【sql server 2000学习笔记2】dts，批，脚本，局部变量，全局变量，流程控制语言，存储控制

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1

使用dts 导入导出数据

2

批，脚本，局部变量，全局变量，流程控制语言（waitfor ， case ）

3存储过程

导出 sql2000各表数据脚本的存储过程

CREATE PROCEDURE dbo.UspOutputData 
@tablename sysname 
AS 
declare @column varchar(1000) 
declare @columndata varchar(1000) 
declare @sql varchar(4000) 
declare @xtype tinyint 
declare @name sysname 
declare @objectId int 
declare @objectname sysname 
declare @ident int 
set nocount on 
set @objectId=object_id(@tablename) 
if @objectId is null -- 判断对象是否存在 
begin 
print 'The object not exists' 
return 
end 
set @objectname=rtrim(object_name(@objectId)) 
if @objectname is null or charindex(@objectname,@tablename)=0 --此判断不严密 
begin 
print 'object not in current database' 
return 
end 
if OBJECTPROPERTY(@objectId,'IsTable') < > 1 -- 判断对象是否是table 
begin 
print 'The object is not table' 
return 
end 
select @ident=status&0x80 from syscolumns where id=@objectid and status&0x80=0x80 
if @ident is not null 
print 'SET IDENTITY_INSERT '+@TableName+' ON' 
declare syscolumns_cursor cursor
for select c.name,c.xtype from syscolumns c where c.id=@objectid order by c.colid 
open syscolumns_cursor 
set @column='' 
set @columndata='' 
fetch next from syscolumns_cursor into @name,@xtype 
while @@fetch_status < >-1 
begin 
if @@fetch_status < >-2 
begin 
if @xtype not in(189,34,35,99,98) --timestamp不需处理，image,text,ntext,sql_variant 暂时不处理 
begin 
set @column=@column+case when len(@column)=0 then'' else ','end+@name 
set @columndata=@columndata+case when len(@columndata)=0 then '' else ','','','
end 
+case when @xtype in(167,175) then '''''''''+'+@name+'+''''''''' --varchar,char 
when @xtype in(231,239) then '''N''''''+'+@name+'+''''''''' --nvarchar,nchar 
when @xtype=61 then '''''''''+convert(char(23),'+@name+',121)+''''''''' --datetime 
when @xtype=58 then '''''''''+convert(char(16),'+@name+',120)+''''''''' --smalldatetime 
when @xtype=36 then '''''''''+convert(char(36),'+@name+')+''''''''' --uniqueidentifier 
else @name end 
end 
end 
fetch next from syscolumns_cursor into @name,@xtype 
end 
close syscolumns_cursor 
deallocate syscolumns_cursor 
set @sql='set nocount on select ''insert '+@tablename+'('+@column+') values(''as ''--'','+@columndata+','')'' from '+@tablename 
print '--'+@sql 
exec(@sql) 
if @ident is not null 
print 'SET IDENTITY_INSERT '+@TableName+' OFF' 
GO
使用方法：
exec UspOutputData 你的表名

本次实验用到的语句

select *
from student
declare @student_name varchar(20);
--如果没有在数据定义或变量声明语句中指定 n，则默认长度为 1。
set @student_name = '李勇';
select *
from student 
where student.sname = @student_name
select @@rowcount
select @@error
print @@version
select @@version
declare @x int, @s int;
set @s = 0;
set @x = 1;
while(@x<=100) 
	begin
		set @s = @s+@x
		set @x = @x + 1;
	end
print 's = '+ convert(char(4), @s)
waitfor delay '00:00:05'
select *
from grade
use GradeManager
go
select student.sno as '学号', student.sname as '姓名' , grade.cno  as '课程号' , course.cname as '课程名',
	case
		when grade.gmark>= 90 then '优秀'
		when grade.gmark>= 80 then '良好'
		when grade.gmark>= 70 then '中等'
		when grade.gmark>= 60 then '及格'
		else '不及格'
	end as '成绩'
from student, grade, course
where student.sno = grade.sno and grade.cno = course.cno