Sql 提示未获取输入并获取编译器错误

我试图使用Oracle Developer在PL/SQL中编写一个过程，该过程从提示符获取输入，如果没有输入，则使用异常处理程序输出。我的提示窗口显示“请输入p_first_name的值”，而不是“…”中的值。在提示中输入数据后，出现以下错误：

代码 输入第一个、最后一个和标题后，我希望打印：

如果任何值为NULL，我希望打印异常处理程序

到目前为止，我只得到以下错误：

试试这个

    CREATE OR REPLACE PROCEDURE print_name (first_name IN varchar, last_name 
            varchar, title varchar) IS






first_null EXCEPTION;
last_null EXCEPTION;
title_null EXCEPTION;

BEGIN




IF first_name IS NULL THEN
raise first_null;
END IF;

IF last_name IS NULL THEN
raise last_null;
END IF;

IF title IS NULL THEN
raise title_null;
END IF;

DBMS_OUTPUT.PUT_LINE(last_name || ',' || first_name || ' ' || title);

EXCEPTION
WHEN first_null THEN
DBMS_OUTPUT.PUT_LINE('You must enter a first name.');

WHEN last_null THEN
DBMS_OUTPUT.PUT_LINE('You must enter a last name.');

WHEN title_null THEN
DBMS_OUTPUT.PUT_LINE('You must enter a title.');

END;
/     

然后，在执行过程时，使用prompt，因为prompt在外部而不是在存储过程中工作

像

SET SERVEROUTPUT ON


CREATE PROCEDURE print_name (first_name IN varchar, last_name varchar, 
title varchar) IS

ACCEPT p_first_name PROMPT 'Please enter a first name:'

ACCEPT p_last_name PROMPT 'Please enter a second name:'

ACCEPT p_title PROMPT 'Please enter a second name:'

DECLARE

first_name varchar  :=&p_first_name;
last_name varchar   :=&p_last_name;
title varchar       :=&p_title;


first_null EXCEPTION;
last_null EXCEPTION;
title_null EXCEPTION;

BEGIN



IF first_name IS NULL THEN
raise first_null;
END IF;

IF last_name IS NULL THEN
raise last_null;
END IF;

IF title IS NULL THEN
raise title_null;
END IF;

DBMS_OUTPUT.PUT_LINE(last_name || ',' || first_name || ' ' || title);

EXCEPTION
WHEN first_null THEN
DBMS_OUTPUT.PUT_LINE('You must enter a first name.');

WHEN last_null THEN
DBMS_OUTPUT.PUT_LINE('You must enter a last name.');

WHEN title_null THEN
DBMS_OUTPUT.PUT_LINE('You must enter a title.');

END;
/

Doe, Jane Ms.

Error(6,21): PLS-00103: Encountered the symbol "PROMPT" when expecting 
one of the following:     := . ( @ % ; not null range default character

    CREATE OR REPLACE PROCEDURE print_name (first_name IN varchar, last_name 
            varchar, title varchar) IS






first_null EXCEPTION;
last_null EXCEPTION;
title_null EXCEPTION;

BEGIN




IF first_name IS NULL THEN
raise first_null;
END IF;

IF last_name IS NULL THEN
raise last_null;
END IF;

IF title IS NULL THEN
raise title_null;
END IF;

DBMS_OUTPUT.PUT_LINE(last_name || ',' || first_name || ' ' || title);

EXCEPTION
WHEN first_null THEN
DBMS_OUTPUT.PUT_LINE('You must enter a first name.');

WHEN last_null THEN
DBMS_OUTPUT.PUT_LINE('You must enter a last name.');

WHEN title_null THEN
DBMS_OUTPUT.PUT_LINE('You must enter a title.');

END;
/     

 ACCEPT p_first_name  char PROMPT 'Please enter a first name:';
 ACCEPT p_last_name char PROMPT 'Please enter a second name:';

       ACCEPT p_title_name char  PROMPT 'Please enter a second name:';


 exec print_name('&p_first_name','&p_last_name','&p_title_name');