SQL 语句Oracle ：select嵌套：

Posted 2023-05-13

--4.列出COMPUTER 种类中最便宜的图书。 select min(retail),category from books where category='COMPUTER' group by category;怎么把标题列出来

select min(retail) as \'价格\',category as \'书名\' from books where category=\'COMPUTER\' group by category 参考技术A select min(retail) as '价格',category as '类别' from books where category='COMPUTER' group by category 你需要的是中文说明？还是字段名？？

sql嵌套删除语句

怎么实现嵌套删除？？？？？？？ 供应商号 和 货物号 为表主键
Sql = "delete * from 供应商货物表 where 供应商号=select 供应商号 from 供应商表 where 供应商名='" & Combo1.Text & "' and 货物号=select 货物号 from 商品表 where 货物名=‘" & List1.Text & "'"
急急 在线等

Sql = "delete * from 供应商货物表 where 供应商号=(select 供应商号 from 供应商表 where 供应商名='" & Combo1.Text & "') and 货物号=(select 货物号 from 商品表 where 货物名=‘" & List1.Text & "')" 参考技术A 把 delete * from 改成 delete from 就可以了 其他地方没有错误。。。 参考技术B delete *
from 供应商货物表 a
where 供应商名 = ****
and exists(select 1 from 商品表 b where a.货物号 = b.货物号)