我将4个CSV文件导入SQLITE(mastersuppress, ddsummary, rm5, excludelist
)。所有文件都包含1列(AccountNumber)。
我设法找到3个文件之间的重复帐号,并使用以下代码将结果保存在名为Output
的新CSV文件中:
select mastersuppress.Account
from mastersuppress
inner join ddsummary
on mastersuppress.Account=ddsummary.Account
union all
select rm5.Account
from rm5
inner join ddsummary
on rm5.Account=ddsummary.Account
然后我设法使用第二个代码从Output
文件中删除excludelist
文件中的帐号以及帐号#:
delete from Output
where AccountNumber in
(
select min(AccountNumber)
from excludelist
group by
AccountNumber
);
Select * FROM Output;
如何将这2个代码编译成1个代码而无需在进程之间创建输出文件。所以代码看起来像这样
Delete from ***FirstCodeResult***
where AccountNumber in
(
select min(AccountNumber)
from excludelist
group by
AccountNumber
);
//Display the result
答案 0 :(得分:0)
我会使用except
:
select m.Account
from mastersuppress m inner join
ddsummary ds
on m.Account = ds.Account
union
select rm5.Account
from rm5 inner join
ddsummary ds
on rm5.Account = ds.Account
except
select el.AccountNumber
from excludelist el;
except
和union
删除重复项。