带有 order by 的 SQL 分页查询

2022-01-23 00:00:00 sql limit subquery sql-server pagination

我正在尝试编写一个查询来提取多个字段并为它们分配别名.其中一个别名实际上是两个字段的总和.这实际上是我最大的问题，因为该别名是排序的可能字段"之一，否则我可以取出所有别名而不会遇到这个问题.无论如何，我需要能够传入一个以编程方式排序的字段.但是因为需要用SQL进行分页，所以不能使用LIMIT的优雅功能，只能使用子查询.

I am trying to write a query that pulls multiple fields and assigns aliases to them. One of the aliases is actually a sum total of two fields. This is actually my biggest issue because that alias is one of the possible "fields" to sort by, or else I could just take out all of the aliases and not have this issue. Anyway, I need to be able to pass in a field in which to order by programmaticly. But because I need to do pagination with SQL, I cannot use the graceful function of LIMIT and have to use a sub query.

这是出现大问题的地方.因为我绝对必须在子查询中选择至少 2 列(因为我需要 ID 字段用于限制目的，并且总和别名作为按字段排序)，我不能将其用作And ID Not In (sub query)"，因为您只能以这种方式返回一个字段.因此，我将向您展示我的代码，然后解释我得到的结果.

This is where the big issue comes in. Because I absolutely HAVE to select at least 2 columns in the sub query (because I need the ID field for the limiting purpose, and the sum total alias as an order by field), I cannot use this as an "And ID Not In (sub query)" since you can only return one field in that manner. So I'll show you my code, then explain the results I am getting.

SELECT     TOP (50) dbo.tblMailList.mail_ID AS Expr1, dbo.tblMailList.mail_NameTitle AS Expr2, dbo.tblMailList.mail_FirstName AS Expr3, 
                      dbo.tblMailList.mail_LastName AS Expr4, dbo.tblMailList.mail_Company AS Expr5, dbo.tblMailList.mail_Institution AS Expr6, 
                      SUM(dbo.tblItem.item_pr + dbo.tblItem.item_premium) AS Expr7, dbo.tblMailList.mail_Comp_Art, dbo.tblMailList.mail_Comp_IndArt, 
                      dbo.tblMailList.mail_Comp_GenAm, dbo.tblMailList.mail_Comp_Fire, dbo.tblMailList.mail_Comp_Jewelry, dbo.tblMailList.mail_Comp_Ceramic, 
                      dbo.tblMailList.mail_Interest
FROM         (SELECT     TOP (50) tblMailList_1.mail_ID AS Expr1, tblMailList_1.mail_NameTitle AS Expr2, tblMailList_1.mail_FirstName AS Expr3, 
                                              tblMailList_1.mail_LastName AS Expr4, tblMailList_1.mail_Company AS Expr5, tblMailList_1.mail_Institution AS Expr6, 
                                              SUM(tblItem_1.item_pr + tblItem_1.item_premium) AS Expr7, tblMailList_1.mail_Comp_Art, tblMailList_1.mail_Comp_IndArt, 
                                              tblMailList_1.mail_Comp_GenAm, tblMailList_1.mail_Comp_Fire, tblMailList_1.mail_Comp_Jewelry, tblMailList_1.mail_Comp_Ceramic, 
                                              tblMailList_1.mail_Interest
                       FROM          dbo.tblItem AS tblItem_1 INNER JOIN
                                              dbo.tblBidder AS tblBidder_1 ON tblItem_1.item_bidder_number = tblBidder_1.bidder_number AND 
                                              tblItem_1.item_sale_id = tblBidder_1.bidder_sale_id INNER JOIN
                                              dbo.tblMailList AS tblMailList_1 ON tblBidder_1.bidder_mail_id = tblMailList_1.mail_ID
                       WHERE      (tblMailList_1.mail_Comp_Art <> '1' OR
                                              tblMailList_1.mail_Comp_Art IS NULL) AND (tblMailList_1.mail_Comp_IndArt <> '1' OR
                                              tblMailList_1.mail_Comp_IndArt IS NULL) AND (tblMailList_1.mail_Comp_GenAm <> '1' OR
                                              tblMailList_1.mail_Comp_GenAm IS NULL) AND (tblMailList_1.mail_Comp_Fire <> '1' OR
                                              tblMailList_1.mail_Comp_Fire IS NULL)
                       GROUP BY tblMailList_1.mail_Company, tblMailList_1.mail_Institution, tblMailList_1.mail_LastName, tblMailList_1.mail_FirstName, 
                                              tblMailList_1.mail_NameTitle, tblMailList_1.mail_ID, tblMailList_1.mail_Comp_Art, tblMailList_1.mail_Comp_IndArt, 
                                              tblMailList_1.mail_Comp_GenAm, tblMailList_1.mail_Comp_Fire, tblMailList_1.mail_Interest, tblMailList_1.mail_Comp_Jewelry, 
                                              tblMailList_1.mail_Comp_Ceramic
                       ORDER BY Expr7 DESC) AS tblLimiter INNER JOIN
                      dbo.tblMailList ON NOT (tblLimiter.Expr1 = dbo.tblMailList.mail_ID) INNER JOIN
                      dbo.tblBidder ON dbo.tblBidder.bidder_mail_id = dbo.tblMailList.mail_ID INNER JOIN
                      dbo.tblItem ON dbo.tblItem.item_bidder_number = dbo.tblBidder.bidder_number AND dbo.tblItem.item_sale_id = dbo.tblBidder.bidder_sale_id
WHERE     (dbo.tblMailList.mail_Comp_Art <> '1' OR
                      dbo.tblMailList.mail_Comp_Art IS NULL) AND (dbo.tblMailList.mail_Comp_IndArt <> '1' OR
                      dbo.tblMailList.mail_Comp_IndArt IS NULL) AND (dbo.tblMailList.mail_Comp_GenAm <> '1' OR
                      dbo.tblMailList.mail_Comp_GenAm IS NULL) AND (dbo.tblMailList.mail_Comp_Fire <> '1' OR
                      dbo.tblMailList.mail_Comp_Fire IS NULL) AND (NOT (dbo.tblMailList.mail_ID = tblLimiter.Expr1))
GROUP BY dbo.tblMailList.mail_Company, dbo.tblMailList.mail_Institution, dbo.tblMailList.mail_LastName, dbo.tblMailList.mail_FirstName, 
                      dbo.tblMailList.mail_NameTitle, dbo.tblMailList.mail_ID, dbo.tblMailList.mail_Comp_Art, dbo.tblMailList.mail_Comp_IndArt, 
                      dbo.tblMailList.mail_Comp_GenAm, dbo.tblMailList.mail_Comp_Fire, dbo.tblMailList.mail_Interest, dbo.tblMailList.mail_Comp_Jewelry, 
                      dbo.tblMailList.mail_Comp_Ceramic
ORDER BY Expr7 DESC

这个问题是，如果子查询选择前 0，则什么都不返回，这很明显，但我需要尝试，因为我已经尝试了很多.选择 50 时，它将返回 50 行，其中 SUM 总计较大.When 100 is selected, it returns the same 50 (because of the original top 50), but the SUM totals are twice as big...

The issue with this one is that if the sub query selects top 0, nothing is returned, which was fairly obvious, but I needed to try because I've tried a lot. When 50 is selected, it returns 50 rows with large SUM totals. When 100 is selected, it returns the same 50 (because of the original top 50), but the SUM totals are twice as big...

现在我也有这个到FROM"语句被反转的地方，与子查询本身的顺序相同，如下所示:

Now I also had this to where the "FROM" statement was reversed, in the same order as what is in the sub query itself, like this:

SELECT     TOP (50) tblMailList.mail_ID AS Expr1, tblMailList.mail_NameTitle AS Expr2, tblMailList.mail_FirstName AS Expr3, 
                      tblMailList.mail_LastName AS Expr4, tblMailList.mail_Company AS Expr5, tblMailList.mail_Institution AS Expr6, 
                      SUM(tblItem.item_pr + tblItem.item_premium) AS Expr7, tblMailList.mail_Comp_Art, tblMailList.mail_Comp_IndArt, tblMailList.mail_Comp_GenAm, 
                      tblMailList.mail_Comp_Fire, tblMailList.mail_Comp_Jewelry, tblMailList.mail_Comp_Ceramic, tblMailList.mail_Interest
FROM         dbo.tblItem AS tblItem INNER JOIN
                      dbo.tblBidder AS tblBidder ON tblItem.item_bidder_number = tblBidder.bidder_number AND tblItem.item_sale_id = tblBidder.bidder_sale_id INNER JOIN
                      dbo.tblMailList AS tblMailList ON tblBidder.bidder_mail_id = tblMailList.mail_ID LEFT OUTER JOIN
                          (SELECT     TOP (50) tblMailList_1.mail_ID AS Expr1, tblMailList_1.mail_NameTitle AS Expr2, tblMailList_1.mail_FirstName AS Expr3, 
                                                   tblMailList_1.mail_LastName AS Expr4, tblMailList_1.mail_Company AS Expr5, tblMailList_1.mail_Institution AS Expr6, 
                                                   SUM(tblItem_1.item_pr + tblItem_1.item_premium) AS Expr7, tblMailList_1.mail_Comp_Art, tblMailList_1.mail_Comp_IndArt, 
                                                   tblMailList_1.mail_Comp_GenAm, tblMailList_1.mail_Comp_Fire, tblMailList_1.mail_Comp_Jewelry, tblMailList_1.mail_Comp_Ceramic, 
                                                   tblMailList_1.mail_Interest
                            FROM          dbo.tblItem AS tblItem_1 INNER JOIN
                                                   dbo.tblBidder AS tblBidder_1 ON tblItem_1.item_bidder_number = tblBidder_1.bidder_number AND 
                                                   tblItem_1.item_sale_id = tblBidder_1.bidder_sale_id INNER JOIN
                                                   dbo.tblMailList AS tblMailList_1 ON tblBidder_1.bidder_mail_id = tblMailList_1.mail_ID
                            WHERE      (tblMailList_1.mail_Comp_Art <> '1' OR
                                                   tblMailList_1.mail_Comp_Art IS NULL) AND (tblMailList_1.mail_Comp_IndArt <> '1' OR
                                                   tblMailList_1.mail_Comp_IndArt IS NULL) AND (tblMailList_1.mail_Comp_GenAm <> '1' OR
                                                   tblMailList_1.mail_Comp_GenAm IS NULL) AND (tblMailList_1.mail_Comp_Fire <> '1' OR
                                                   tblMailList_1.mail_Comp_Fire IS NULL)
                            GROUP BY tblMailList_1.mail_Company, tblMailList_1.mail_Institution, tblMailList_1.mail_LastName, tblMailList_1.mail_FirstName, 
                                                   tblMailList_1.mail_NameTitle, tblMailList_1.mail_ID, tblMailList_1.mail_Comp_Art, tblMailList_1.mail_Comp_IndArt, 
                                                   tblMailList_1.mail_Comp_GenAm, tblMailList_1.mail_Comp_Fire, tblMailList_1.mail_Interest, tblMailList_1.mail_Comp_Jewelry, 
                                                   tblMailList_1.mail_Comp_Ceramic
                            ORDER BY Expr7 DESC) AS tblLimiter ON tblLimiter.Expr1 > 0
WHERE     (tblMailList.mail_Comp_Art <> '1' OR
                      tblMailList.mail_Comp_Art IS NULL) AND (tblMailList.mail_Comp_IndArt <> '1' OR
                      tblMailList.mail_Comp_IndArt IS NULL) AND (tblMailList.mail_Comp_GenAm <> '1' OR
                      tblMailList.mail_Comp_GenAm IS NULL) AND (tblMailList.mail_Comp_Fire <> '1' OR
                      tblMailList.mail_Comp_Fire IS NULL) AND (NOT (tblMailList.mail_ID = tblLimiter.Expr1))
GROUP BY tblMailList.mail_Company, tblMailList.mail_Institution, tblMailList.mail_LastName, tblMailList.mail_FirstName, tblMailList.mail_NameTitle, 
                      tblMailList.mail_ID, tblMailList.mail_Comp_Art, tblMailList.mail_Comp_IndArt, tblMailList.mail_Comp_GenAm, tblMailList.mail_Comp_Fire, 
                      tblMailList.mail_Interest, tblMailList.mail_Comp_Jewelry, tblMailList.mail_Comp_Ceramic
ORDER BY Expr7 DESC

但是，这与其他方式完全相同(返回结果的方式).

However, this works the exact same way as the other way (in the way the results are returned).

我真的希望我能做一个AND NOT IN(子查询)"，因为我可以毫无问题地完成这些工作.但是由于 Expr7 中的 SUM，我不能这样做.而且我是一个 MySQL 人，所以我对 SQL 知之甚少.我希望我提供了足够的信息.如果没有，请告诉我.感谢所有回复.

I really wish I could do a "AND NOT IN (sub query)", because I can make those work without an issue. But because of the SUM in Expr7, I cannot do that. And I'm a MySQL guy, so I don't know a whole lot about SQL. I hope I gave enough information. If not, just let me know. Thanks for all replies.

推荐答案

不要使用 TOP 50 进行分页，而是使用 ROW_NUMBER 然后使用 where

Instead of using TOP 50 for your pagination use ROW_NUMBER and then use the where 

WITH CTE AS (
SELECT     
           ROW_NUMBER() OVER (ORDER BY  SUM(dbo.tblItem.item_pr + dbo.tblItem.item_premium) ) RN,
           dbo.tblMailList.mail_ID AS Expr1, dbo.tblMailList.mail_NameTitle AS Expr2, dbo.tblMailList.mail_FirstName AS Expr3, 
           dbo.tblMailList.mail_LastName AS Expr4, dbo.tblMailList.mail_Company AS Expr5, dbo.tblMailList.mail_Institution AS Expr6, 
           SUM(dbo.tblItem.item_pr + dbo.tblItem.item_premium) AS Expr7, 
           dbo.tblMailList.mail_Comp_Art, dbo.tblMailList.mail_Comp_IndArt, 
           dbo.tblMailList.mail_Comp_GenAm, dbo.tblMailList.mail_Comp_Fire, dbo.tblMailList.mail_Comp_Jewelry, dbo.tblMailList.mail_Comp_Ceramic, 
 .....
)
SELECT * FROM CTE WHERE rn Between 50 and 100

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