pl/sql進階

來源:互聯網
上載者:User

Oracle的控制語句

1.條件陳述式:

  pl/sql 中提供了三種條件分支語句:

  if ... then ...

  if ... then ... else...

  if ...then ... elsif ... then ... else ...

a.簡單的條件判斷: if ... then ...

?編寫一個過程,可以輸入一個員工姓名,如果該員工的工資低於2000,就給該員工增加10%

  create or replace procedure pro_sal (myName varchar2) is

   v_sal emp.sal%type;

   begin

    select sal into v_sal from emp where ename = myName;

    if v_sal > 2000 then

      update emp ser sal = sal * 1.1 where ename  = myname;

   end;

 b.雙重條件分支:if ... then ... else ...

 c. 多重條件分支:if ... then ... elsif ... then ... else ...

2.迴圈語句:

  loop ... end loop;

  while ... loop ... end loop;
  for i in [reverse] 1... 10 loop ... end;

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