小编dba*_*ers的帖子

ORACLE:

 create table t7(c1 number primary key,c2 number);
 insert into t7 values (1,3);
 insert into t7 values (2,4);
 commit;
 update t7 set c1=c1+1;
 commit ;
 select * from t7;

MySQL的:

 create table t7(c1 int primary key,c2 int);
 insert into t7 values (1,3);
 insert into t7 values (2,4);
 select * from t7;
 update t7 set c1=c1+1;
 ERROR 1062 (23000): Duplicate entry '2' for key 'PRIMARY'

为什么MySQL说

update set pk=pk+1 :Duplicate entry '2' for key 'PRIMARY',

ORACLE能做到这一点update set pk=pk+1吗？