存储过程中的外键约束 - SQL Server

Question

我有以下存储过程,这里有两个表,Movie和Director.在创建或添加新电影时,两者都需要更新.你如何处理存储过程中的FK？在这种情况下,FK是director_id.它是主键,Director但是FK中Movie 我是否需要像这样指定它两次？我遇到了冲突错误

CREATE PROCEDURE Book_Book_Creation
    @Book_id_arg DECIMAL(12),    
    @author_id_arg DECIMAL(12),    
    @type_id_arg DECIMAL(12),     
    @title_arg VARCHAR(64),      -
    @copyright_arg DECIMAL(4),   
    @dauthor_id_2_arg DECIMAL(12),    
    @author_fname_arg VARCHAR (64), 
    @author_lname_arg VARCHAR (64)  
AS
BEGIN 
    INSERT INTO Book(Book_id, author_id,genre_id, title, copyright)
    VALUES (@author_arg, @author_id_arg,  @type_id_arg, @title_arg, @copyright_arg);
    INSERT INTO Author(author_id, author_fname, author_lname)
    VALUES (@director_id_2_arg, @director_fname_arg, @director_lname_arg)
END;

EXECUTE Book_Book_Creation 32,32,1,'Tempting',2013,32,'Taylor','Mendez';

Answer 1

基本上,你只需要这样做:

• 先插入Director表格
• 从该表中获取新插入的ID(假设该Director_Id列是您的主键并且是类型INT IDENTITY)
• 然后Movie使用该新ID 插入表中

像这样的东西:

DECLARE @NewDirectorID INT

INSERT INTO Director (Director_id, Director_fname, director_lname)
VALUES (@director_id_2_arg, @director_fname_arg, @director_lname_arg)

SELECT @NewDirectorID = SCOPE_IDENTITY()

INSERT INTO Movie (Movie_id, director_id,genre_id, title, copyright)
VALUES (@movie_id_arg, @NewDirectorID,  @genre_id_arg, @title_arg, @copyright_arg);

我不明白为什么你会把导演的ID作为参数传递 - 两次!