Question

I want to show two columns summarize data.

• table1 – count all fields that the id same as the id on the show_users table.
• table2 – sum all values that the id same as the id on the show_users table.

This is my query:

SELECT show_users.id, COUNT(`table1`.id) as sum_fields , SUM(`table2`.count) as count_all
FROM `show_users` 
LEFT JOIN `table1` ON `show_users`.id = `table1`.id
LEFT JOIN `table2` ON `show_users`.id = `table2`.id
GROUP by show_users.id 
ORDER BY sum_fields DESC

The table2 results are fine, but the table1 count isn’t correct values…
Why is that?

Answer 1

SELECT show_users.id, COUNT(DISTINCT `table1`.id) as sum_fields , SUM(`table2`.count) as count_all