分类 数据库 下的文章

1.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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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, 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

    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.查看指定数据库各表容量大小
例：查看mysql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;