oracle 同一组数据同一序号 递增 怎么实现 实现前的数据 实现后的数据...答:CREATE TABLE ttt (ID NUMBER, dzid VARCHAR2(10), gid NUMBER);INSERT INTO ttt (ID,dzid) VALUES(1,'A');INSERT INTO ttt (ID,dzid) VALUES(2,'A');INSERT INTO ttt (ID,dzid) VALUES(3,'B');INSERT INTO ttt (ID,dzid) VALUES(4,'C');INSERT INTO ttt (ID,dzid) VALUES...