ORA 00936 缺少表达式

Posted 2023-04-14

【中文标题】ORA 00936 缺少表达式

【英文标题】：ORA 00936 Missing Expression

【发布时间】：2014-10-05 16:32:27

【问题描述】：

我浏览了该网站，但无法找到我的问题的答案，许多问题很接近，但都不相同。我正在尝试从两个表中选择数据并加入五个。我没有为其选择信息的三个是publisher、order_items 和book_order。它们只是 ERD 中的表格。我不断收到 ORA 00936：我的 FROM 行中缺少表达式。但我不知道是什么原因造成的。所有表都准确表示，唯一不同的是 SELECT 行中的 TO_CHAR 语句。我认为这可能是问题所在。

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');

【问题讨论】：

FROM前有逗号。

你应该学会使用正确的显式 join 语法，尽管这与这个特定问题无关。

【参考方案1】：

from 子句前有一个多余的逗号 (,)：

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');