手動操作mysql語句

添加字段：ALTER TABLE xxx ADD COLUMN column_name TINYINT(2) DEFAULT 0 NOT NULL COMMENT "客服編號位置ID" AFTER `column_name2`;

mysql -uxxx -p -hdb.xxx.com
use xxx
show tables;

//查看存儲的引擎
show table status from db_name where name='table_name';
show create table t4

show full processlist
查看當前的MySQL資源佔有量