我无法插入 sql

Question

IMDB database Image to database structure FletNix

INSERT INTO FletNix_2.dbo.Movie_Cast
    SELECT cast(Pid AS int) AS person_id,
    cast(Mid AS int) AS movie_id,
    LEFT(Role, 255) AS role
    FROM MYIMDB.dbo.Imported_Cast

INSERT INTO FletNix_2.dbo.Movie_Directors
    SELECT cast(Did AS int) AS person_id,
    cast(Mid AS int) AS movie_id
    FROM MYIMDB.dbo.Imported_Movie_Directors

错误消息：

Msg 2627, Level 14, State 1, Line 71 Violation of PRIMARY KEY constraint 'pk_moviecast'. Cannot insert duplicate key in object 'dbo.Movie_Cast'. The duplicate key value is ((Unknown)).

Msg 547, Level 16, State 0, Line 77 The INSERT statement conflicted with the FOREIGN KEY constraint "fk_directors_Person". The conflict occurred in database "FletNix_2", table "dbo.Person", column 'person_id'.

我知道我需要使用 distinct，但是当我这样做时

INSERT INTO FletNix_2.dbo.Movie_Cast
    SELECT cast(Pid AS int) AS person_id,
    cast(Mid AS int) AS movie_id,
    distinct LEFT(Role, 255) AS role
    FROM MYIMDB.dbo.Imported_Cast

报错： distinct

附近的语法不正确

当我在 SELECT 之后放置 distinct 时，我仍然得到一个错误：

Violation of PRIMARY KEY constraint 'pk_moviecast'. Cannot insert duplicate key in object 'dbo.Movie_Cast'. The duplicate key value is ((Unknown))

和

The INSERT statement conflicted with the FOREIGN KEY constraint "fk_directors_Person". The conflict occurred in database "FletNix_2", table "dbo.Person", column 'person_id'.

Answer 1

distinct 应该在 select

之后

    INSERT INTO FletNix_2.dbo.Movie_Cast
    SELECT distinct cast(Pid AS int) AS person_id,
    cast(Mid AS int) AS movie_id,
    LEFT(Role, 255) AS role
    FROM MYIMDB.dbo.Imported_Cast

因为你的角色列是主要的所以它不能重复所以我使用 row_number() 来生成唯一编号

     select 
    cast(Pid AS int) AS person_id,
    cast(Mid AS int) AS movie_id,        
    row_number()over( order by (select null)) as role
    FROM MYIMDB.dbo.Imported_Cast

我无法插入 sql

I cant insert into sql

sql

sql-server-2008