Question

警告，“丑陋”查询警报（MS SQL Server 2008）：

SELECT BaseDocs.* FROM (
  SELECT ROW_NUMBER() OVER (ORDER BY BaseDocs.DateUpdated DESC) AS Row, BaseDocs.* 
    FROM BaseDocs INNER JOIN DocCats ON BaseDocs.DocId = DocCats.DocId  
    WHERE DocCats.CatId IN (4) AND BaseDocs.BaseId = 1
  ) AS Paged 
  WHERE Row > 0 AND Row <=3

此查询引发此错误：

列前缀“BaseDocs”与表名或别名不匹配查询中使用的名称。

此查询针对这些表：

BaseDocs Table
 - DocId PK
 - BaseId FK
 - ...

DocCategories Table
 - CatId PK
 - ...

DocCats (join) Table
 - DocId FK PK 
 - CatId FK PK

在对这个问题进行“黑客攻击”这么久之后，我认为我的大脑正在煎炸......但它很接近，我能感受到它。提前谢谢！

Answer 1

只是不要在SELECT中指定一个表别名 - 该表别名仅在您的子查询中可见！

SELECT *
FROM 
   (SELECT 
        ROW_NUMBER() OVER (ORDER BY BaseDocs.DateUpdated DESC) AS Row, 
        BaseDocs.* 
    FROM BaseDocs 
    INNER JOIN DocCats ON BaseDocs.DocId = DocCats.DocId  
    WHERE 
         DocCats.CatId IN (4) 
         AND BaseDocs.BaseId = 1
  ) AS Paged 
WHERE 
   Row > 0 AND Row <= 3

或者：使用给定子查询的别名：

SELECT Paged.* .....

为什么这个“分页”查询会抛出“与表名或别名不匹配”错误？

1 个答案: