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