sql join命令问题

Question

我有两张桌子， 第一个表格：tasktable，其中包含以下列：

• 专案编号
• 的taskid
• 用户
• STARTDATE
• totalduration
• remainingduration

第二个表：projecttable包含列：

• 专案编号
• 项目名称

现在我尝试使用join查询这两个表并获取

的所有详细信息

taskid,user,projectname for the following condition

currentdate > startdate and remainingduration > 0

有些人可以帮我解决这个问题。

由于

Answer 1

只需加入projectid

上的两个表格即可

select taskid,user,projectname  
from tasktable 
join projecttable on projecttable.projectid= tasktable.projectid 
where CURDATE() > startdate and remainingduration > 0

希望startdate列是dateformat

Answer 2

此语句为您提供所需的结果。

SELECT taskid, user, projectname FROM tasktable
INNER JOIN projecttable ON tasktable.projectid = projecttable.projectid
WHERE currentdate > startdate AND remainingduration > 0

Answer 3

Select t1.taskid, t1.user, t2.projectname
from tasktable t1 join projecttable t2 ON (t1.projectid = t2.projectid)
where currentday > startdate and t1.remainingduration > 0
order by t1.taskid

Answer 4

试试这个：

SELECT * FROM projecttable INNER JOIN tasktable ON 
tasktable.projectid = projecttable.projectid AND GETDATE() > startdate 
AND remainingduration > 0

您可以在连接条件

中添加条件