mysql - Php sql DISTINCT row id without duplicate -

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select distinct buyer,caseid,subject,service s_support   order id desc

result is

buyer               subject          service    caseid abel@gmail.com ---- need ---- other ---- 438613 bani@gmail.com ---- urgent      ---- other ---- 438612 rony@gmail.com ----        ---- other ---- 438611

i want view id in distinct how? wants hide duplicates keep 1 row per buyer/subject/service/case keep row id.

id  buyer               subject          service    caseid 9   abel@gmail.com ---- need ---- other ---- 438613 7   bani@gmail.com ---- urgent      ---- other ---- 438612 6   rony@gmail.com ----        ---- other ---- 438611

the question unclear looking this.

try both of in mysql_query() , keep 1 fits need (if any)

eliminate duplicates , keep lowest id 

     select min(id) id, buyer,caseid,subject,service       s_support       group buyer,caseid,subject,service      order id desc

eliminate duplicates , keep highest id 

     select max(id) id, buyer,caseid,subject,service       s_support       group buyer,caseid,subject,service      order id desc

if not, rewrite question in intelligible manner :)


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