衆所周知,視圖(view)中是不能直接使用變量的,但是在視圖裏面是可以調用包(package)的,通過package爲視圖傳參。
1 創建全局變量(簡單的get/set方法)
Package:
create or replace package p_countyarea_param is
--爲視圖創建變量
function set_param(datetime varchar2) return varchar2;
function get_param return varchar2;
end p_countyarea_param;
Package Body:
create or replace package body p_countyarea_param is
--記住日期時間的
paramValue varchar2(10);
function set_param(datetime varchar2) return varchar2 is
begin
paramValue := datetime;
return datetime;
end;
function get_param return varchar2 is
begin
return paramValue;
end;
end p_countyarea_param;
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2 在視圖中調用變量
create or replace view p_view_user as
select id,
realName,
address
from tbl_info
where id = p_countyarea_param.get_param();
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3 在查詢中調用變量
select *
from p_view_user
where p_countyarea_param.set_param(<param>)=<param>