mysql琐碎操作杂记

1、索引相关

查看表索引

show index from `user`

查看sql的执行计划

explain select * from where user

2、存储过程相关

查看存储过程

show procedure status

查看存储过程AAA的ddl

show create procedure AAA

调用存储过程

call AAA()

3、查看数据库的连接情况

show processlist;

4、查看数据库大小

MySQL [information_schema]> select concat(round(sum(DATA_LENGTH/1024/1024), 2),'MB') as data from TABLES where table_schema='db_a';
MySQL [information_schema]> select concat(round(sum(DATA_LENGTH/1024/1024), 2),'MB') as data from TABLES where table_schema='db_b';   
MySQL [information_schema]> select concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as data from TABLES;
select concat(round(sum(DATA_LENGTH/1024/1024),2),'M') from tables where table_schema=’数据库名’ AND table_name=’表名’;
select sum(DATA_LENGTH)+sum(INDEX_LENGTH) from information_schema.tables where table_schema='数据库名';