Question

似乎我的过程不接受我要插入到客户表中的值。但为什么？ cust_id列有什么问题？

BEGIN

do_new_customer('650707-1111', 'Tito', 'Ortiz', 'qwerTY');

do_new_customer('560126-1148', 'Margreth', 'Andersson', 'olle85');

do_new_customer('840317-1457', 'Mary', 'Smith', 'asdfgh');

do_new_customer('861124-4478', 'Vincent', 'Ortiz', 'qwe123');

COMMIT;

END;

这是我的程序：

create or REPLACE procedure do_new_customer
    (p_cust_id in varchar2, 
     p_first_name in varchar2, 
     P_last_name in varchar2, 
     P_passwd in varchar2)
as     
     v_cust_id number(6);    
begin     
    insert into Customer (cust_id, first_name, last_name, passwd)    
    values (v_cust_id, P_First_name, P_Last_name, P_passwd);    

    Commit;
end;

Answer 1

该值为null：我认为您忘记了将p_cust_id转换为数字并将其存储在v_cust_id中的步骤

create or REPLACE procedure do_new_customer
(p_cust_id in varchar2, p_first_name in varchar2, P_last_name in varchar2, P_passwd in varchar2)
as   
  --YOU DIDN'T SET THIS TO A VALUE SO IT'S NULL  
  v_cust_id number(6);   

begin     
  insert into Customer( cust_id, first_name, last_name, passwd)    

  --STILL NULL WHEN YOU CAME TO USE IT
  values(v_cust_id, P_First_name,P_Last_name,P_passwd);    
Commit;

end;

尝试进行SET v_cust_id = p_cust_id::int;或类似操作将varchar转换为大数值，并为v_cust_num赋予一个值？

或者如蒂姆所说，直接将其作为p_cust_id传递，让Postgres找出转换。

或者使p_cust_id与表中列的类型匹配并一起摆脱v_cust_id

Answer 2

我认为这里的问题是您要传递from c in northwindEntities.Categories join p in northwindEntities.Products on c.CategoryID equals p.CategoryID group c by c.CategoryName into Category select new { CategoryName = Category.Key, Products = Category.ToList() };作为v_cust_id列值，但是此值在任何地方都没有定义。我看不出您为什么不仅仅使用cust_id子句中的所有输入的任何原因：

VALUES

Answer 3

create or REPLACE procedure do_new_customer
    (p_cust_id in varchar2, 
     p_first_name in varchar2, 
     P_last_name in varchar2, 
     P_passwd in varchar2)
as     
     v_cust_id number(6);    
begin     
    insert into Customer values (p_cust_id, P_First_name, P_Last_name, P_passwd);    

    Commit;

end;

Answer 4

未为“插入操作”设置变量v_cust_id，但定义了为什么获得空值的原因。您确定要执行的操作是将p_cust_id插入客户表，以便相反：

 insert into Customer (cust_id, first_name, last_name, passwd)    
    values (v_cust_id, P_First_name, P_Last_name, P_passwd);

重写插入内容：

 insert into Customer (cust_id, first_name, last_name, passwd)    
     values (P_cust_id, P_First_name, P_Last_name, P_passwd);

功能将是：

create or REPLACE procedure do_new_customer
    (p_cust_id in varchar2, 
     p_first_name in varchar2, 
     P_last_name in varchar2, 
     P_passwd in varchar2)
as     
      v_cust_id number(6);   
begin     
    insert into Customer (cust_id, first_name, last_name, passwd)    
    values (P_cust_id, P_First_name, P_Last_name, P_passwd);    

   Commit;
end;

Answer 5

-没有使用此变量-'v_cust_id number（6）'; -创建过程为-

CREATE OR REPLACE PROCEDURE do_new_customer 
(
p_cust_id IN VARCHAR2,
p_first_name IN VARCHAR2, 
P_last_name IN VARCHAR2, 
P_passwd IN VARCHAR2
)
AS    
BEGIN
    INSERT INTO Customer (cust_id, first_name, last_name, passwd)    
    VALUES (p_cust_id, p_first_name, P_last_name, P_passwd);    
COMMIT;
END;

该过程将引发错误“无法在“ CUSTOMER” .CUST_ID”中插入空值，尽管该值不为空

5 个答案: