ROW_NUMBER返回值不一致

问题描述

| 我使用ROW_NUM（）函数在ASP.NET中进行分页

SELECT row_num,expense_id,email,reason,amount,date,category_name,is_income
FROM
  (
  SELECT e.expense_id,e.email,e.reason,e.amount,e.date,c.category_name,e.is_income,ROW_NUMBER() OVER(ORDER BY e.date DESC,e.expense_id) as row_num
  FROM Expense e
  JOIN Category c ON e.category_id = c.category_id
  WHERE e.date >=\'5-1-2011\' AND e.date<=\'5-31-2011\'
  ) as ExpenseInfo
WHERE email=\'[email protected]\'

但是它返回了一个不一致的row_num列表（例如1,3,4 ...或2,4 ...）。我怎么解决这个问题？ 提前致谢。 我解决了我的问题

SELECT RowNum,is_income
FROM
(
SELECT e.expense_id,Row_Number() OVER(ORDER BY date DESC) as row_num 
FROM Expense e JOIN Category c 
  ON e.category_id = c.category_id
WHERE e.date >=\'5-1-2011\' AND e.date<=\'5-31-2011\' AND e.email=\'[email protected]\'
) AS ExpenseInfo
WHERE row_num>=1 and row_num<=20

    

解决方法

        

Where email = \'[email protected]\'

正在过滤掉某些行。对于您在这里所做的事情，不需要“外部”查询。只需将它们包装在一起。

 SELECT ROW_NUMBER() OVER(ORDER BY e.date DESC,e.expense_id) as row_num,e.expense_id,e.email,e.reason,e.amount,e.date,c.category_name,e.is_income
  FROM Expense e
  JOIN Category c 
    ON e.category_id = c.category_id
  WHERE e.date >=\'5-1-2011\' 
    AND e.date <=\'5-31-2011\'
    AND e.email = \'[email protected]\'

    ,        在主查询中添加ROW_NUMBER。当您将其添加到子查询中时，首先生成数字，然后过滤记录。当您在最终结果上生成行号时，就不会有此问题。

select
  s.*,row_number() over(order by s.date desc,s.expense_id) as row_num
from
  (
   /*YourQueryWithAllItsConditions*/
  ) s