java - 快速Java SQL问题

Question

我的代码:

String sql = "SELECT Publisher.Name, Book.Title, ShopOrder.OrderDate, SUM(OrderLine.Quantity) AS No_Books, "
            + "SUM(OrderLine.UnitSellingPrice * Orderline.Quantity) AS Total_Price"
            + "FROM Publisher, Book, OrderLine, ShopOrder"
            + "WHERE OrderLine.BookID = Book.BookID AND ShopOrder.ShopOrderID = OrderLine.ShopOrderID AND Publisher.PublisherID = Book.PublisherID AND Publisher.PublisherID = " + id
            + "GROUP BY book.title, publisher.name, ShopOrder.OrderDate"
            + "ORDER BY ShopOrder.OrderDate, Book.Title";

结果错误:

syntax error at or near "Publisher" at char position 166 (Just after the FROM clause)

Answer 1

缺少空格

你的字符串是 ...S Total_PriceFROM Publisher、书籍、OrderLine、ShopOrderWHERE O...

您应该使用:

String sql = "SELECT Publisher.Name, Book.Title, ShopOrder.OrderDate, SUM(OrderLine.Quantity) AS No_Books, "
        + " SUM(OrderLine.UnitSellingPrice * Orderline.Quantity) AS Total_Price"
        + " FROM Publisher, Book, OrderLine, ShopOrder"
        + " WHERE OrderLine.BookID = Book.BookID AND ShopOrder.ShopOrderID = OrderLine.ShopOrderID AND Publisher.PublisherID = Book.PublisherID AND Publisher.PublisherID = " + id
        + " GROUP BY book.title, publisher.name, ShopOrder.OrderDate"
            + " ORDER BY ShopOrder.OrderDate, Book.Title";