.查询所有数据库占用磁盘空间大小 select TABLE_SCHEMA, concat(,),' MB') as data_size, concat(,),'MB') as index_size from information_schema.tables group by TABLE_SCHEMA ORDER BY data_size desc; .查询单个库中所有表磁盘占用大小 select TABLE_NAME, concat(,),' MB') as data_size, concat…
本文介绍MySQL查看数据库表容量大小的命令语句,提供完整查询语句及实例,方便大家学习使用. 1.查看所有数据库容量大小 select table_schema as '数据库', sum(table_rows) as '记录数', , )) as '数据容量(MB)', , )) as '索引容量(MB)' from information_schema.tables group by table_schema order by sum(data_length) desc, sum(index…
1.查看数据库表数量SELECT count(TABLE_NAME) FROM information_schema.TABLES WHERE TABLE_SCHEMA='dbname'; select count(*) tables ,table_schema from information_schema.tables where table_schema='work_ad' group by table_schema;…
查询某个表所占用的磁盘空间大小: SELECT CONCAT(ROUND(SUM(data_length/1024/1024),2),'MB') AS data_length_MB, CONCAT(ROUND(SUM(index_length/1024/1024),2),'MB') AS index_length_MB FROM `information_schema`.tables WHERE table_schema='db_name' AND table_name = 'table_nam…
select TABLE_NAME, concat(truncate(data_length/1024/1024,2),' MB') as data_size, concat(truncate(index_length/1024/1024,2),' MB') as index_size from information_schema.tables where TABLE_SCHEMA = '库名' group by TABLE_NAME order by data_length desc;…
查看数据库表基本信息. select * from information_schema.TABLES where information_schema.TABLES.TABLE_SCHEMA = '数据库名' and information_schema.TABLES.TABLE_NAME = '表名'; 查看mysql数据库大小 SELECT sum(DATA_LENGTH)+sum(INDEX_LENGTH) FROM information_schema.TABLES where TAB…
#查看每个数据库所占磁盘大小 SELECT TABLE_SCHEMA AS "库名", , ) AS "表所占空间(MB)", , ) AS "索引所占空间(MB)", ,) AS "空间累计(MB)" FROM information_schema.`TABLES` GROUP BY `TABLE_SCHEMA`; #查看某个数据库各表所占磁盘大小 SELECT TABLE_NAME, , ) AS "DATA_…
1.查看数据库表数量SELECT count(TABLE_NAME) FROM information_schema.TABLES WHERE TABLE_SCHEMA='dbname'; 2.获取mysql下所有数据库表的数量 SELECT COUNT(*) TABLES, table_schema FROM information_schema.TABLES GROUP BY table_schema; 3.获取指定数据库的表的数量 SELECT COUNT(*) TABLES, tabl…
要想知道每个数据库的大小的话,步骤如下: 1.进入information_schema 数据库(存放了数据库的信息) use information_schema; 2.查询所有数据库的大小: select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables; 3.查看指定数据库的大小: 比如查看数据库home的大小 select concat(round(sum(data_length/1024/1024),…
由于数据太大了.所以MYSQL需要瘦身,那前提就是需要知道每个表占用的空间大小. 首先打开指定的数据库: use information_schema; 如果想看指定数据库中的数据表,可以用如下语句: ),),'MB') as data from TABLES where table_schema='AAAA' and table_name='BBBB'; 如果想看数据库中每个数据表的,可以用如下语句: ,), 'MB') as data FROM TABLES WHERE TABLE_SCHE…
1:show databases; 查看所有的数据库,等同于select schema_name from information_schema.schemata\G.\G 替换;,以纵向报表的形式输出结果,有利于阅读. 2. status 查看mysql数据库的运行状态 3. use 命令选择数据库 例如 use information_schema,当使用此命令后 select schema_name from information_schema.schemata\G,可以为 select…
一.增加远程连接用户 1.用root权限登录数据库 2.加用户:grant all privileges on *.* to '111'@'192.168.1.%' identified by '222' with grant option; 其中111为账户,222为:密码 允许的远程IP段位:192.168.1.* 3.删除远程连接用户:drop user '111'@192.168.1.%'; 或 drop user 111@192.168.1.1; 二.查看数据表结构…
要想知道每个数据库的大小的话,步骤如下: 1.进入information_schema 数据库(存放了其他的数据库的信息) use information_schema; 2.查询所有数据的大小: select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables; 3.查看指定数据库的大小: 比如查看数据库home的大小 select concat(round(sum(data_length/1024/1024…
一.查询所有数据库占用空间大小 SELECT TABLE_SCHEMA, CONCAT( TRUNCATE(SUM(data_length) / 1024 / 1024, 2), ' MB' ) AS data_size, CONCAT( TRUNCATE(SUM(index_length) / 1024 / 1024, 2), 'MB' ) AS index_size FROM information_schema.tables GROUP BY TABLE_SCHEMA ORDER BY d…
查询数据库的占用 SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024), 2), ' MB') AS 'Total Index Size' , CONCAT(ROUND(SUM(data_length)/(1024*1024), 2), ' MB') AS 'Total Data Size' FROM information_schema.TABLES where table_schema like 'edb_a%' ; 查询表的占用 SELECT…