如何获取MySQL数据库表的大小?

问题描述

我可以运行这个查询来获取 MySQL 数据库中所有表的大小:

I can run this query to get the sizes of all tables in a MySQL database:

show table status from myDatabaseName;

我需要一些帮助来理解结果.我正在寻找最大尺寸的桌子.

I would like some help in understanding the results. I am looking for tables with the largest sizes.

我应该看哪一栏?

推荐答案

您可以使用此查询来显示表的大小(尽管您需要先替换变量):

You can use this query to show the size of a table (although you need to substitute the variables first):

SELECT 
    table_name AS `Table`, 
    round(((data_length + index_length) / 1024 / 1024), 2) `Size in MB` 
FROM information_schema.TABLES 
WHERE table_schema = "$DB_NAME"
    AND table_name = "$TABLE_NAME";

或者这个查询列出每个数据库中每个表的大小，最大的在前:

or this query to list the size of every table in every database, largest first:

SELECT 
     table_schema as `Database`, 
     table_name AS `Table`, 
     round(((data_length + index_length) / 1024 / 1024), 2) `Size in MB` 
FROM information_schema.TABLES 
ORDER BY (data_length + index_length) DESC;

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