-- not in 的替代写法
select col from table1 where col not in
(select col from table2);
select col,table2.col temp_col
from table1 left join table2
on table1.col = table2.col
where temp_col is null;
-- in 的替代写法
select col from table1 where col in
(select col from table2);
select col,table2.col temp_col
from table1 left join table2
on table1.col = table2.col
where temp_col is not null;