--變量賦值正確,單個數據默認爲變量
declare @s1 varchar(20)
set @s1 =(select MAX(parked_id) from parked)
--變量賦值錯誤,多個數據默認爲數據集
declare @s2 varchar(20)
set @s2 =(select parked_id from parked)
--變量賦值正確,單個數據默認爲變量
declare @s1 varchar(20)
set @s1 =(select MAX(parked_id) from parked)
--變量賦值錯誤,多個數據默認爲數據集
declare @s2 varchar(20)
set @s2 =(select parked_id from parked)
From1 準備傳值代碼: Password pa = new Password(); pa.MdiParent = this;//聲明 PassWord的父窗體是本窗體( Form1)