Question

我是oracle sql的新手。我正在尝试执行以下查询

SQL> select movie.movie_title, movie.release_year, cast.movie_title, cast.release_year
from MOVIE movie, CAST_MEMBER cast 



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ERROR at line 1:
ORA-00933: SQL command not properly ended

查询有效如果我没有加入actor表但我试图从ACTOR表中提取actor名称。我看过其他问题，但无法修复。如果有人可以指导我出错的地方。

谢谢

Answer 1

where子句必须在所有连接之后出现。

select movie.movie_title, movie.release_year, cast.movie_title, cast.release_year
from MOVIE movie, CAST_MEMBER cast 
join ACTOR actor on(actor.actor_name = cast.actor_name) 
where movie.movie_title = cast.movie_title and movie.release_year = cast.release_year 
group by cast.movie_title, cast.release_year, cast.actor_name;

另外，你不应该混合两个连接符号，所以最好写：

select movie.movie_title, movie.release_year, cast.movie_title, cast.release_year
from MOVIE movie
join CAST_MEMBER cast on (movie.movie_title = cast.movie_title and movie.release_year = cast.release_year)
join ACTOR actor on(actor.actor_name = cast.actor_name) 
group by cast.movie_title, cast.release_year, cast.actor_name;

Answer 2

我建议您不要混合使用连接语法：

select distinct 
movie.movie_title, movie.release_year, 
cast.movie_title, cast.release_year
from MOVIE movie
inner join CAST_MEMBER cast 
on movie.movie_title = cast.movie_title and movie.release_year = cast.release_year
inner join ACTOR actor 
on actor.actor_name = cast.actor_name;

我还删除了该组，并将其替换为不同的

SQL命令无法连接表

2 个答案: