php - 当 mysql 数据库中某些月份有空数据时，如何在使用 MONTHNAME 时包含所有月份？

Question

我有sql查询

select
    DISTINCT {fn MONTHNAME(entrydate)} AS monthname,
    emirate_name,
    location,
    price,
    bedroom 
from itf_property 
where 
    emirate_name='Dubai' 
    and location='JBR' 
    and bedroom='2' 
group by monthname 
order by id

我想选择从 1 月到 12 月的空月份，就像如果 1 月没有值那么它将显示 0。

上述查询的输出附有图片

Answer 1

如果在mysql上使用

select
DISTINCT {fn MONTHNAME(entrydate)} AS monthname,
emirate_name,
if(month is null, '0', month) as month, 
location,
price,
bedroom 
from itf_property 
where 
emirate_name='Dubai' 
and location='JBR' 
and bedroom='2' 
group by monthname 
order by id