select pmt.col1,table2.col1,table2.col3,table3.col1,table3.col1
from table2 inner join (select distinct
col1,col2 from table1) pmt on
table2.col1=pmt.col1 inner join table3 on
table3.col1=table1.col2 where table2.col2 is null;
有没有办法可以在这个查询中选择pmt.col3(这是table1的其他列)。
非常感谢
答案 0 :(得分:2)
只需选择子查询中的列即可。例如,使用max
将结果集限制为一条记录:
select pmt.col1,
(select max(col3)
from table1 t1
where t1.col1 = pmt.col1
and t1.col2 = pmt.col2) col3,
table2.col1,
table2.col3,
table3.col1,
table3.col1
from table2
inner join (select distinct col1,col2
from table1) pmt
on table2.col1=pmt.col1
inner join table3
on table3.col1=table1.col2
where table2.col2 is null;