手动操作mysql语句

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

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

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

show full processlist
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