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标题: 怎么用navicat查看所有数据库各表容量大小 [打印本页]
作者: 飞多多小程序    时间: 2021-3-30 15:16
标题: 怎么用navicat查看所有数据库各表容量大小
1. 查看所有数据库容量大小
  1. select
  2. table_schema as '数据库',
  3. sum(table_rows) as '记录数',
  4. sum(truncate(data_length/1024/1024, 2)) as '数据容量(MB)',
  5. sum(truncate(index_length/1024/1024, 2)) as '索引容量(MB)'
  6. from information_schema.tables
  7. group by table_schema
  8. order by sum(data_length) desc, sum(index_length) desc;
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怎么用navicat查看所有数据库各表容量大小

注意：点击运行，如果出现错误：You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '数据库' at line 1

解决办法：多次点击运行就行


2. 查看所有数据库各表容量大小
  1. select
  2. table_schema as '数据库',
  3. table_name as '表名',
  4. table_rows as '记录数',
  5. truncate(data_length/1024/1024, 2) as '数据容量(MB)',
  6. truncate(index_length/1024/1024, 2) as '索引容量(MB)'
  7. from information_schema.tables
  8. 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

  1. select
  2. table_schema as '数据库',
  3. sum(table_rows) as '记录数',
  4. sum(truncate(data_length/1024/1024, 2)) as '数据容量(MB)',
  5. sum(truncate(index_length/1024/1024, 2)) as '索引容量(MB)'
  6. from information_schema.tables
  7. 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

  1. select
  2. table_schema as '数据库',
  3. table_name as '表名',
  4. table_rows as '记录数',
  5. truncate(data_length/1024/1024, 2) as '数据容量(MB)',
  6. truncate(index_length/1024/1024, 2) as '索引容量(MB)'
  7. from information_schema.tables
  8. where table_schema='mysql'
  9. order by data_length desc, index_length desc;
复制代码








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