select * from th insert into th (id,name,gender,age) values (1,'honger','nv','20'); begin savepoint a; insert into th (id,name,gender,age) values (2,'yuer','nv','??'); savepoint b; insert into th (id,name,gender,age) values (3,'jietian','???','???'); savepoint c; insert into th (id,name,gender,age) values (4,'zhumo','???','???'); rollback to b; commit; end;