mysql> create table t ( a int auto_increment, b varchar(30), primary key(a) ); mysql> insert into t(a,b) values (0,0) mysql> insert into t(a,b) values (0,0); mysql> select * from t; +---+------+| a | b | +---+------+| 1 | 0 | | 2 | 0 | +---+------+
原文：http://blog.51cto.com/13675040/2114603