获取MySQL数据库中所有表的记录计数 [英] Get record counts for all tables in MySQL database

问题描述

是否可以在不对每个表运行SELECT count()的情况下获取MySQL数据库中所有表的行数?

Is there a way to get the count of rows in all tables in a MySQL database without running a SELECT count() on each table?

推荐答案

SELECT SUM(TABLE_ROWS) 
     FROM INFORMATION_SCHEMA.TABLES 
     WHERE TABLE_SCHEMA = '{your_db}';

文档中的注释:对于InnoDB表中，行数只是SQL优化中使用的粗略估计.您需要使用COUNT(*)进行精确计数(这比较昂贵).

Note from the docs though: For InnoDB tables, the row count is only a rough estimate used in SQL optimization. You'll need to use COUNT(*) for exact counts (which is more expensive).

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