选择逗号分隔值sql存储过程

我有三张桌子：

书架

->

pkid

和其他列

book\u author

->

pkid

，

fkid\u book\u shelf

，

fkid\u author

作者

->

pkid

，

姓名

等

对于中

book\u shelf

中的一行，希望以逗号分隔的形式获取作者姓名。如果书架实体有两个作者，则在

book\u author

表中插入两行

这是我试过的

(select BookShelf.pkid as SrNo,stuff((select ',' + a.name
    from 
    lib.book_shelf bs inner join
    lib.book_author ba on bs.pkid=ba.fkid_book_shelf
    inner join lib.author a on a.pkid=ba.fkid_authors 
    for xml path ('')
), 1, 1, '') as Author from lib.book_shelf BookShelf)

---

但是它会为每个

书架

行选择所有作者姓名。

希望这对您有所帮助

CREATE TABLE BookShelf(ID INT)
CREATE TABLE BookAuthor(ID INT, BookShelf INT, AuthorID INT)
CREATE TABLE Author(ID INT, Name VarChar(50))
GO

INSERT INTO BookShelf VALUES(1)
INSERT INTO BookShelf VALUES(2)

INSERT INTO Author VALUES(1,'Author1')
INSERT INTO Author VALUES(2,'Author2')
INSERT INTO Author VALUES(3,'Author3')
INSERT INTO Author VALUES(4,'Author4')


INSERT INTO BookAuthor VALUES(1,1,1)
INSERT INTO BookAuthor VALUES(1,1,2)
INSERT INTO BookAuthor VALUES(1,2,3)
INSERT INTO BookAuthor VALUES(1,2,4)

SELECT 
    BookShelf.ID, 
    STUFF((SELECT ',' + Author.Name FROM BookAuthor INNER JOIN Author ON BookAuthor.AuthorID = Author.ID WHERE BookAuthor.BookShelf = BookShelf.ID FOR XML PATH('')),1,1,'')
FROM 
    BookShelf 

---

如果书架上有一个authorth，则需要一个“，”（逗号）。XML的

位不太正确。请尝试对XML路径（“”）、1、1、“”）执行
。
。已更新该语句。。现在验证。帮助很大，非常感谢