Question

我不知道我的问题是否可以理解，情况喜欢这样：我有两个查询，它们具有显示面板ID和左点的相同要求，但一个是仍然获得2000积分的客户，一个是已经兑换一次的客户，我在下面写下两个查询。

1）

select panel_ID,current_points_balance, sum(points_earned) as totalpoint
from Tbl_member, Tbl_member_participation
where tbl_member_participation.member_id = Tbl_member.member_id
group panel_Id, current_points_balance
having totalpoint > 2000

2）

select panel_ID,current_points_balance, sum(points_earned) as totalpoint
from Tbl_member, Tbl_member_redemption
where tbl_member_redemption.member_id = Tbl_member.member_id
group panel_Id, current_points_balance

所以我的问题是如何在一个查询中组合这两个条件，或者只在一个表中显示两个查询的两个结果？我不认为我可以简单地使用＆＃34;或＆＃34;把它们结合起来，这是我所知道的唯一方法。

Answer 1

关键字UNION和UNION ALL用于连接两个查询的结果与SAME NO OF COLUMNS。

在您的查询中使用UNION语句。不确定以下内容是否适用于您的数据库。但是请尝试在任何问题上发表评论

select panel_ID,current_points_balance, sum(points_earned) as totalpoint
from Tbl_member, Tbl_member_participation
where tbl_member_participation.member_id = Tbl_member.member_id
group panel_Id, current_points_balance
having totalpoint > 2000
UNION
select panel_ID,current_points_balance, sum(points_earned) as totalpoint
from Tbl_member, Tbl_member_redemption
where tbl_member_redemption.member_id = Tbl_member.member_id
group panel_Id, current_points_balance

Answer 2

如果你想将这些查询的结果合并到一个视图中，我的意思是你有两个colums panel_ID，current_points_balance，你想在同一列本身显示两个查询的结果，然后使用{{1} }，UNION

UNION ALL

或者您可以使用

select 
    panel_ID, current_points_balance, 
    sum(points_earned) as totalpoint
from 
    Tbl_member, Tbl_member_participation
where 
    tbl_member_participation.member_id = Tbl_member.member_id
group 
    panel_Id, current_points_balance
having 
    totalpoint > 2000

UNION

select 
    panel_ID,current_points_balance, 
    sum(points_earned) as totalpoint
from 
    Tbl_member, Tbl_member_redemption
where 
    tbl_member_redemption.member_id = Tbl_member.member_id
group 
    panel_Id, current_points_balance

select panel_ID,current_points_balance, sum(points_earned) as totalpoint from Tbl_member, Tbl_member_participation where tbl_member_participation.member_id = Tbl_member.member_id group panel_Id, current_points_balance having totalpoint > 2000 UNION ALL select panel_ID,current_points_balance, sum(points_earned) as totalpoint from Tbl_member, Tbl_member_redemption where tbl_member_redemption.member_id = Tbl_member.member_id group panel_Id, current_points_balance和UNION之间的区别只不过是union会消除所有重复的行，而union将不会消除重复的行

试试这个，如果有任何问题与此相关，请发表评论

如何使两个查询中的两个结果（具有相同的列）显示在单个查询表中

2 个答案: