mysql磁盘占用查看
2021-10-26 19:33:19    19    0    0
alen

1.查看所有数据库各容量大小

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

4.查看指定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/1024/1024/1024, 2) as '数据容量(GB)',
truncate(index_length/1024/1024/1024, 2) as '索引容量(GB)'
from information_schema.tables
where table_schema='dl_spider'
order by data_length desc, index_length desc;​

 

// 生成指定时间范围内的删表语句
Select CONCAT( 'drop table ', table_name, ';' ) FROM (select table_name,SUBSTRING_INDEX(table_name,'_',-1) as 'c_time' from information_schema.tables where table_schema='dl_spider' and table_name like 'taptap_%' and table_name != 'taptap_cp' having c_time <= '20210725' order by c_time desc ) as tmp;

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