mysql重複クエリを除去するSQL文の基本構想

SELECT R.* FROM trans_flow  R, (SELECT order_no, MAX(status_time) AS status_time FROM trans_flow GROUP BY order_no) S 

WHERE R.order_no = S.order_no AND R.status_time = S.status_time 

ORDER BY R.status_time DESC 



SELECT a.order_no,a.mem_no,c.card_no,c.card_holder,c.bank_name,c.branch_bank_name,a.flag, a.income_type_txt,a.amt,a.create_time FROM account_log a  

JOIN (SELECT b.*,MAX(id) FROM account b GROUP BY b.mem_no) c 

ON DATE_ADD(a.create_time, INTERVAL 7 DAY) < NOW() AND a.`mem_no` = c.mem_no  

ORDER BY a.id DESC 

解決の構想:構造は以下の通りである:type name guest date 1 aa sa 20131101 bb dsf 20131102 aa wew 20131103私はnameグループに従って、date降順に並べたいと思っています.所望の結果は以下の通りである:type name guest date 1 aa wew 20131103 bb dsf 20131102 select R.*from tab R,(select name,max(date)from tab group by name)S where R.name=S.name and R.date=S.date order by R.date desc