--1、查找员工的编号、姓名、部门和出生日期，如果出生日期为空值，
--显示日期不详,并按部门排序输出,日期格式为yyyy-mm-dd。
select emp_no ,emp_name ,dept ,
isnull(convert(char(10),birthday,120), '日期不详 ') birthday
from employee
order by dept
--2、查找与喻自强在同一个单位的员工姓名、性别、部门和职称
select emp_no,emp_name,dept,title
from employee
where emp_name <> '喻自强 ' and dept in
(select dept from employee
where emp_name= '喻自强 ')
--3、按部门进行汇总，统计每个部门的总工资
select dept,sum(salary)
from employee
group by dept
--4、查找商品名称为14寸显示器商品的销售情况，
--显示该商品的编号、销售数量、单价和金额
select a.prod_id,qty,unit_price,unit_price*qty totprice
from sale_item a,product b
where a.prod_id=b.prod_id and prod_name= '14寸显示器 '
--5、在销售明细表中按产品编号进行汇总，统计每种产品的销售数量和金额
select prod_id,sum(qty) totqty,sum(qty*unit_price) totprice
from sale_item
group by prod_id
--6、使用convert函数按客户编号统计每个客户1996年的订单总金额
select cust_id,sum(tot_amt) totprice
from sales
where convert(char(4),order_date,120)= '1996 '
group by cust_id
--7、查找有销售记录的客户编号、名称和订单总额
select a.cust_id,cust_name,sum(tot_amt) totprice
from customer a,sales b
where a.cust_id=b.cust_id
group by a.cust_id,cust_name
--8、查找在1997年中有销售记录的客户编号、名称和订单总额
select a.cust_id,cust_name,sum(tot_amt) totprice
from customer a,sales b
where a.cust_id=b.cust_id and convert(char(4),order_date,120)= '1997 '
group by a.cust_id,cust_name
--9、查找一次销售最大的销售记录
select order_no,cust_id,sale_id,tot_amt
from sales
where tot_amt=
(select max(tot_amt)
from sales)
--10、查找至少有3次销售的业务员名单和销售日期
select emp_name,order_date
from employee a,sales b
where emp_no=sale_id and a.emp_no in
(select sale_id
from sales
group by sale_id
having count(*)> =3)
order by emp_name
--11、用存在量词查找没有订货记录的客户名称
select cust_name
from customer a
where not exists
(select *
from sales b
where a.cust_id=b.cust_id)
--12、使用左外连接查找每个客户的客户编号、名称、订货日期、订单金额
--订货日期不要显示时间，日期格式为yyyy-mm-dd
--按客户编号排序，同一客户再按订单降序排序输出
select a.cust_id,cust_name,convert(char(10),order_date,120),tot_amt
from customer a left outer join sales b on a.cust_id=b.cust_id
order by a.cust_id,tot_amt desc
--13、查找16M DRAM的销售情况，要求显示相应的销售员的姓名、
--性别，销售日期、销售数量和金额，其中性别用男、女表示
select emp_name 姓名, 性别= case a.sex when 'm ' then '男 '
when 'f ' then '女 '
else '未 '
end,
销售日期= isnull(convert(char(10),c.order_date,120), '日期不详 '),
qty 数量, qty*unit_price as 金额
from employee a, sales b, sale_item c,product d
where d.prod_name= '16M DRAM ' and d.pro_id=c.prod_id and
a.emp_no=b.sale_id and b.order_no=c.order_no
--14、查找每个人的销售记录，要求显示销售员的编号、姓名、性别、
--产品名称、数量、单价、金额和销售日期
select emp_no 编号,emp_name 姓名, 性别= case a.sex when 'm ' then '男 '
when 'f ' then '女 '
else '未 '
end,
prod_name 产品名称,销售日期= isnull(convert(char(10),c.order_date,120), '日期不详 '),
qty 数量, qty*unit_price as 金额
from employee a left outer join sales b on a.emp_no=b.sale_id , sale_item c,product d
where d.pro_id=c.prod_id and b.order_no=c.order_no
--15、查找销售金额最大的客户名称和总货款
select cust_name,d.cust_sum
from customer a,
(select cust_id,cust_sum
from (select cust_id, sum(tot_amt) as cust_sum
from sales
group by cust_id ) b
where b.cust_sum =
( select max(cust_sum)
from (select cust_id, sum(tot_amt) as cust_sum
from sales
group by cust_id ) c )
) d
where a.cust_id=d.cust_id
--16、查找销售总额少于1000元的销售员编号、姓名和销售额
select emp_no,emp_name,d.sale_sum
from employee a,
(select sale_id,sale_sum
from (select sale_id, sum(tot_amt) as sale_sum
from sales
group by sale_id ) b
where b.sale_sum <1000
) d
where a.emp_no=d.sale_id
--17、查找至少销售了3种商品的客户编号、客户名称、商品编号、商品名称、数量和金额
select a.cust_id,cust_name,b.prod_id,prod_name,d.qty,d.qty*d.unit_price
from customer a, product b, sales c, sale_item d
where a.cust_id=c.cust_id and d.prod_id=b.prod_id and
c.order_no=d.order_no and a.cust_id in (
select cust_id
from (select cust_id,count(distinct prod_id) prodid
from (select cust_id,prod_id
from sales e,sale_item f
where e.order_no=f.order_no) g
group by cust_id
having count(distinct prod_id)> =3) h )
--18、查找至少与世界技术开发公司销售相同的客户编号、名称和商品编号、商品名称、数量和金额
select a.cust_id,cust_name,d.prod_id,prod_name,qty,qty*unit_price
from customer a, product b, sales c, sale_item d
where a.cust_id=c.cust_id and d.prod_id=b.prod_id and
c.order_no=d.order_no and not exists
(select f.*
from customer x ,sales e, sale_item f
where cust_name= '世界技术开发公司 ' and x.cust_id=e.cust_id and
e.order_no=f.order_no and not exists
( select g.*
from sale_item g, sales h
where g.prod_id = f.prod_id and g.order_no=h.order_no and
h.cust_id=a.cust_id)
)
19、查找表中所有姓刘的职工的工号，部门，薪水
select emp_no,emp_name,dept,salary
from employee
where emp_name like '刘% '
20、查找所有定单金额高于20000的所有客户编号
select cust_id
from sales
where tot_amt> 20000
21、统计表中员工的薪水在40000-60000之间的人数
select count(*)as 人数
from employee
where salary between 40000 and 60000
22、查询表中的同一部门的职工的平均工资，但只查询＂住址＂是＂上海市＂的员工
select avg(salary) avg_sal,dept
from employee
where addr like '上海市% '
group by dept
23、将表中住址为 "上海市 "的员工住址改为 "北京市 "
update employee
set addr like '北京市 '
where addr like '上海市 '
24、查找业务部或会计部的女员工的基本信息。
select emp_no,emp_name,dept
from employee
where sex= 'F 'and dept in ( '业务 ', '会计 ')
25、显示每种产品的销售金额总和，并依销售金额由大到小输出。
select prod_id ,sum(qty*unit_price)
from sale_item
group by prod_id
order by sum(qty*unit_price) desc
26、选取编号界于‘C0001’和‘C0004’的客户编号、客户名称、客户地址。
select CUST_ID,cust_name,addr
from customer
where cust_id between 'C0001 ' AND 'C0004 '
27、计算出一共销售了几种产品。
select count(distinct prod_id) as '共销售产品数 '
from sale_item
28、将业务部员工的薪水上调3%。
update employee
set salary=salary*1.03
where dept= '业务 '
29、由employee表中查找出薪水最低的员工信息。
select *
from employee
where salary=
(select min(salary )
from employee )
30、使用join查询客户姓名为 "客户丙 "所购货物的 "客户名称 ", "定单金额 ", "定货日期 ", "电话号码 "
select a.cust_id,b.tot_amt,b.order_date,a.tel_no
from customer a join sales b
on a.cust_id=b.cust_id and cust_name like '客户丙 '
31、由sales表中查找出订单金额大于“E0013业务员在1996/10/15这天所接每一张订单的金额”的所有订单。
select *
from sales
where tot_amt> all
(select tot_amt
from sales
where sale_id= 'E0013 'and order_date= '1996/10/15 ')
order by tot_amt
32、计算 'P0001 '产品的平均销售单价
select avg(unit_price)
from sale_item
where prod_id= 'P0001 '
33、找出公司女员工所接的定单
select sale_id,tot_amt
from sales
where sale_id in
(select sale_id from employee
where sex= 'F ')
34、找出同一天进入公司服务的员工
select a.emp_no,a.emp_name,a.date_hired
from employee a
join employee b
on (a.emp_no!=b.emp_no and a.date_hired=b.date_hired)
order by a.date_hired
35、找出目前业绩超过232000元的员工编号和姓名。
select emp_no,emp_name
from employee
where emp_no in
(select sale_id
from sales
group by sale_id
having sum(tot_amt) <232000)
36、查询出employee表中所有女职工的平均工资和住址在＂上海市＂的所有女职工的平均工资
select avg(salary)
from employee
where sex like 'f '
union
select avg(salary)
from employee
where sex like 'f ' and addr like '上海市% '
37、在employee表中查询薪水超过员工平均薪水的员工信息。
Select * from employee where salary> (select avg(salary) from employee)
38、找出目前销售业绩超过40000元的业务员编号及销售业绩，并按销售业绩从大到小排序。
Select sale_id ,sum(tot_amt)
from sales
group by sale_id
having sum(tot_amt)> 40000
order by sum(tot_amt) desc
39、找出公司男业务员所接且订单金额超过2000元的订单号及订单金额。
Select order_no,tot_amt
From sales ,employee
Where sale_id=emp_no and sex= 'M ' and tot_amt> 2000
40、查询sales表中订单金额最高的订单号及订单金额。
Select order_no,tot_amt from sales where tot_amt=(select max(tot_amt) from sales)
41、查询在每张订单中订购金额超过24000元的客户名及其地址。
Select cust_name,addr from customer a,sales b where a.cust_id=b.cust_id and tot_amt> 24000
42、求出每位客户的总订购金额，显示出客户号及总订购金额，并按总订购金额降序排列。
Select cust_id,sum(tot_amt) from sales
Group by cust_id
Order by sum(tot_amt) desc
43、求每位客户订购的每种产品的总数量及平均单价，并按客户号，产品号从小到大排列。
Select cust_id,prod_id,sum(qty),sum(qty*unit_price)/sum(qty)
From sales a, sale_item b
Where a.order_no=b.order_no
Group by cust_id,prod_id
Order by cust_id,prod_id
44、查询订购了三种以上产品的订单号。
Select order_no from sale_item
Group by order_no
Having count(*)> 3
45、查询订购的产品至少包含了订单10003中所订购产品的订单。
Select distinct order_no
From sale_item a
Where order_no <> '10003 'and not exists (
Select * from sale_item b where order_no = '10003 ' and not exists
(select * from sale_item c where c.order_no=a.order_no and c.prod_id=b.prod_id))
46、在sales表中查找出订单金额大于“E0013业务员在1996/11/10这天所接每一张订单的金额”的所有订单，并显示承接这些订单的业务员和该订单的金额。
Select sale_id,tot_amt from sales
where tot_amt> all(select tot_amt from sales where sale_id= 'E0013 ' and order_date= '1996/11/10 ')
47、查询末承接业务的员工的信息。
Select *
From employee a
Where not exists
(select * from sales b where a.emp_no=b.sale_id)
48、查询来自上海市的客户的姓名，电话、订单号及订单金额。
Select cust_name,tel_no,order_no,tot_amt
From customer a ,sales b
Where a.cust_id=b.cust_id and addr= '上海市 '
49、查询每位业务员各个月的业绩，并按业务员编号、月份降序排序。
Select sale_id,month(order_date), sum(tot_amt)
from sales
group by sale_id,month(order_date)
order by sale_id,month(order_date) desc
50、求每种产品的总销售数量及总销售金额，要求显示出产品编号、产品名称，总数量及总金额，并按产品号从小到大排列。
Select a.prod_id,prod_name,sum(qty),sum(qty*unit_price)
From sale_item a,product b
Where a.prod_id=b.prod_id
Group by a.prod_id,prod_name
Order by a.prod_id
51、查询总订购金额超过’C0002’客户的总订购金额的客户号，客户名及其住址。
Select cust_id, cust_name,addr
From customer
Where cust_id in (select cust_id from sales
Group by cust_id
Having sum(tot_amt)>
(Select sum(tot_amt) from sales where cust_id= 'C0002 '))
52、查询业绩最好的的业务员号、业务员名及其总销售金额。
select emp_no,emp_name,sum(tot_amt)
from employee a,sales b
where a.emp_no=b.sale_id
group by emp_no,emp_name
having sum(tot_amt)=
(select max(totamt)
from (select sale_id,sum(tot_amt) totamt
from sales
group by sale_id) c)
53、查询每位客户所订购的每种产品的详细清单，要求显示出客户号，客户名，产品号，产品名，数量及单价。
select a.cust_id, cust_name,c.prod_id,prod_name,qty, unit_price
from customer a,sales b, sale_item c ,product d
where a.cust_id=b.cust_id and b.order_no=c.order_no and c.prod_id=d.prod_id
54、求各部门的平均薪水，要求按平均薪水从小到大排序。
select dept,avg(salary) from employee group by dept order by avg(salary)
n久前整理过的一些最基本的,随意看看.
1.Insert (添加数据)
.Inert Into tb1(field1,field2) Values(11, 'aa ')
.Inert tb1 Values(11, "aa ")
.Inert tb1(field1,field2) Select field3, 's '+field4 From tb2 Where field3 <22
.Inert tb1 Select * From tb2 Where field3 <22
2.Update (修改数据)
.Update tb1 Set field1=field1+1,field2= 'zz ' Where field1 <1
.Update tb1 Set field1=field1+1,field2= 'zz ' From (Select * From tb2 Where field3> 1) As a Where a.field3=table1.field2
.Update tb1 Set field1=field1+1,field2= 'zz ' From table2 As a,table1 as b Where a.field4=table1.field2
3.Delete (删除数据)
.Delete table1 Where field2 Like 'a% '
.Delete table1 From (Select * From table2 Where field3 <1) As a Where a.field4=table1.field2
.Delete table1 As a,table2 As b Where a.field2=b.field4 And b.field3 <1
4.Creat (在本机上新建msde数据库.如需安装在始动路径,改绝对路径为Application.StartupPath)
.if object_id( 'msde1 ') is null CREATE DATABASE msde1 ON (Name=msde1_dat,filename= 'C://msde1.mdf ',size=10,maxsize=50,filegrowth=10%) log on (name=msde1_log,filename= 'c://msde1.ldf ',size=3,maxsize=20,filegrowth=1)
5.Drop (删除表)
.Drop table1
.if object_id( 'table1 ') is not null DROP TABLE table1 (删除之前可先判断一下.)
.Drop table1 Truncate Table table2 (如table1 参照 table2,需要先删除 table1)
6.If,Else,Begin
If Exists(Select field2 From table1 Where field2= 'aa ')
Begin
Delect table1 Where field2= 'aa '
Print 'aa is deleted. '
End
Else
Print 'aa is not found. '
7.Declare,GOTO
Declare @s int,@time int
Select @s=1,@time=1
label1:
Select @s=@s*@time
Select @time=@time+1
If @time <=10
GOTO label1
Print '10 n= '+str(@s)
8.While,Break,Continue
While Boolean //Boolean: 1=1
{SQL}
Break
{SQL}
Continue
{SQL}
9.WaitFor
Begin
WaitFor Time '10:00:00 ' //(系统时间)
Select * From Table1
End
Begin
WaitFor Delay '1:00:00 ' //(1小时后)
Select * From Table1
End
10.Return
Create Procedure check_contact @para varchare(40)
AS
If (Select contract From authors Where au_lname=@para)=1
Return 1
Else
Return 2
11.Case
Select Name=Convert(varchar(15),au_lname),
Contract=Case contract
When 0 Then '0 '
When 1 Then '1 '
Else '2 '
End
From authors
Select Name=Convert(varchar(15),au_lname),
Contract=Case
When contract=0 Then '0 '
When contract <> 0 Then '1 '
End
From authors
12.DataLength //返回表达式中数据的实际长度(如为字段名,则返回字段中数据的长度,非字段定义长度.)
Select Name=field1,DataLength=DataLength(field1) From table1
13.Current_TimeStamp //返回系统的当前日期和时间
Use pubs
GO
Creat Table books
{
book_id char(3) Not NULL,
pub_date datetime Not NULL Default Current_TimeStamp,
price money
}
GO
Insert books(book_id,price)
Values( 'A01 ',$55.0)
14.FormatMessage //格式化指定错误号的错误信息
Declare @Err123 nvarchar(64)
Set @Err123=FormatMessage(123,50)
Print @Err123
15.GetAnsiNULL //返回数据库的默认空值设置
Select GetAnsiNULL( 'pubs ') //return 1:notNull; return 0: NULL
16.IsNULL //替换空值项(注意替换项和替换内容的类型需一致)
Select title=field2,num=IsNULL(field1,0) From table1
Select title=field2,num=IsNULL(str(field1), 'Nothing ') From table1
17.Coalescs //返回参数中的第一个非空(NULL)表达式
Select title=field2,numMark=Coalescs(field1,field2, 'Nothing ') From table1
////The Result: If field1 is null And field2 is not null Then return field2 's value.
If field1 is null And field2 is null Then return 'Nothing '.
18.Permissions //返回用户的语句和对象权限.
Declare @state_p int,@object_p int
Set @state_p=Permissions()
If (@sate_p & 2)=2
Print '你可以在当前数据库中创建表 '
If (@sate_p & 4)=4
Print '你可以在当前数据库中创建存储过程 '
If (@sate_p & 8)=8
Print '你可以在当前数据库中创建视图 '
Set @object_p=Permissions(Object_id( 'pubs..jobs '))
If (@object_p & 1)=1
Print '你可以检索jobs表中的数据 '
If (@object_p & 2)=2
Print '你可以修改jobs表中的数据 '
If (@object_p & 8)=8
Print '你可以向jobs表中添加数据 '
If (@object_p & 16)=16
Print '你可以删除jobs表中的数据 '
19.Convert //转换函数(从一种系统数据类型转换为另外一种)
Select thetime1=Convert(char,Current_TimeStamp,120),thetime2=Convert(char,Current_TimeStamp,108)
//////The Result: thetime1:2006-03-13 15:50:00; thetime2:03:50:00
Select s0=Convert(char,$123456789.9876,0),s1=Convert(char,$123456789.9876,1),s2=Convert(char,$123456789.9876,2)
//////The Result: s0:123456789.99; s1:123,456,789.99; s2:123456789.9876
Select n0=Convert(char,123456789.9876,0),n1=Convert(char,$123456789.9876,1),n2=Convert(char,$123456789.9876,2)
//////The Result: n0:123457; n1:1.2345679e+005; n2:1.234567890000000e+005
20.Cast //转换函数(转换格式控制没有Convert函数灵活)
Select title_id,theDate=Cast(pubdate As Char(11)) From titles Where title_id Like 'b% '
//////The Result: title_id: BU1032; theDate: Jun 12 1991
****************************
一些日期元素的取值范围:yy(1753~9999),qq(1~4),mm(1~12),dy(1~366),dd(1~31),wk(0~51),hh(0~23),mi(1~59),ss(1~59),ms(0~999)
****************************
21.DateAdd //返回指定时间间隔后的日期.
Select NowDate=GetDate(),LateDate=DateAdd(dy,60,GetDate())
22.DateDiff //返回时间间隔.
Select TheDate=pubdate,NowDate=GetDate(),NY=DateDiff(yy,pubdate,GetDate()),NM=DateDiff(mm,pubdate,GetDate()) From titles Where type= 'business '
23.DateName,DatePart //返回日期中指定部分对应的字符串,整数值
Select YN=DateName(yy,GetDate()) The Result: '2006 '
Select YI=DatePart(yy,GetDate()) The Result:2006
24.Char,Ascii
Print 'A==> ASCII value is: '+Char(13)+Str(Ascii( 'A '),2,0) //Enter key 's ASCII is 13.
//////The Result:A==> ASCII value is:
65
25.Stuff //删除字符串中指定位置的字符串,然后在删除位置插入字符串.
Print Stuff( 'abcdefghijk ',3,5, 'ABCD ')
//////The Result:abABCDhijk
26.Str
Print Str(10.1234,10,6)
//////The Result:10.123400
27.Replicate,Replace //按指定次数复制字符串,替换字符串中的内容.
Select Replace(Replicate( 'ABC ',2), 'BC ', 'bc ')
//////The Result:AbcAbc
28.sin,cos,tan,ctan...,Radians
Select sin30du=Sin(Radians(30.0)),ctan30du=cot(Radians(30.0))
29.Round(近似值)
Select r1=Round(918.2736,3),r2=Round(918.2736,-2),r3=Round(918.2736,3,1),r4=Round(918.2736,-2,1)
//////The Result: r1:918.2740; r2:900.0000; r3:918.2730; r4:900.0000;
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