我有一个语法错误，帮我

Question

create or replace TRIGGER SET_HOLDER_IN_ONLINE_DOC 
BEFORE INSERT ON tasks 
FOR EACH ROW 
DECLARE 
id, repl_id NUMBER; 
BEGIN 
    IF :new.holder_role_id = 10 THEN 
    SELECT user_id, repl_user_id INTO id, repl_id FROM roles 
     WHERE roles.id=10; 
     IF repl_id = 0 THEN 
     :new.holder_user_id := id; 
     ELSE 
      WHILE repl_id > 0 
      LOOP 
       SELECT user_id, repl_user_id INTO id, repl_id FROM roles 
       WHERE user_id=repl_id; 
      END LOOP; 
      :new.holder_user_id := id; 
     END IF; 
    END IF; 
END; 

Answer 1

你不能两个变量共同声明，你可以在其他一些语言，所以这样的：

DECLARE 
id, repl_id NUMBER; 
BEGIN 

应该是：

DECLARE 
id NUMBER: 
repl_id NUMBER; 
BEGIN