1.查看所有数据库容量大小
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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.tables
group by table_schema
order by sum(data_length) desc, sum(index_length) desc;
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2.查看所有数据库各表容量大小
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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;
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3.查看指定数据库容量大小
例:查看mysql库容量大小
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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.tables
where table_schema= 'mysql' ;
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4.查看指定数据库各表容量大小
例:查看mysql库各表容量大小
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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;
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