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  • 【MySQL】数据库和数据表的数据量大小统计查询

    1.查看所有库的大小

    select
    concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as ALL_DB_DATA_SIZE,
    concat(round(sum(INDEX_LENGTH/1024/1024),2),'MB') as ALL_DB_INDEX_SIZE,
    concat(round(sum((DATA_LENGTH + INDEX_LENGTH)/1024/1024),2),'MB') as ALL_DB_TOTAL_SIZE
    from information_schema.TABLES;

    2.查看所有库的大小排名

    select
    table_schema as DB_NAME,
    concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as DB_DATA_SIZE,
    concat(round(sum(INDEX_LENGTH/1024/1024),2),'MB') as DB_INDEX_SIZE,
    concat(round(sum((DATA_LENGTH + INDEX_LENGTH)/1024/1024),2),'MB') as DB_TOTAL_SIZE
    from information_schema.TABLES
    group by table_schema
    order by sum(DATA_LENGTH + INDEX_LENGTH) desc ;

    3.查看指定库的表的大小排名

     例如:查询lei_user库的用户量

    select
    table_name as TABLE_NAME,
    table_rows AS ROW_NUM,
    concat(round(DATA_LENGTH/1024/1024,2),'MB') as TABLE_DATA_SIZE,
    concat(round(INDEX_LENGTH/1024/1024,2),'MB') as TABLE_INDEX_SIZE,
    concat(round((DATA_LENGTH + INDEX_LENGTH)/1024/1024,2),'MB') as TABLE_TOTAL_SIZE
    from information_schema.TABLES
    where table_schema='lei_user'
    order by (DATA_LENGTH + INDEX_LENGTH) desc;

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  • 原文地址:https://www.cnblogs.com/july-sunny/p/14852215.html
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