可以在视图中使用LISTAGG吗？

Question

我有一个正常工作的sql语句，并产生正确的结果。

SELECT "StoreId",  LISTAGG("ProductCategory"
                          || ':'
                          || '('
                          || ProductIds
                          || ')', ', ') WITHIN GROUP (
ORDER BY "ProductCategory") AS ProductsAndCategories
FROM
  (SELECT "StoreId",
    "ProductCategory",
    LISTAGG("ProductId", ',') WITHIN GROUP (
  ORDER BY "ProductId") AS ProductIds
  FROM SUPERMARKET
  GROUP BY "StoreId",
    "ProductCategory"
  ) s
GROUP BY "StoreId";

但是，如果我使用完全相同的语句并将其放在View中，我得到的编译器错误并没有多大意义（见下文）。有人告诉我这是有效的，因为使用LISTAGG和视图没有任何限制，但它显然是错误的。我不确定我的陈述有什么问题。有人能指出我吗？

Answer 1

您的问题似乎与GUI有关。

您可以使用以下方式创建视图：

create view v_storeproducts as
    SELECT "StoreId", 
            LISTAGG("ProductCategory"
                              || ':'
                              || '('
                              || ProductIds
                              || '
                   )', ', ') WITHIN GROUP (ORDER BY "ProductCategory") AS ProductsAndCategories
    FROM (SELECT "StoreId",
                 "ProductCategory",
                  LISTAGG("ProductId", ',') WITHIN GROUP (ORDER BY "ProductId") AS ProductIds
          FROM SUPERMARKET
          GROUP BY "StoreId",
          "ProductCategory"
         ) s
    GROUP BY "StoreId";