How Many Rows Can You Store In MySQL Databases?

What is the max rows a MySQL database can store per table?

Welcome to our blog, where we make MySQL easy to understand. Today, we’re tackling a common question: how many rows can a MySQL table hold? Let’s explore, focusing on the primary key.

Understanding MySQL Row Limits:

In MySQL, the number of rows a table can store depends on the primary key. Here’s the breakdown:

  1. Unsigned INT: If your primary key is an unsigned INT, your table can store up to 4,294,967,295 rows. That’s a big number and works well for many projects.
  2. Unsigned BIGINT: Use an unsigned BIGINT as your primary key, and suddenly your table can handle a massive 18,446,744,073,709,551,615 rows. Perfect for projects with lots and lots of data!

To check the current auto-increment value for a table in MySQL, you can use the SHOW TABLE STATUS statement. Here’s an example for the Employee table:


SHOW TABLE STATUS LIKE ‘Employee’;

When the auto-increment value is set to 5, we can successfully execute a new insert statement. However, after altering the table and setting the maximum limit value to 4,294,967,295, as shown in the screenshot below, we encounter an issue. An error is displayed:

In some real projects and production environments, you might encounter a different error, or it might simply fail to insert the record without displaying an error. Take a careful look at the screenshot below to understand how it works.

ERROR 167 (22003): Out of range value for column 'employee_id' at row 1

Making the Most of Your Database:

While these numbers sound huge, think about what your project really needs. Always plan for the future and choose your primary key type wisely.

So, when it comes to MySQL row limits, understanding your primary key is the key! Make your MySQL database awesome and stay tuned for more simple tips.

So, when it comes to MySQL row limits, understanding your primary key is the key! Make your MySQL database awesome and stay tuned for more simple tips. If you’re eager to explore the nitty-gritty details and official documentation on MySQL row and column limits, check out the MySQL official documentation.

If you’re interested in diving into the basics of Python programming for beginners, check out our guide on Python for Beginners: Variables and Strings.

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