sql - ORA 00936缺少表达

我浏览了该站点，但找不到我的问题的答案，很多答案很接近，但不尽相同。我正在尝试从两个表中选择数据并加入五个表。我没有为其选择信息的三个是Publisher，order_items和book_order。它们只是ERD中符合要求的表格。我一直在收到ORA 00936:FROM行上缺少表达式。但是我不知道是什么原因造成的。所有表均准确表示，唯一不同的是SELECT行中的TO_CHAR语句。我认为可能是问题所在。

SELECT book_customer.firstname, book_customer.lastname,
TO_CHAR(book_order.orderdate,'MM/DD/YYYY') AS "Order Date",
  FROM book_customer, book_order, order_items, books, publisher
    WHERE (book_customer.customerid = book_order.customerid)
      AND (book_order.orderid = order_items.orderid)
      AND (order_items.bookid = books.bookid)
      AND (books.pubid = publisher.pubid)
      AND (publisher.publishername = 'printing with us');

最佳答案

在,子句之前，您有一个多余的逗号(from):

SELECT book_customer.firstname, book_customer.lastname,
TO_CHAR(book_order.orderdate,'MM/DD/YYYY') AS "Order Date" -- Comma removed here
  FROM book_customer, book_order, order_items, books, publisher
    WHERE (book_customer.customerid = book_order.customerid)
      AND (book_order.orderid = order_items.orderid)
      AND (order_items.bookid = books.bookid)
      AND (books.pubid = publisher.pubid)
      AND (publisher.publishername = 'printing with us');

关于sql - ORA 00936缺少表达，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/26204731/