MySQL查看数据库表容量大小

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',
sum(truncate(data_length/1024/1024, 2)) as '数据容量(MB)',
sum(truncate(index_length/1024/1024, 2)) as '索引容量(MB)'
from information_schema.tablesgroup by table_schemaorder by sum(data_length) desc,
 sum(index_length) desc;

2.查看所有数据库各表容量大小

select table_schema as '数据库',
table_name as '表名',
table_rows as '记录数',truncate(data_length/1024/1024, 2) as '数据容量(MB)',
truncate(index_length/1024/1024, 2) as '索引容量(MB)'from information_schema.tables 
order by data_length desc, index_length desc;

3.查看指定数据库容量大小(例如查看mysql的)

select table_schema as '数据库',sum(table_rows) as '记录数',
sum(truncate(data_length/1024/1024, 2)) as '数据容量(MB)',
sum(truncate(index_length/1024/1024, 2)) as '索引容量(MB)'
from information_schema.tableswhere table_schema='mysql';

4.查看指定数据库各表容量大小（mysql库各表容量大小）

select table_schema as '数据库',
table_name as '表名',
table_rows as '记录数',truncate(data_length/1024/1024, 2) as '数据容量(MB)',
truncate(index_length/1024/1024, 2) as '索引容量(MB)'from information_schema.tables 
where table_schema='mysql'order by data_length desc, index_length desc;