MySql Query:sertakan hari yang memiliki COUNT(id) ==0 tetapi hanya dalam 30 hari terakhir

Anda memerlukan tabel tanggal, lalu gabung ke tabel build.

Sesuatu seperti ini:

SELECT 
    COUNT(id) AS 'Past-Month-Builds', 
    CONCAT(MONTH(DateTable.Date), '-', DAY(DateTable.Date)) as 'Month-Day' 
FROM DateTable
    LEFT JOIN builds ON DATE(builds.submittime) = DateTable.Date
WHERE DateTable.Date >= DATE_SUB(CURDATE(), INTERVAL 30 day) 
GROUP BY MONTH(submittime), DAY(submittime);