SELECT * FROM (SELECT T.*, ROW_NUMBER() OVER(PARTITION BY T.AREA_CODE ORDER BY ROWNUM) CN FROM TT_AREA T) WHERE CN = 1;
Oracle 分组查询取第一条记录 ROW_NUMBER() OVER
猜你喜欢
转载自xinjiatao.iteye.com/blog/2170920
今日推荐
周排行