Restart mysql:
sudo /etc/init.d/mysql restart;
mysql -uroot -proot <database> #connect to mysql
mysql> use <database>
mysql> show tables;
mysql> select * from <table>;
mysql> delete from <table> where <condition>;
mysql> desc <table>; #表结构
mysql> show variables like '%set%'; #显示数据库使用的编码
mysql> insert into <table> <field> values ('<value>');
mysql> insert into <table> values ('<value1>','<value2>');
mysql> update <table> set <filed> = '<value>';
mysql> select length(<field>) from <table>;#得到字段值当前的长度
mysql> source /home/XX/Documents/XX/Proc/testProc_Usages.sql #MySQL 命令行下执行.sql脚本
mysql> update traffic_stats set query_time = query_time - INTERVAL 5 day;