MySQL COUNT GROUP BY: Count Entries

In MySQL, the COUNT function can be used to count the number of entries in each group. Below is an example query:

SELECT column_name1, column_name2, COUNT(*) AS count
FROM table_name
GROUP BY column_name1, column_name2;

In the above query, column_name1 and column_name2 are the columns to be grouped, table_name is the name of the table to be queried. The COUNT(*) function is used to count the number of data in each group, and AS count is used to specify the name of this column in the result set. Finally, the GROUP BY clause is used to specify the columns to group by.

After executing the above query, it will return the values of column_name1 and column_name2 for each group, as well as the number of data entries in each group.