-------------- drop table if exists auto_incr_test,auto_incr_test2 -------------- Query OK, 0 rows affected -------------- create table auto_incr_test (id int not null auto_increment, name char(40), timestamp timestamp, primary key (id)) -------------- Query OK, 0 rows affected -------------- insert into auto_incr_test (name) values ("first record") -------------- Query OK, 1 row affected -------------- insert into auto_incr_test values (last_insert_id()+1,"second record",null) -------------- Query OK, 1 row affected -------------- insert into auto_incr_test (id,name) values (10,"tenth record") -------------- Query OK, 1 row affected -------------- insert into auto_incr_test values (0,"eleventh record",null) -------------- Query OK, 1 row affected -------------- insert into auto_incr_test values (last_insert_id()+1,"12","1997-01-01") -------------- Query OK, 1 row affected -------------- insert into auto_incr_test values (12,"this will not work",NULL) -------------- ERROR 1062 at line 15: Duplicate entry '12' for key 1 -------------- replace into auto_incr_test values (12,"twelfth record",NULL) -------------- Query OK, 2 rows affected -------------- select * from auto_incr_test -------------- id name timestamp 1 first record 19980817042654 2 second record 19980817042655 10 tenth record 19980817042655 11 eleventh record 19980817042655 12 twelfth record 19980817042655 5 rows in set -------------- create table auto_incr_test2 (id int not null auto_increment, name char(40), primary key (id)) -------------- Query OK, 0 rows affected -------------- insert into auto_incr_test2 select NULL,name from auto_incr_test -------------- Query OK, 5 rows affected Records: 5 Duplicates: 0 Warnings: 0 -------------- insert into auto_incr_test2 select id,name from auto_incr_test -------------- Query OK, 3 rows affected Records: 5 Duplicates: 2 Warnings: 0 -------------- replace into auto_incr_test2 select id,name from auto_incr_test -------------- Query OK, 5 rows affected Records: 5 Duplicates: 5 Warnings: 0 -------------- select * from auto_incr_test2 -------------- id name 1 first record 2 second record 3 tenth record 4 eleventh record 5 twelfth record 10 tenth record 11 eleventh record 12 twelfth record 8 rows in set -------------- drop table auto_incr_test,auto_incr_test2 -------------- Query OK, 0 rows affected Bye