如果条件在Oracle Package中给出错误

Question

我是oracle数据库的新手，我创建了一个包含if else语句的PL / SQL包。它包含分别用于插入，更新和删除的三个过程。这给了我错误。任何人都可以帮我解决这个问题..

create or replace 
    PACKAGE body USERS_tapi
    IS
      -- insert
    PROCEDURE ins(
        p_FIRSTNAME IN USERS.FIRSTNAME%type ,
        p_ADDRESS   IN USERS.ADDRESS%type ,
        p_ROLEID    IN USERS.ROLEID%type DEFAULT NULL ,
        p_USERNAME  IN USERS.USERNAME%type ,
        p_PASSWORD  IN USERS.PASSWORD%type ,
        p_USERID    IN USERS.USERID%type ,
        p_LASTNAME  IN USERS.LASTNAME%type,
        O_val OUT NUMBER
        )
    IS
    BEGIN
    select count(*) as cnt  from USERS where username=p_USERNAME and password=p_PASSWORD;
        if cnt = 0 then
           INSERT INTO USERS(
            FIRSTNAME ,
            ADDRESS ,
            ROLEID ,
            USERNAME ,
            PASSWORD ,
            USERID ,
            LASTNAME
          )
          VALUES
          (
            p_FIRSTNAME ,
            p_ADDRESS ,
            p_ROLEID ,
            p_USERNAME ,
            p_PASSWORD ,
            USERS_SEQ.nextval ,
            p_LASTNAME
          );


        O_val:=0;
         else if cnt > 0 then
        O_val:=1;
        else 
        O_val:=2;
        END IF;
        return O_val;
    END;
    -- update

PROCEDURE upd
  (
    p_FIRSTNAME IN USERS.FIRSTNAME%type ,
    p_ADDRESS   IN USERS.ADDRESS%type ,
    p_ROLEID    IN USERS.ROLEID%type DEFAULT NULL ,
    p_USERNAME  IN USERS.USERNAME%type ,
    p_PASSWORD  IN USERS.PASSWORD%type ,
    p_USERID    IN USERS.USERID%type ,
    p_LASTNAME  IN USERS.LASTNAME%type
  )
IS
BEGIN
  UPDATE USERS
  SET FIRSTNAME = p_FIRSTNAME ,
    ADDRESS     = p_ADDRESS ,
    ROLEID      = p_ROLEID ,
    USERNAME    = p_USERNAME ,
    PASSWORD    = p_PASSWORD ,
    LASTNAME    = p_LASTNAME
  WHERE USERID  = p_USERID;
END;
-- del
PROCEDURE del(
    p_USERID IN USERS.USERID%type )
IS
BEGIN
  DELETE FROM USERS WHERE USERID = p_USERID;
END;
END USERS_tapi;

Answer 1

在以下行中使用elsif代替else if：

else if cnt > 0 then

前者只是你的条件块中的另一个案例。 后一种语法是在第一个条件块的else部分中启动嵌套条件块。该嵌套块需要自己的END IF才能工作。

您也可以使用CASE声明：

CASE
    WHEN cnt = 0 then
        -- insert statement
        O_val:=0;
    WHEN cnt > 0 then
        O_val:=1;
    else 
        O_val:=2;
END CASE;