我有 2 张桌子:
CUSTOMERS
id company frontname
PROJECT
id customer_id
我要做的是寻找客户,并返回一个项目。谁能帮我解决这个问题?
where
加入2个表并添加一个条件,就可以得到一个客户的所有项目
select p.*
from project p
inner join customer c on c.id = p.customer_id
where c.frontname = 'customer name'
SELECT * FROM PROJECT WHERE customer_id = yourvalue
或者,如果您需要从客户表中查询值,只需进行联接。
SELECT * FROM Project p
JOIN CUSTOMER c on P.customer_id = c.id
WHERE c.company = 'CompanyName'