PL/SQL 存储过程学习2 条件语句

if...条件...then

end if;

------------------

if...条件...then

语句1

else

语句2

end if;

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if...条件1...then

语句1

elsif...条件2...then

语句2

elsif...条件3...then

语句3

...........

end if;

--练习条件判断语句 
--更新账户余额
--编写一个过程，输入一个账户名，如果该账户的余额低于100，就增加10%
create or replace procedure sp_money_test(sp_name in varchar2) as
--%TYPE
--引用某个变量或数据库列的数据库类型来声明变量。 
v_money userinfo.leavmoney%type;
begin
  select leavmoney into v_money from userinfo where loginname=sp_name;
  if v_money<100 then
    update userinfo set leavmoney=leavmoney*1.1 where loginname=sp_name;
  end if;
end;

--对上面的过程进行条件判断扩展
create or replace procedure sp_money_test2(sp_name in varchar2) as
v_money userinfo.leavmoney%type;
begin
  select leavmoney into v_money from userinfo where loginname=sp_name;
  if v_money<10 then --like 7,8
    update userinfo set leavmoney=leavmoney+1 where loginname=sp_name;
  elsif v_money<20 then --like 12,19
    update userinfo set leavmoney=leavmoney+2 where loginname=sp_name;  
  elsif v_money<50 then --like 22,32,45
    update userinfo set leavmoney=leavmoney+5 where loginname=sp_name;      
  else  --like 大于50
    update userinfo set leavmoney=leavmoney+10 where loginname=sp_name;      
  end if;
end;