标签：l命令 -- orm schema weight inf IV form 结果
mysql> mysql> use information_schema ; /*切换到information_schema数据下*/ Database changed mysql> mysql> select concat(round(sum(data_length/1024/1024),2),‘MB‘) as data from tables; /*查询所有数据大小*/ +----------+ | data | +----------+ | 123.68MB | +----------+ 1 row in set (0.36 sec) mysql> select concat(round(sum(data_length/1024/1024),2),‘MB‘) as data from tables where table_schema=‘hrkip‘; /*查询数据库名称为“hrkip”的数据大小*/ +--------+ | data | +--------+ | 8.65MB | +--------+ 1 row in set (0.00 sec) mysql> select concat(round(sum(data_length/1024/1024),2),‘MB‘) as data from tables where table_schema=‘hrkip‘ and table_name=‘jx_lsjl‘ ; /*查询数据库名称为“hrkip”，表名为“ jx_lsjl”的数据大小*/ +--------+ | data | +--------+ | 6.77MB | +--------+ 1 row in set (0.00 sec)
备注 ：
data_length ：存储数据大小
data_length/1024/1024：将字节转换为MB
round(sum(data_length/1024/1024),2)：取两位小数
concat(round(sum(data_length/1024/1024),2),‘MB‘) ：给计算结果追加单位 “MB”
标签：l命令 -- orm schema weight inf IV form 结果
原文地址：https://www.cnblogs.com/weifeng1463/p/9222047.html
