Question

我有<svg height="300px" width="300px" viewBox="0 0 12 16"> <path fill="#FFF" stroke="black" stroke-width="0.5" stroke-linejoin="miter" d="M 6 1 c -2 3 -5 5 -5 9 0 7 10 7 10 0 0 -4 -3 -6 -5 -9z" /> </svg>的一个表和<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html xmlns:v="urn:schemas-microsoft-com:vml"> <head> <style> v\:* { behavior: url(#default#VML); } </style > </head> <body> <div style="width:240; height:320;"> <v:shape coordorigin="0 0" coordsize="12 16" fillcolor="white" strokecolor="black" strokewidth="1" strokeweight="5" style="width:240; height:320" path="M 6 1 v -2 3 -5 5 -5 9 0 7 10 7 10 0 0 -4 -3 -6 -5 -9 x e"> </v:shape> </div> </body> </html>的另一个表。我想contributions没有相关的贡献。

我可以加入profiles上的两个表格。

非常感谢任何帮助！

Answer 1

使用NOT EXISTS查找没有关联贡献的配置文件：

select * from profiles p
where NOT EXISTS (select 1 from contributions c
                  where c.profiles_id = p.id);

Answer 2

Try this.

select p.* from profiles p
left join contributions c on p.profile_id=c.profie_id 
where c.profile_id is NULL ;

Answer 3

*查询您需要的是：

SELECT 
    colA,
    colB,
    ....
FROM contributions tb1
WHERE 
    NOT EXISTS ( SELECT * from profiles tb2 where tb1.profiles_id = tb2.id )
GROUP BY
   colA,
   colB,
   ....

选择一列中不在另一个表格列中的所有值

3 个答案: