mysql - 如何从两个表中获取未映射的行

Question

我在 SQL 查询中遇到问题

我有两个表:

表一

ID Number
1  100
2  200
3  300
4  400
5  500
6  600
7  700
8  800
9  900

表二

ID Someotherdata
1  100
2  200
3  300
4  400
5  500

---

我尝试了一个查询

Select one.ID,one.Number
from table1 one
Left Outer Join
table2 two
on one.ID=two.id

我要结果

6  600
7  700
8  800
9  900

Answer 1

使用 except :

Select one.ID,one.Number
from table1 one
except
(Select one.ID,one.Number
from table1 one
inner join
table2 two
on one.ID=two.id)

SQL Fiidle to test

编辑(根据 OP 要求)

SELECT table1.id, table1.number FROM table1
LEFT JOIN table2 on table2.id = table1.id
WHERE table2.id  IS NULL

Here is the SQL Fiidle for Testing