本文主要給大家介紹實(shí)現(xiàn)sqlserver的row_number函數(shù)方法，其所涉及的東西，從理論知識(shí)來獲悉，有很多書籍、文獻(xiàn)可供大家參考，從現(xiàn)實(shí)意義角度出發(fā)，創(chuàng)新互聯(lián)累計(jì)多年的實(shí)踐經(jīng)驗(yàn)可分享給大家。 

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1. 使用臨時(shí)表

CREATE DEFINER=`root`@`%` PROCEDURE `sp_getMonitorInfo`(IN d_itemId INT, IN d_configId INT, d_count_num INT )

begin

set @count = 0;

set @num = 0;

SELECT @count :=count(1) FROM better.MonitorInfo where itemId=d_itemId and configId=d_configId;

IF @count<300

THEN

   SELECT id,cpu,cpu1,cpu2,cpu3,diskRead,diskWrite,memory,networkReceive,networkSend,time,configId,itemId FROM MonitorInfo where itemId=itemId and configId=configId;

ELSE

SET @num= round(@count/d_count_num,0);

select @num;

create temporary table tmp_MonitorInfo

(

tmp_id int(4) primary key not null auto_increment,

id  int(4) not null,

cpu int,

cpu1 int,

cpu2 int,

cpu3 int,

diskRead int,

diskWrite int,

memory int,

networkReceive int,

networkSend int,

time  varchar(40),

configId int,

itemId int

);

insert into tmp_MonitorInfo(id,cpu,cpu1,cpu2,cpu3,diskRead,diskWrite,memory,networkReceive,networkSend,time,configId,itemId)

select id,cpu,cpu1,cpu2,cpu3,diskRead,diskWrite,memory,networkReceive,networkSend,time,configId,itemId from MonitorInfo 

where itemId=d_itemId and configId=d_configId;

select  id,cpu,cpu1,cpu2,cpu3,diskRead,diskWrite,memory,networkReceive,networkSend,time,configId,itemId from tmp_MonitorInfo

where tmp_id%@num=0;

drop table tmp_MonitorInfo;

END IF;

end

2. 使用臨時(shí)變量

CREATE DEFINER=`root`@`%` PROCEDURE `sp_getMonitorInfo_2`(IN d_itemId INT, IN d_configId INT, d_count_num INT )

begin

set @count = 0;

set @num = 0;

SELECT @count :=count(1) FROM better.MonitorInfo where itemId=d_itemId and configId=d_configId;

IF @count<300

THEN

   SELECT id,cpu,cpu1,cpu2,cpu3,diskRead,diskWrite,memory,networkReceive,networkSend,time,configId,itemId FROM MonitorInfo where itemId=itemId and configId=configId;

ELSE

SET @num= round(@count/d_count_num,0);

select @num;

set @i = 0;

select * from (

select @i :=@i + 1 as tmp_id,id,cpu,cpu1,cpu2,cpu3,diskRead,diskWrite,memory,networkReceive,networkSend,time,configId,itemId from MonitorInfo 

where itemId=d_itemId and configId=d_configId) aa

where aa.tmp_id%@num=0;

END IF;

看了以上介紹實(shí)現(xiàn)sqlserver的row_number函數(shù)方法，希望能給大家在實(shí)際運(yùn)用中帶來一定的幫助。本文由于篇幅有限，難免會(huì)有不足和需要補(bǔ)充的地方，大家可以繼續(xù)關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊板塊，會(huì)定期給大家更新行業(yè)新聞和知識(shí)，如有需要更加專業(yè)的解答，可在官網(wǎng)聯(lián)系我們的24小時(shí)售前售后，隨時(shí)幫您解答問題的。