一条查询语句,帮忙看看
表1:
truck_code chg_code amount
7022 拖车费 670
7022 提箱费 75
6892 工资 50
6892 佣金 30
6892 港建费 30
6892 油费 100

表2:
truck_codechg_code
6892 过路费
6892 修理费
7022 油费
7022 吊箱费
6892 工资
7022 佣金

显示如果如下:
7022 拖车费 670
7022 提箱费 75
6892 港建费 30
6892 油费 100

也就是说,只要不在表2中的都显示出来;条件是根据truck_code和chg_code;
请帮忙下,谢谢!~~

[解决办法]

select * from A
where not exists(select 1 from B where truck_code=A.truck_code )
[解决办法]
select * from 表1 a where NOT EXISTS(select * from 表2 b where a.truck_code=b.truck_code and a.chg_code = b.chg_code)
[解决办法]
select a.*
from A left join b on a.truck_code = b.truck_code
where b.truck_code is null
[解决办法]
select * from table1 ajoin (select truck_code, chg_code from table1 where not exists select * from table2)b on a.truck_code=b.truck_code and a.chg_code=b.chg_code