/*測試表為:office(officeid int,o_name varchar(50),o_type tinyint)
write by zhubian qq195986181
*/create procedure dbo.randselect
(@number int --輸入引數(要生成的記錄條數))as
declare @tablestring varchar(20)
create table #1(officeid int,o_name varchar(50),o_type tinyint) --存放隨機生成的記錄(臨時表)
create table #2(rand_num int) --存入已放入#1的記錄的officeid(實現不生成相同的兩條記錄)
declare @officeid int , @o_name varchar(50) , @o_type tinyint , @randnum int , @rowcount int , @i int
select @rowcount = (select count(*) from office)
if @number<@rowcount
begin
set @i = @number --要求隨機生成的記錄條數(輸入引數)
endelse
begin
set @i = @rowcount
enddeclare c cursor scroll for select * from office
open c
while(@i>0)
begin
declare @tempoid int--記錄生成生的隨機數是否重複
set @randnum = rand()*@rowcount+1
set @tempoid = (select count(*) from #2 where rand_num = @randnum)
while( @tempoid <>0 )
begin
set @randnum = rand()*@rowcount+1
set @tempoid = (select count(*) from #2 where rand_num = @randnum)
endfetch absolute @randnum from c into @officeid,@o_name,@o_type
insert into #1 values(@officeid,@o_name,@o_type)
insert into #2 values(@randnum)
set @i = @i-1
endclose c
deallocate c
select * from #1
drop table #1
drop table #2
go--exec randselect @number=150
--drop procedure dbo.randselect
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