MySQL数据库查看相关库、表大小-蒲公英云

MySQL数据库查看相关库、表大小

迷南。 2022-01-26 01:41 476阅读 0赞

查看所有数据库各表容量大小；便于清理内存。清理内存可以语句删除，也可以把不要的表删除再新建，这样没有索引内存，要数据再去做一点，方便快捷

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;

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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.tables
  group by table_schema
  order by sum(data_length) desc, sum(index_length) desc;

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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, 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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查看指定数据库容量大小

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.tables
  where table_schema='mysql';