如何在ORACLE的SQL PLUS里执行有输入参数输出参数的存储过程？

Question

我是这样写的，报错
set serveroutput on;
MSG VARCHAR2(100);
ND VARCHAR2(4):='2006';
YF VARCHAR2(2):='07';
exce PK_JZJK.GC_JZJK_BKSKBD(ND,YF,MSG);
DBMS_OUTPUT.PUT_LINE(MSG);

Answer 1

MSG是返回的值么?
set serveroutput on;
declare
MSG VARCHAR2(100);
begin
exce PK_JZJK.GC_JZJK_BKSKBD('2006','07',MSG);
end

Answer 2

var MSG VARCHAR2(100);
exce PK_JZJK.GC_JZJK_BKSKBD(2006,07,:MSG);
print msg;

Answer 3

sqlplus中用print
pl/sql中有DBMS_OUTPUT.PUT_LINE

Answer 4

sqlplus中用print
pl/sql中有DBMS_OUTPUT.PUT_LINE