Question

我刚刚在sqlserver中使用adventureworks数据库。我陷入了疑问。我想选择HumanResources.Employee的所有标题，这些标题是“男性”或“女性”，但不是两者。即如果会计师是男性和女性，我想留下这个头衔。我只需要那些性别为男性或女性的头衔。

我已经这样做了。

从humanresources.employee中选择distinct（'title'，其中gender ='M'
  从humanresources.employee中选择distinct（'F'
的distinct（title）

这两个查询之间的联接可能会起作用。但如果您有任何其他解决方案，请告诉我。

这不是作业。：）

提前致谢。

Answer 1

使用：

SELECT t.title
  FROM HUMANRESOURCES.EMPLOYEE t
 WHERE t.gender = 'M'
   AND NOT EXISTS(SELECT NULL
                    FROM HUMANRESOURCES.EMPLOYEE e
                   WHERE e.gender = 'F'
                     AND e.title = t.title)
UNION ALL
SELECT t.title
  FROM HUMANRESOURCES.EMPLOYEE t
 WHERE t.gender = 'F'
   AND NOT EXISTS(SELECT NULL
                    FROM HUMANRESOURCES.EMPLOYEE e
                   WHERE e.gender = 'M'
                     AND e.title = t.title)

Answer 2

以下是更正后的版本

select title from HumanResources.Employee as t
where gender='M' And Not Exists(select null from HumanResources.Employee as e
                        where gender='F' And e.title =t.title)
Union 

select title from HumanResources.Employee as t1
where gender='F' And Not Exists(select null from HumanResources.Employee as e1
                        where gender='M' And e1.title =t1.title)
order by title

Answer 3

试试这个

select distinct title FROM humanResources.employee 
WHERE gender = 'M'  and 
  jobtitle not in (select title FROM humanResources.employee  WHERE gender='F') 
union
select distinct title FROM humanResources.employee 
WHERE gender = 'F'  and 
  jobtitle not in (select title FROM humanResources.employee  WHERE gender='M')

Answer 4

select title
from (
    select distinct title, gender
    from HumanResources.Employee) as temptable
group by title
having count(title) = 1

Answer 5

为了多样化，我喜欢这个（仅仅是为了美学）

with WomensJobs as
(
    select distinct(Title) title from HumanResources.Employee where Gender='F' 
),
MensJobs as
(
    select distinct(Title) title from HumanResources.Employee where Gender='M'
),
WomenOnlyJobs as
(
    SELECT title from WomensJobs EXCEPT SELECT title from MensJobs
),
MenOnlyJobs as
(
    SELECT title from MensJobs EXCEPT SELECT title from WomensJobs
)
select 'M', title from MenOnlyJobs
UNION 
select 'F', title from WomenOnlyJobs

Answer 6

SELECT DISTINCT(title)
  FROM HumanResources.Employee
 WHERE t.gender = 'M'
EXCEPT
SELECT DISTINCT(t.title)
  FROM HumanResources.Employee
 WHERE t.gender = 'F'

UNION

SELECT DISTINCT(title)
  FROM HumanResources.Employee
 WHERE t.gender = 'F'
EXCEPT
SELECT DISTINCT(t.title)
  FROM HumanResources.Employee
 WHERE t.gender = 'M'

在SQL查询中，AdventureWorks需要帮助

6 个答案: