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  • 速查mysql数据大小

    速查mysql数据大小

    # 1、查看所有数据库大小
    mysql> select concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as data_size from information_schema.TABLES;
    +-----------+
    | data_size |
    +-----------+
    | 2085.96MB |
    +-----------+
    1 row in set (0.00 sec)
    # 2、查看指定数据库大小
    mysql>  select table_schema,concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as data_size from information_schema.TABLES where table_schema in ('db_test','dbtest_59') group by table_schema order by data_size desc;
    +--------------+-----------+
    | table_schema | data_size |
    +--------------+-----------+
    | dbtest_59    | 2060.28MB |
    | db_test      | 0.27MB    |
    +--------------+-----------+
    2 rows in set (0.00 sec)
    # 3、查看指定单表大小
    mysql> select table_schema,table_name,concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as data_size from information_schema.TABLES where table_schema='dbtest_59' group by table_name desc order by data_size desc;
    +--------------+---------------------------------+-----------+
    | table_schema | table_name                      | data_size |
    +--------------+---------------------------------+-----------+
    | dbtest_59    | testbl_auto_schedul_studet_info | 2057.00MB |
    | dbtest_59    | testb_admin                     | 2.52MB    |
    | dbtest_59    | testb_rbac_role_user            | 0.38MB    |
    | dbtest_59    | testb_rbac_role_access          | 0.36MB    |
    | dbtest_59    | testb_rbac_role                 | 0.02MB    |
    | dbtest_59    | dy_students_info                | 0.02MB    |
    +--------------+---------------------------------+-----------+
    6 rows in set (0.00 sec)
    # 4、查询数据库大小

    select
    table_schema,concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as data_size,table_name,table_rows from information_schema.TABLES where table_schema IN('dbtest_59') group by table_name order by table_rows desc; mysql> select table_schema,concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as data_size,table_name,table_rows from information_schema.TABLES where table_schema IN('dbtest_59') group by table_name order by table_rows desc; +--------------+-----------+---------------------------------+------------+ | table_schema | data_size | table_name | table_rows | +--------------+-----------+---------------------------------+------------+ | dbtest_59 | 2057.00MB | fudao_auto_schedule_course_info | 1497236 | | dbtest_59 | 2.52MB | fudao_admin | 10406 | | dbtest_59 | 0.38MB | fudao_rbac_role_user | 7778 | | dbtest_59 | 0.36MB | fudao_rbac_role_access | 3534 | | dbtest_59 | 0.02MB | fudao_rbac_role | 70 | | dbtest_59 | 0.02MB | dy_homework_info | 0 | +--------------+-----------+---------------------------------+------------+ 6 rows in set (0.00 sec)
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  • 原文地址:https://www.cnblogs.com/bjx2020/p/9316829.html
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