mysql group by avg_mysql~group by

`GROUP BY` is a clause in MySQL that is used to group rows that have the same values in a specific column or columns.

`AVG` is a function in MySQL that is used to calculate the average of a set of values.

So, if you want to group rows by a specific column and then calculate the average for each group, you can use both `GROUP BY` and `AVG` together.

For example, let's say you have a table called "sales" with columns "region" and "sales_amount". You can use the following query to group the sales by region and calculate the average sales amount for each region:

SELECT region, AVG(sales_amount) FROM sales GROUP BY region;

This will return a result set that shows each region and its average sales amount.