一、按部门名称查询出员工的人数大于等于100的语句.(员工:emp_employee, 部门名称: department,员工姓名chnalias.)
SELECT departrnent FROM emp_employee GROUP BY departrnent HAVING COUNT(*) >=100
二、把员工的姓名、性别和年龄显示出来。(员工表emp_employee, 员工姓名:chnalias,年龄age,性别:gender。性别表:pub_gendar_info,性别名称:smpalias,与员工表的性别关
SELECT e.chnalias,g.smpalias,e.age FROM emp_employee e INNERJOIN pub_gendar g ONe.gendar = g.smpalias
三、当部门表的名称为空时,用0来代替。(部门表org_department 名称smpalias)
SELECT (CASE WHEN smpalias=’null’ THEN ’0′ ELSE smpalias END) AS ‘部门名称’ FROM org_departmen Select replace(smpalias,’null’,’0’) fromorg_department
四、删除员工表中的姓名重复的数据,只保留重复数据中的一条数据。(员工表emp_employee,员工姓名:chnalias)
DELETE FROM emp_employee WHERE id NOT IN ( SELECT MAX(id) AS id FROM emp_employee GROUP BY chnalias )
五、有三个部门:1人力资源部,2信息中心,3.安全监察部分别把这个三个部门的人员统计出来。要求用sql语句一行来实现(员工表emp_employee,员工姓名:chnalias,员工表对应的部门id:department.。部门表:org_departmen。部门表的字段:部门名称smpalias,部门主键:id)部门表的id=员工表的department 显示的结果应该是: 人力资源部 信息中心 安全监察部 10 20 30
SELECT SUM (f.s1) AS ‘人力资源部’,SUM (f.s2)AS ‘信息中心’, SUM (f.s3)AS ‘信息中心’ from ( SELECT(CASE WHEN d.smpalias=’人力资源部’ THEN SUM(e.Departid) END) AS s1, (CASE WHEN d.smpalias=’信息中心’ THEN SUM(e.Departid) END) AS s2, (CASE WHEN d.smpalias=’安全监察部’ THEN SUM(e.Departid) END) AS s3 FROM emp_employee e INNER JOIN org_departmen d ONe.departId=d.id GROUP BY d.smpalias )
六、查询出差表中的每个员工最近的出差时间和员工姓名(出差表emp_travel,员工姓名chnalias,出差时间godate)
SELECT chnalias,godate FROM emp_travel ORDERBY godate DESC
七、请写一个存储过程,把emp_employee表中的chnalias这个字段的名称更新为’您好’。
CREATE PROC proc_updateemp AS UPDATE FROM emp_employee SET chnalias = ‘您好’ GO EXEC proc_updateemp
八、请写一个函数,用来实现把一个字段的内容横向显示出来。(表pub_codeitem_inf,代码组字段groupcode,名称字段:smpalias.每行内容用逗号分开)
create function dbo.f_str(@id int) return varchar(100) as begin declare @str varchar(1000) set @str=”; select @str=@str+’,’+cast(smpalias as varchar) frompub_codeitem_inf where groupcode=@id set @str=right(@str,len(@str)-1) return @str end go –调用函数 select groupcode,smplias=dbo.f_str(groupcode) from pub_codeitem_inf groupby groupcode
九、请写一个游标用来把表中的数据显示出来(表emp_employee,显示姓名chnalias和单位company)
Create proc employee @company varchar(50)=’’ @chnalias varchar(50)=’’ as declare @curList set @curList= cursor for select chnalias,company fromemp_employee open @curList fetch next from @curList into @chnalias,@company while(@@fetch status=0) begin print @chnalias+@company fetch next from @curList into @chnalias,@company end close @curList deallocate @curList 十、请用sql语句写一个从1减到100的语句出来。 Declare @star int ,@sum int Select @star =1,@sum=0 While(@star<=100) Begin Set @sum=@sum – @star Set @star=@star + 1 End Select @sum