SqlServer 大数据量分页查询

SqlServer 分页查询，很多人习惯用 row_number 进行排序，在此排序的基础上利用 row_number 来处理分页。但 row_number 这个函数有个缺点，表的行数越多时，大到十几吨行或几十万行时，row_number 实现的翻页，页码越大查询效果越慢，甚至直接查询超时。

下面给出几种翻页的实现方法，供大家测试和参考，废话不多说，直接上语句。

sql 复制代码

 SELECT COUNT(*) As Total FROM V_ME_mom_order_List  
 WHERE cOrgCode LIKE '01%'  AND  ( 1=1  OR ISNULL(cInvCode,'')='')  AND  ( 1=1  OR ISNULL(cInvCCode,'')='')  AND  ( 1=1  OR ISNULL(cDepCode,'')='')  

  --1. ROW_NUMBER  正向======== > 起始行 + TOP 页大小
  SELECT Top 500 1 FROM 
  (  
	  SELECT row_number()over(order by MOMID) as rowNum, 
	  1 as c
	  FROM V_ME_mom_order_List WITH(NOLOCK)  
	  WHERE cOrgCode LIKE '01%'  
		AND  ( 1=1  OR ISNULL(cInvCode,'')='')  
		AND  ( 1=1  OR ISNULL(cInvCCode,'')='')  
		AND  ( 1=1  OR ISNULL(cDepCode,'')='')  
  ) t 
  WHERE t.rowNum > 136500 order by t.rowNum asc

  --2. ROW_NUMBER 正向======== > 起始行 + <= 结束行
  SELECT 1 FROM (  
	  SELECT row_number()over(order by MOMID) as rowNum, 
	  1 as c 
	  FROM V_ME_mom_order_List WITH(NOLOCK)  
	  WHERE cOrgCode LIKE '01%'  
		AND  ( 1=1  OR ISNULL(cInvCode,'')='')  
		AND  ( 1=1  OR ISNULL(cInvCCode,'')='')  
		AND  ( 1=1  OR ISNULL(cDepCode,'')='')  
  ) t 
  WHERE t.rowNum > 136500 AND  t.rowNum <= 13700 order by t.rowNum asc
  
  --3. ROW_NUMBER 反向查询
  SELECT * FROM (  
	  SELECT row_number()over(order by MOMID desc) as rowNum, 
	  *
	  FROM V_ME_mom_order_List WITH(NOLOCK)  
	  WHERE cOrgCode LIKE '01%'  
		AND  ( 1=1  OR ISNULL(cInvCode,'')='')  
		AND  ( 1=1  OR ISNULL(cInvCCode,'')='')  
		AND  ( 1=1  OR ISNULL(cDepCode,'')='')  
  ) t 
  WHERE t.rowNum > 0 AND  t.rowNum <= 52
  order by t.rowNum asc


--4. OFFSET 正向
SELECT 1
FROM V_ME_mom_order_List
WHERE  cOrgCode LIKE '01%' 
	AND  ( 1=1  OR ISNULL(cInvCode,'')='')  
	AND  ( 1=1  OR ISNULL(cInvCCode,'')='')  
	AND  ( 1=1  OR ISNULL(cDepCode,'')='')    -- 如果有的话
ORDER BY MOMID ASC  -- 分页必须指定排序，否则结果不可靠
OFFSET (274 - 1) * 500 ROWS  -- 计算需要跳过的行数
FETCH NEXT 500 ROWS ONLY;  -- 获取当前页的100条数据




--5. OFFSET 反向
SELECT *
FROM V_ME_mom_order_List
WHERE  cOrgCode LIKE '01%' 
	AND  ( 1=1  OR ISNULL(cInvCode,'')='')  
	AND  ( 1=1  OR ISNULL(cInvCCode,'')='')  
	AND  ( 1=1  OR ISNULL(cDepCode,'')='')    -- 如果有的话
ORDER BY MOMID DESC  -- 分页必须指定排序，否则结果不可靠
OFFSET 0 ROWS  -- 计算需要跳过的行数
FETCH NEXT 52 ROWS ONLY;  -- 获取当前页的100条数据

上面几种方式测试下来感觉正向、offset 的效果最好。如果有嵌套查询、子查询这些情况，子查询用 with 语句效果更好。