Question

有人可以帮我解决我的错误;

-- Create ordered
CREATE TABLE ordered(
orderID TINYINT UNSIGNED AUTO_INCREMENT,
total_cost DECIMAL(10,2),
customerID TINYINT UNSIGNED,
offercode VARCHAR(15),
CONSTRAINT ordered_pk PRIMARY KEY (orderID)
CONSTRAINT ordered_customerID_fk FOREIGN KEY (customerID) REFERENCES customer(customerID) 
    ON UPDATE CASCADE
CONSTRAINT ordered_offercode_fk FOREIGN KEY (offercode) REFERENCES offer(offercode)
    ON UPDATE CASCADE
);


DESCRIBE ordered;



-- Create line item
CREATE TABLE line_item(
item_number TINYINT UNSIGNED,
orderID TINYINT UNSIGNED,
quantity TINYINT,
shipping_amount DECIMAL(6,2)
CONSTRAINT line_item_pk PRIMARY KEY (item_number, orderID)
CONSTRAINT line_item_item_number_fk FOREIGN KEY (item_number) REFERENCES item(item_number)
    ON UPDATE CASCADE,
CONSTRAINT line_item_orderID_fk FOREIGN KEY (orderID) REFERENCES ordered(orderID)
    ON UPDATE CASCADE
    ON DELETE CASCADE
);

DESCRIBE line_item;

我的customerID外键的ORDERED表出错，而主键上的line_item表出错。

谢谢！

Answer 1

您的第一个错误，因为Func<double[],double> formula = ...表不存在。

第二个错误，因为此行customer，在结尾shipping_amount DECIMAL(6,2)添加逗号

即使您认为自己会从主键错误中运行，但由于它不存在，您将面临shipping_amount DECIMAL(6,2),表错误。

MySQL语法中的表键错误

1 个答案: