sql中对表的操作

原创  sql中对表的操作 收藏


/*drop  database max*/
create database max
go
use max
go
create table course

(
  course_id char(6)  not null primary key,
  course_name varchar(20) not null ,
  course_hours int not null,
  course_credit float(6) not null
)
go


create table grade
(
 grade_id char(10) not null ,
 course_id  char(6) not null
 foreign key (course_id) references course(course_id),
 course_name varchar(20) not null,
 mark int ,
 makeup int
)

go

alter table grade
add constraint  pk_grade primary key (grade_id,course_id)
go  


create table empleoyee
(
empid int not null primary key,
empname varchar(10) not null,
sex char(2) not null,
department varchar(20) not null,
job varchar(20) not null,
startdate datetime not null,
gongling as datediff(yy,startdate,getdate()), 
tel varchar(11)
)
go 

insert into course values('030110','面向对象数据库基础',30,3.4)
insert into course values('030111','计算机网络',32,2)
insert into course values('030112','数据仓库',24,2)
insert into course values('030113','近世代数',16,1)
insert into course values('030114','计算机高新计术',16,1)

select * from course


insert into grade values('050310','030111','计算机网络',45,65)
insert into grade(grade_id,course_id,course_name,mark) values('050311','030111','计算机网络',80)
insert into grade(grade_id,course_id,course_name,mark) values('050312','030111','计算机网络',84)
insert into grade values('050313','030111','计算机网络',56,75)
insert into grade(grade_id,course_id,course_name,mark) values('0503114','030111','计算机网络',91)

select * from grade

insert into empleoyee(empid,empname,sex,department,job,startdate,tel) values(1,'wang','m','sqlserver','teacher','1989-01-01','1234567890')

select * from empleoyee

   

http://blog.csdn.net/dongguang1082/archive/2009/10/29/4743239.aspx