如何每月显示零值的数据[重复]

Question

我有一个“MySQL 查询”，其中包含 1 年的数据项表。我想根据月份分组显示。

SELECT MONTHNAME(create_date) AS month, COUNT(*) AS cplan FROM nota_jual GROUP BY month

我希望显示的数据包含每个月值为 0 的项目。

month       cplan
January     3       
February    2       
March       0       
April       0       
May         0       
June        0       
July        8       
August      8       
September   6       
October     3       
November    5       
December    3       

有人可以帮助/回答这个问题吗？ （谢谢）

Answer 1

检查一下

SELECT date_format(tn.create_date,'%m') as Month, count(*) as cpplan
FROM nota_jual tn
GROUP BY Month
ORDER by Month;