如果今天等於或少於從表中獲取expiredate SQL Server CE

Question

一些幫助，將不勝感激。

我有一個表tblItem的列ExpireDate（DateTime），AlertDays（Int）。我想在expiredate之前x天提醒您。

我想統計today + alertdays <= ExpireDate的所有項目。

我有以下的代碼，但它造成的錯誤：

There was an error parsing the query. [ Token line number = 1,Token line offset = 48,Token in error = select ]

請看看我的代碼：

internal static int getAlertDateExpire() 
{ 
    SqlCeConnection con = ConectionAndData.Con; 

    if (con.State == System.Data.ConnectionState.Closed) 
     con.Open(); 

    int number = 0; 

    string sqlCommand = "select count(*) from tblItem where (Getdate()+(select AlertDays from tblItem)) As today <= ExpireDate Order By ItemName ASC"; 

    SqlCeCommand com = new SqlCeCommand(sqlCommand, con); 

    try 
    { 
     number = (Int32)com.ExecuteScalar(); 
    } 
    catch (Exception ex) 
    { 
     throw ex; 
    } 
    finally 
    { 
     con.Close(); 
    } 

    return number; 
} 

Answer 1

我得到了幫助並希望分享答案。

(select count(*) from tblItem where dateadd(day,AlertDays,getdate()) >= ExpireDate) 

Answer 2

你不能只添加使用+使用DATEADD功能日子：

select count(*) from tblItem where 
DATEADD(day, (select AlertDays from tblItem) ,Getdate()) 
<= ExpireDate