真正高效的SQLSERVER分页查询
sqlserver数据库分页查询一直是sqlserver的短板,闲来无事,想出几种方法,假设有表ARTICLE,字段ID、YEAR...(其他省略),数据53210条(客户真实数据,量不大),分页查询每页30条,查询第1500页(即第45001-45030条数据),字段ID聚集索引,YEAR无索引,sqlserver版本:2008R2
第一种方案、最简单、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
平均查询100次所需时间:45s
第二种方案:
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
平均查询100次所需时间:138S
第三种方案:
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
平均查询100次所需时间:21S
第四种方案:
SELECT * FROM ARTICLE w1 WHERE ID in ( SELECT top 30 ID FROM ( SELECT top 45030 ID,ID DESC ) w ORDER BY w.YEAR ASC,w.ID ASC ) ORDER BY w1.YEAR DESC,245); border-top:medium none; border-right:medium none" data-src="https://www.jb51.cc/res/2020/07-25/22/51e409b11aa51c150090697429a953ed.gif">
平均查询100次所需时间:20S
第五种方案:
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
平均查询100次所需时间:15S
查询第1000-1030条记录
第一种方案:
SELECT TOP 30 * FROM ARTICLE WHERE ID NOT IN(SELECT TOP 1000 ID FROM ARTICLE ORDER BY YEAR DESC,ID DESC
平均查询100次所需时间:80s
第二种方案:
SELECT * FROM ( SELECT TOP 30 * FROM (SELECT TOP 1030 * FROM ARTICLE ORDER BY YEAR DESC,s.ID DESC
平均查询100次所需时间:30S
第三种方案:
ottom:rgb(204,(
SELECT TOP 30 ID FROM
(
SELECT TOP 1030 ID,245); border-top:medium none; border-right:medium none" data-src="https://www.jb51.cc/res/2020/07-25/22/51e409b11aa51c150090697429a953ed.gif">