高效的SQLSERVER分頁查詢


Sqlserver數據庫分頁查詢一直是Sqlserver的短板,閑來無事,想出幾種方法,假設有表ARTICLE,字段ID、YEAR...(其他省略),數據53210條(客戶真實數據,量不大),分頁查詢每頁30條,查詢第1500頁(即第45001-45030條數據),字段ID聚集索引,YEAR無索引,Sqlserver版本:2008R2

第一種方案、最簡單、普通的方法: 

SELECT TOP 30 * FROM ARTICLE WHERE ID NOT IN (SELECT TOP 45000 ID FROM ARTICLE ORDER BY YEAR DESC, ID DESC) ORDER BY YEAR DESC,ID DESC

第二種方案: 

代碼如下:

SELECT * FROM (SELECT TOP 30 * FROM (SELECT TOP 45030 * FROM ARTICLE ORDER BY YEAR DESC, ID DESC) f ORDER BY f.YEAR ASC, f.ID DESC) s ORDER BY s.YEAR DESC,s.ID DESC

平均查詢100次所需時間:138S

第三種方案:

代碼如下:

SELECT * FROM ARTICLE w1,   
(  
    SELECT TOP 30 ID FROM   
    (  
        SELECT TOP 50030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC  
    ) w ORDER BY w.YEAR ASC, w.ID ASC  
) w2 WHERE w1.ID = w2.ID ORDER BY w1.YEAR DESC, w1.ID DESC

平均查詢100次所需時間:21S

第四種方案:

代碼如下:

SELECT * FROM ARTICLE w1   
    WHERE ID in   
        (  
            SELECT top 30 ID FROM   
            (  
                SELECT top 45030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC  
            ) w ORDER BY w.YEAR ASC, w.ID ASC  
        )   
    ORDER BY w1.YEAR DESC, w1.ID DESC

平均查詢100次所需時間:20S

第五種方案: 

代碼如下:

SELECT w2.n, w1.* FROM ARTICLE w1, (SELECT TOP 50030 row_number() OVER (ORDER BY YEAR DESC, ID DESC) n, ID FROM ARTICLE ) w2 WHERE w1.ID = w2.ID AND w2.n > 50000 ORDER BY w2.n ASC

平均查詢100次所需時間:15S

查詢第1000-1030條記錄

第一種方案: 

代碼如下:

SELECT TOP 30 * FROM ARTICLE WHERE ID NOT IN(SELECT TOP 1000 ID FROM ARTICLE ORDER BY YEAR DESC, ID DESC) ORDER BY YEAR DESC,ID DESC

平均查詢100次所需時間:80s

第二種方案:

代碼如下:

SELECT * FROM  (   SELECT TOP 30 * FROM (SELECT TOP 1030 * FROM ARTICLE ORDER BY YEAR DESC, ID DESC) f ORDER BY f.YEAR ASC, f.ID DESC) s ORDER BY s.YEAR DESC,s.ID DESC

平均查詢100次所需時間:30S

第三種方案: 

代碼如下

SELECT * FROM ARTICLE w1,   
(  
    SELECT TOP 30 ID FROM   
    (  
        SELECT TOP 1030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC  
    ) w ORDER BY w.YEAR ASC, w.ID ASC  
) w2 WHERE w1.ID = w2.ID ORDER BY w1.YEAR DESC, w1.ID DESC

平均查詢100次所需時間:12S

第四種方案: 

代碼如下:

SELECT * FROM ARTICLE w1   
    WHERE ID in   
        (  
            SELECT top 30 ID FROM   
            (  
                SELECT top 1030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC  
            ) w ORDER BY w.YEAR ASC, w.ID ASC  
        )   
    ORDER BY w1.YEAR DESC, w1.ID DESC

平均查詢100次所需時間:13S

第五種方案:

代碼如下:

SELECT w2.n, w1.* FROM ARTICLE w1,(SELECT TOP 1030 row_number() OVER (ORDER BY YEAR DESC, ID DESC) n, ID FROM ARTICLE) w2 WHERE w1.ID = w2.ID AND w2.n > 1000 ORDER BY w2.n ASC

平均查詢100次所需時間:14S

     由此可見在查詢頁數靠前時,效率3>4>5>2>1,頁碼靠后時5>4>3>1>2,再根據用戶習慣,一般用戶的檢索只看最前面幾頁,因此選擇3 4 5方案均可,若綜合考慮方案5是最好的選擇,但是要注意SQL2000不支持row_number()函數,由於時間和條件的限制沒有做更深入、范圍更廣的測試,有興趣的

第六種方案:

代碼如下:

SELECT* FROM (SELECT TOP 1030 row_number() OVER (ORDER BY YEAR DESC, ID DESC) n, * FROM ARTICLE) w2 WHERE  w2.n > 1000 

效率和第五種方案差不多

 


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