mysql怎么查询数据库容量

mysql查询数据库容量的方法：1、打开DOS窗口，然后进入mysql的bin目录下；2、执行“SELECT table_schema AS 'shujuku',table_name AS 'biaoming',table_rows AS 'jilushu',TRUNCATE (data_length / 1024 / 1024, 2) ...”语句即可查看所有数据库各表容量。

本教程操作环境：Windows10系统、MySQL5.7版、Dell G3电脑。

mysql怎么查询数据库容量？

MySql查看数据库及表容量大小并排序

MySql查看数据库及表容量并排序查看所有数据库容量

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;

查看所有数据库各表容量

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
ORDER BY
    data_length DESC,
    index_length DESC;

查看指定数据库容量

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 = 'your_table_name';

查看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 = '指定的库名' 
ORDER BY
    data_length DESC,
    index_length DESC;

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