Question

我有以下查询在TSQL中正常工作

SELECT     
    shoppingcart_1.price, shoppingcart_1.stid, course.isbn, 
    book.BookTitle, course.Course_ID, schedule.stid AS Expr1
FROM         
    book 
INNER JOIN 
    shoppingcart AS shoppingcart_1 
INNER JOIN 
    schedule ON shoppingcart_1.cid = schedule.course_ID 
INNER JOIN 
    course ON schedule.course_ID = course.Course_ID 
    ON book.isbn = course.isbn
WHERE     
    (shoppingcart_1.stid = '20070004')

但是当我在Mysql中运行它时，它会在行上显示错误

INNER JOIN course ON schedule.course_ID = course.Course_ID ON book.isbn = course.isbn

错误文字

1064 - 您的SQL语法出错;检查与MySQL服务器版本对应的手册，以获得正确的语法靠近'ON book.isbn = course.isbn WHERE（shoppingcart_1.stid = '20070004'）第6行限制0'

我是第一次在mysql中编写查询，请帮忙

Answer 1

好像你的联盟有点混乱。我试着清理它。看看这是否适合你

SELECT shoppingcart_1.price, shoppingcart_1.stid, course.isbn, book.BookTitle, course.Course_ID, schedule.stid AS Expr1
FROM book 
INNER JOIN course ON book.isbn = course.isbn
INNER JOIN schedule ON course.Course_ID = schedule.course_ID  
INNER JOIN shoppingcart AS shoppingcart_1 ON schedule.course_ID = shoppingcart_1.cid
WHERE shoppingcart_1.stid = '20070004'

请注意我如何将书籍加入课程，然后安排课程，然后安排到购物车。然后使用WHERE子句指定其他条件。

Mysql多个内部联接不起作用

1 个答案: