----對於銷售員提成收入的計算
create table emplyees
(empid int not null,
empname nvarchar(20) not null
)insert emplyees
select 1,'張三'
union
select 2,'李四'
union
select 3 ,'王五'
gocreate table bills
(empid int not null,
billdate datetime not null,
billrate decimal(5,2)
)insert bills
select 1,'2009-1-1',25 union
select 2,'2010-1-1',15 union
select 3,'2011-1-1',20 union
select 1,'2011-1-1',30 union
select 2,'2011-1-1',35
gocreate table hoursworked
(jobid int not null,
empid int not null,
workdate datetime not null,
billhours decimal(5,2)
)insert hoursworked
select 4,1,'2011-2-1',3 union
select 4,1,'2011-3-1',5 union
select 4,2,'2011-4-1',2 union
select 4,1,'2011-5-1',4
go---需要乙個查詢，用來實現顯示某個**工作的**員的姓名和總提成。總提成按每個**員分別計算
----方法是工作小時數乘以適用的每小時收費標準。
---方法
一、使用檢視
create view hourraterpt
as select h1.empid,empname,workdate,billhours,
(select billrate from bills as s1
where billdate=(select max(billdate) from bills as s2
where s2.billdate<=h1.workdate and s1.empid=s2.empid
and s1.empid=h1.empid)) as billrate
from hoursworked h1,emplyees e1
where e1.empid=h1.empid
goselect empid,empname,sum(billhours*billrate) as billtotsal
from hourraterpt
group by empid,empname
---方法二，使用一條sql語句實現
---go
--select e1.empid,e1.empname,sum(billhours*
--(select billrate from bills as b1
-- where billdate=(select max(billdate) from bills as b2
-- where b2.billdate<=h1.workdate and b1.empid=b2.empid and b1.empid=h1.empid)))
--from hoursworked h1,emplyees e1
--where h1.empid=e1.empid
--group by e1.empid,e1.empname
goselect e1.empid,e1.empname,sum(billhours*b1.billrate)
from hoursworked h1,emplyees e1 ,bills as b1
where e1.empid=b1.empid and e1.empid=h1.empid and
billdate=(select max(billdate) from bills b2 where b2.empid=e1.empid and b2.billdate<=h1.workdate)
and h1.workdate>=b1.billdate
group by e1.empid,e1.empname
godrop table emplyees;
drop table hoursworked;
drop table bills;
drop view hourraterpt
SQL語句練習
建立一張表，記錄 呼叫員的工作流水，記錄呼叫員編號，對方號碼，通話開始時間，結束時間。建表，插資料等都自己寫出sql 要求 輸出所有資料中通話時間最長的5條記錄。輸出所有資料中撥打長途號碼 對方號碼以0開頭 的總時長 輸出本月通話時長最多的前三個呼叫員的編號 輸出本月撥打 次數最多的前三個呼叫員的編...
SQL 語句練習
mysql select from persons limit 5 oracle select from persons where rownum 5 select from persons where name like l select from persons where name not l...
SQL語句練習
1 把兩張 的資料抽取出來放到另外一張 中 1 pt表 role id int pt int 2 season score表 role id int season score int 3 player表 role id int pt int season score int count int 4 ...