MySQL数据容量查询

• ​​1. 各数据库容量​​
• ​​2. 指定数据库各表容量​​
• ​​3. 指定数据库容量​​
• ​​4. 各数据库表容量​​

参考文档: ​

​information_schema​

​ 这里面存放着数据库各表基本信息

1. 各数据库容量

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;      

2. 指定数据库各表容量

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 = 'zabbix' 
ORDER BY
  data_length DESC,
  index_length DESC;      

3. 指定数据库容量

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';      

4. 各数据库表容量

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;