Software⏱️ 2 min read📅 2026-05-30

How to Fix: Error related to only_full_group_by when executing a query in MySql

Error related to only_full_group_by when executing a query in MySql

Quick Answer: To resolve this issue, use the GROUP_CONCAT function or aggregate functions (e.g., SUM, COUNT) on non-aggregated columns to make them functionally dependent on the GROUP BY clause.

📋 Table of Contents

  1. 🔍 Why This Happens
  2. ✅ Best Solutions to Fix It
  3. ✨ Wrapping Up

Error related to only_full_group_by when executing a query in MySql occurs due to the upgrade from older versions of MySQL. In MySQL 5.7, this error is triggered when a SELECT statement contains non-aggregated columns that are not functionally dependent on the columns in the GROUP BY clause.

🔍 Why This Happens

  • [Cause]

✅ Best Solutions to Fix It

Method 1: Use GROUP_CONCAT

  1. Step 1: Wrap the non-aggregated column in GROUP_CONCAT() function.

Method 2: Modify SQL Query

  1. Step 1: Identify the non-aggregated columns and ensure they are functionally dependent on the columns in the GROUP BY clause.

✨ Wrapping Up

[Wrap-up]

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