将MS SQL函数转换为Oracle函数会引发错误

我试图将MS SQL函数转换为Oracle函数，但我遇到了错误，我无法理解是什么错误或如何修复它们

有人能帮忙吗

CREATE OR REPLACE FUNCTION ItemsSold 
(
    p_PrdID nvarchar2(50),  
    p_Cst nvarchar2(50)
)
RETURN Number
AS
 v_Price NUMBER(18,2);
BEGIN

 SELECT (Min(s.Price)*i.Qty) AS MinP into v_Price
FROM            Customers AS c INNER JOIN
                         CustOrders AS o ON c.Name = o.Cust INNER JOIN
                         Sales AS i ON i.Order = o.Order INNER JOIN
                         Purchases AS s ON i.Item = s.Item
WHERE        i.Item = p_PrdID AND o.Cust = p_Cst
group by i.Qty)

    RETURN v_Price;



END;

错误

Error(4,23): PLS-00103: Encountered the symbol "(" when expecting one of the following:     := . ) , @ % default character The symbol ":=" was substituted for "(" to continue. 
Error(6,18): PLS-00103: Encountered the symbol "(" when expecting one of the following:     := . ) , @ % default character The symbol ":=" was substituted for "(" to continue. 
Error(17,29): PLS-00103: Encountered the symbol "INNER" when expecting one of the following:     , ; for group having intersect minus order start union where    connect 

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开括号错误与变量声明有关——在PL/SQL中，不允许为变量分配大小（因此，让它们为NVARCHAR2，不能说NVARCHAR2（50））

第三个错误与表名别名的Oracle语法有关-Oracle将关键字用作列别名（可选），但不允许将其用于表名别名

删除变量和关键字的NVARCHAR2的大小规范，与别名c之前一样（在错误消息指示的行上），然后查看发生了什么

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祝你好运

按i.Qty分组后没有分号）啊，错过了你看到的明显问题，哦，好吧，多眼睛是一个更好的解决方案。将在接下来的30分钟内进行测试，然后标记答案，这是为了回答，并将“按i.Qty分组”替换为“按i.Qty分组”