How Can I Efficiently Determine Record Counts Across Multiple MySQL Database Tables?

Efficiently Counting Records Across Multiple MySQL Tables

Counting rows across numerous MySQL database tables can be time-consuming. This article offers a streamlined approach.

The following SQL query provides a total row count for all tables within a given database, avoiding individual SELECT COUNT(*) queries for each table:

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

It's important to acknowledge a key limitation. For InnoDB tables, the TABLE_ROWS value is an estimate used for query optimization, not a precise count. To obtain exact counts, using COUNT(*) remains necessary, although this method is computationally more expensive.

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