Question

我知道有类似的问题，但我还没有找到一个讨论这个......

示例销售表。需要退回未销售产品类型的个人姓名＆＃39; A＆＃39;在16日 - 2月16日

Name        Date            Product Type
John        21-Feb-16       A
John        21-Feb-16       B
Joe         21-Feb-16       D
Joe         21-Feb-16       B
Jane        21-Feb-16       A
Jane        21-Feb-16       D

期望的回报：

Name        
Joe

需要的不仅仅是......

select 
distinct Name
from Sales
where Name = 'Joe'

Answer 1

刚刚阅读

中的Not not

select *
from Sales
where Name not in 
(select name
from Sales
where Date='21-Feb-16'
and product_type='A')

Answer 2

如果您有SalesPerson这样的表格;使用not exists()：

select Name
from SalesPerson sp
where not exists (
  select 1
  from Sales s
  where s.SalesPersonId = sp.SalesPersonId
    and s.ProductType = 'A'
    and s.date = '20160221' 
  )

否则：

select distinct Name
from Sales s
where not exists (
  select 1
  from Sales i
  where s.Name = i.Name
    and i.ProductType = 'A'
    and i.date = '20160221'
  )

Answer 3

您可以使用EXCEPT运算符。

SELECT DISTINCT Name
FROM Sales
EXCEPT
SELECT Name
FROM Sales
WHERE ProductType = 'A' AND Date = '21-Feb-16'

Answer 4

您可以使用NOT in和以下子选择。实际上，您检索所有卖家，不包括卖出至少一种A类产品的卖家

select distinct 
    Name
from 
    Sales
where 
    Name not in (select distinct Name
                 from Sales
                 where Product_type = 'A' and date '21-feb-2016')

Answer 5

如何使用：

select 
Name
from Sales
where Name = 'Joe'
group by Name

SQL - 根据另一列中的条件在一列中选择不同的记录

5 个答案: