pl/sql编程 （八）

• 不带参数的存储过程

　　定义

create procedure pro_goods
as
begin
       update goods set remark = 'sss' where goodsid = 1;
end;

　　执行

begin
 pro_goods;
end;

 　使用游标的存储过程

select * from goods where goodsid = 1

create or replace procedure pro_goods_cursor
as
       v_goodsinfo goods%rowtype;
       cursor cursor_goods
       is
       select * from goods where goodsid <10;
       begin
       open  cursor_goods;
             loop
                fetch  cursor_goods into v_goodsinfo;
                exit when cursor_goods%notfound;
                if(v_goodsinfo.goodsid > 5)then
                     update goods set remark = 'ccc' where goodsid = v_goodsinfo.goodsid;
                end if;
             end loop;
       close cursor_goods;
       end;

　　使用中间变量

create or replace procedure  pro_createtable
as
    tableexist varchar2(2);
    my_createtable varchar2(400);
   begin
        select count(1) into tableexist from all_tables where table_name = 'test_table';
        my_createtable :='create global temporary table test_table (test varchar2(20) not null) on commit preserve rows';
        dbms_output.put_line(tableexist);
        if tableexist = 0 then
           execute immediate my_createtable ;
           dbms_output.put_line('临时表创建成功……');
        else
           execute immediate 'delete from test_table';
            dbms_output.put_line('清空临时表……');
        end if;
   end;