"表中不存在PropertyID

Question

正在努力查看向 Agents 表添加外键的问题。 我收到错误“PropertyID 不存在于表中”。 这是相关的代码：

CREATE TABLE Properties (
PropertyID INT(8),
Address VARCHAR(50) NOT NULL,
Level TINYINT(1) NOT NULL,
PropertyValue INT(10) NOT NULL,
CONSTRAINT PRIMARY KEY (PropertyID)
);

CREATE TABLE Agents (
AgentID INT(8) AUTO_INCREMENT,
FirstName VARCHAR(50) NOT NULL,
LastName VARCHAR(50) NOT NULL, 
PropertiesManaged VARCHAR (50) NOT NULL,
PhoneNumber VARCHAR (12),
CONSTRAINT PRIMARY KEY (AgentID),
CONSTRAINT PropertiesManaged FOREIGN KEY (PropertyID) REFERENCES Properties (PropertyID)
);

Answer 1

您必须定义列：

CREATE TABLE Agents (
    AgentID INT(8) AUTO_INCREMENT,
    FirstName VARCHAR(50) NOT NULL,
    LastName VARCHAR(50) NOT NULL, 
    PropertiesManaged VARCHAR (50) NOT NULL,
    PhoneNumber VARCHAR (12),
    PropertyId INT(8),
----^
    CONSTRAINT PRIMARY KEY (AgentID),
    CONSTRAINT PropertiesManaged FOREIGN KEY (PropertyID) REFERENCES Properties (PropertyID)    
);