PL/SQL 异常处理

SQL> set serveroutput on
SQL> declare
  name varchar2(10);
begin
  select ename into name from emp where empno = &no;
  dbms_output.put_line(name);
EXCEPTION
  when NO_DATA_FOUND THEN
    dbms_output.put_line('该雇员不存在');
end;  2    3    4    5    6    7    8    9 
 10  /
Enter value for no: 7369
old   4:   select ename into name from emp where empno = &no;
new   4:   select ename into name from emp where empno = 7369;
SMITH

PL/SQL procedure successfully completed.

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create or replace procedure test_proc2(no number) IS
  name varchar2(10);
begin
  select ename into name from emp where empno = no;
  dbms_output.put_line(name);
EXCEPTION
  when NO_DATA_FOUND THEN
    dbms_output.put_line('this employees is not exits');
end;
    

SQL> exec test_proc2(7369);
SMITH

PL/SQL procedure successfully completed.

SQL> exec test_proc2(10000);
this employees is not exits

PL/SQL procedure successfully completed.