Question

我为每个作者创建了不同的表，因为每个作者表都有不同的列名。

表作者

 Author_ID   BookName
   1         Book1
   1         Book2
   1         Book3
   1         Book4
   1         Book5

表作者书籍

FirstName   LastName  BookName
 Rock        Smith    Book1
 Rock        Smith    Book2
 Rock        Smith    Book3
 Rock        Smith    Book4
 Rock        Smith    Book4

我想要这样的结果结果表

Author_ID    Author_Table
   1          Rock_Smith
   2          Edward_Thomas

表New_Authors

FirstName   LastName  BookName
 Rock        Smith    Book1
 Rock        Smith    Book2
 Rock        Smith    Book3
 Rock        Smith    Book4
 Rock        Smith    Book4


Is it possible to get all the Rock_Smith table info on querying New_Authors table?

Talbe Rock_Smith

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                            <td><b>Apellido paterno</b></td>
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Answer 1

这是LEFT JOIN实现的简单的一对多关系：

SELECT a.LastName, a.FirstName, b.BookName
FROM Authors a LEFT JOIN AuthorBooks b ON b.Author_ID = a.Author_ID
ORDER BY LastName, FirstName, BookName

Answer 2

要从这两个表中返回数据，您可以运行此查询：

SELECT a.FirstName, A.LastName, b.BookName
FROM Author A inner join AuthorBooks B on A.Author_ID = B.Author_ID

如果您想根据查询创建第3个表：

步骤1）创建表格。

步骤2）运行您的查询：

SELECT a.FirstName, A.LastName, b.BookName
INTO [NewTable]
FROM Author A inner join AuthorBooks B on A.Author_ID = B.Author_ID

基于一个到另一个表的一行创建一个表

2 个答案: