------+ |lastdate | part | location | aging days  | +---------+------+----------+-------------+ 12/1/2016   123    vvv          90 8/10/2017   444    rrr          10 8/01/2017   144    pr           21 7/15/2017   12     rrr          10

here query:

select q.lastdate,  r.part, r.location, a.agingpolicy 'aging days'   opsintranexcel r (nolock) left inventoryaging (nolock) on r.location=a.location left join (select part,max(trandate) lastdate opsintran group      part) q on r.part=q.part

here column want added in:

+---------+------+----------+------------+---------+ |lastdate | part | location | aging days |   age   | +---------+------+----------+------------+---------+  12/1/2016   123     vvv          90       overage  8/10/2017   444     rrr          10       within   8/01/2017   144     pr           21       within  7/15/2017   12      rrr          10       overage

i appreciate help.

i think below code work you

select   q.lastdate,    r.part,    r.location,   a.agingpolicy 'aging days'   'age' =      case        when datediff( day, q.lastdate, getdate() ) > a.agingpolicy 'overage'        else 'within'      end  opsintranexcel r (nolock) left join inventoryaging (nolock) on r.location=a.location left join (     select part,max(trandate) lastdate      opsintran      trantype='ii' , perpost>='201601'      group part) q on r.part=q.part

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