Question

我正在尝试按如下方式创建视图：

CREATE OR REPLACE VIEW film_list
AS
SELECT 
    film.film_id AS FID, film.title AS title, film.description AS description, 
    category.name AS category, film.rental_rate AS price,
    film.length AS length, film.rating AS rating, 
    LISTAGG(actor.first_name ||'  '|| actor.last_name, ', ') WITHIN GROUP AS actors
FROM 
    category LEFT JOIN film_category ON category.category_id = film_category.category_id 
                 LEFT JOIN film ON film_category.film_id = film.film_id
                        JOIN film_actor ON film.film_id = film_actor.film_id
                        JOIN actor ON film_actor.actor_id = actor.actor_id
GROUP BY 
     film.film_id, film.title, film.description, category.name, 
     film.rental_rate, film.length,  film.rating;

它给出了以下错误：

Error at line 1
ORA-00906: missing left parenthesis

我没有看到任何正确的括号打开，你的帮助将不胜感激！感谢

Answer 1

您收到错误：

LISTAGG(actor.first_name ||'  '|| actor.last_name, ', ') WITHIN GROUP AS actors

将其更改为：

LISTAGG(actor.first_name ||'  '|| actor.last_name, ', ') WITHIN GROUP  (ORDER BY actor.first_name) AS actors

Answer 2

WITHIN GROUP有一个括号括起来的order by子句。见here

试图创建一个视图

2 个答案: