MySql数据库的操作日志介绍(二)

' 命令可以删除指定编号前的所有日志
　　(3).用purge master logs to before 'YYYY-MM-DD HH24:MI:SS'命令可以删除'YYYY-MM-DD HH24:MI:SS'之前的产生的所有日志
　　(4).可以在my.cnf中指定--expire_logs_days=#，此参数设置了binlog日志的过期天数
　　4.测试案例
　　[mysql@test2]$ mysql -uroot -p
　　Enter password:
　　Welcome to the MySQL monitor. Commands end with ; or g.
　　Your MySQL connection id is 18 to server version: 5.0.26-standard-log
　　Type 'help;' or 'h' for help. Type 'c' to clear the buffer.
　　mysql> use test;
　　Database changed
　　mysql> select * from pet;
　　+----------+--------+---------+------+------------+------------+
　　| name | owner | species | sex | birth | death |
　　+----------+--------+---------+------+------------+------------+
　　| Fluffy | Harold | cat | f | 1993-02-04 | NULL |
　　| Claws | Gwen | cat | m | 1994-03-17 | NULL |
　　| Buffy | Harold | dog | f | 1989-05-13 | NULL |
　　| Fang | Benny | dog | m | 1990-08-27 | NULL |
　　| Bowser | Diane | dog | m | 1979-08-31 | 1995-07-29 |
　　| Chirpy | Gwen | bird | f | 1998-09-11 | NULL |
　　| Whistler | Gwen | bird | NULL | 1997-12-09 | NULL |
　　| Slim | Benny | snake | m | 1996-04-29 | NULL |
　　+----------+--------+---------+------+------------+------------+
　　8 rows in set (0.06 sec)
　　mysql> insert into pet values('hunter','yxyup','cat','f','1996-04-29',null);
　　Query OK, 1 row affected (0.03 sec)
　　mysql> select * from pet;
　　+----------+--------+---------+------+------------+------------+
　　| name | owner | species | sex | birth | death |
　　+----------+--------+---------+------+------------+------------+
　　| Fluffy | Harold | cat | f | 1993-02-04 | NULL |
　　| Claws | Gwen | cat | m | 1994-03-17 | NULL |
　　| Buffy | Harold | dog | f | 1989-05-13 | NULL |
　　| Fang | Benny | dog | m | 1990-08-27 | NULL |
　　| Bowser | Diane | dog | m | 1979-08-31 | 1995-07-29 |
　　| Chirpy | Gwen | bird | f | 1998-09-11 | NULL |
　　| Whistler | Gwen | bird | NULL | 1997-12-09 | NULL |
　　| Slim | Benny | snake | m | 1996-04-29 | NULL |
　　| hunter | yxyup | cat | f | 1996-04-29 | NULL |
　　+----------+--------+---------+------+------------+------------+
　　9 rows in set (0.00 sec)
mysql> update pet set sex='m' where name='hunter';
　　Query OK, 1 row affected (0.00 sec)
　　Rows matched: 1 Changed: 1 Warnings: 0
　　mysql> delete from pet where name='hunter';
　　Query OK, 1 row affected (0.00 sec)
　　[mysql@test2]$ mysqlbinlog log-bin.000002
　　/*!40019 SET @@session.max_insert_delayed_threads=0*/;
　　/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
　　# at 4
　　#080313 7:52:47 server id 1 end_log_pos 98 Start: binlog v 4, server v 5.0.26-standard-log created 080313 7:52:47
　　# Warning: this binlog was not closed properly. Most probably mysqld crashed writing it.
　　# at 98
　　#080313 10:06:26 server id 1 end_log_pos 229 Query thread_id=18 exec_time=0 error_code=0
　　use test;
　　SET TIMESTAMP=1205373986;
　　SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.unique_checks=1;
　　SET @@session.sql_mode=0;
　　/*!C latin1 */;
　　SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8;
　　insert into pet values('hunter','yxyup','cat','f','1996-04-29',null);
　　# at 229
　　#080313 10:07:13 server id 1 end_log_pos 334 Query thread_id=18 exec_time=0 error_code=0
　　SET TIMESTAMP=1205374033;
　　update pet set sex='m' where name='hunter';
　　# at 334
　　#080313 10:07:38 server id 1 end_log_pos 432 Query thread_id=18 exec_time=0 error_code=0
　　SET TIMESTAMP=1205374058;
　　delete from pet where name='hunter';
　　# at 432
　　#080313 10:14:13 server id 1 end_log_pos 532 Query thread_id=18 exec_time=0 error_code=0
　　SET TIMESTAMP=1205374453;
　　create table t1(id int,name char(10));
　　# at 532
　　#080313 10:14:41 server id 1 end_log_pos 625 Query thread_id=18 exec_time=0 error_code=0
　　SET TIMESTAMP=1205374481;
　　alter table t1 add sex char(2);
　　# End of log file
　　ROLLBACK /* added by mysqlbinlog */;
　　/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
　　[mysql@test2]$
　　可以看出，三条DML操作和两条DDL都记录到了binlog中了，而select并没有记录。