如何將值傳遞到SQL Server中的視圖

我已經創建了一個稱爲業務的視圖，它運行成功，但問題是我將如何使用動態值來代替12.925432,77.5940171，我想從SQL查詢中傳遞參數後面的c＃代碼。如何將值傳遞到SQL Server中的視圖

create view [dbo].[business] as 
SELECT Id, 
     Name1, 
     ZipCode, 
     StreetName, 
     StreetNumber, 
     State1, 
     Lat, 
     Lng, 
     Keyword, 
     (6371 * ACOS(COS((12.925432/57.2958)) * COS( (Lat/57.2958) ) * COS((Lng/57.2958) - (77.5940171/57.2958)) + SIN(12.925432/57.2958) * SIN( Lat/57.2958 ))) AS distance 
    FROM Business_Details ;

這將是我從後面的c＃代碼查詢。 ....

DataSet ds = new DataSet(); 

SqlCommand com = new SqlCommand(); 
SqlDataAdapter sqlda = new SqlDataAdapter(com); 
//sqlda.SelectCommand.CommandText = "SELECT Id,Name1,ZipCode,StreetName,StreetNumber,State1,Lat,Lng,Keyword, (6371 * ACOS(COS((12.925432/57.2958)) * COS( (Lat/57.2958) ) * COS((Lng/57.2958) - (77.5940171/57.2958)) + SIN(12.925432/57.2958) * SIN( Lat/57.2958 ))) AS distance FROM Business_Details where((StreetName like '%jayanagar%')and (Keyword like '%plumbing%'))ORDER BY distance;"; 

sqlda.SelectCommand.CommandText = "select * 
            from business 
            where ((distance < '" + radius + "') 
             and (StreetName like '%" + streetname + "%') 
             and (Keyword like '%" + keyword1 + "%')) 
           order by distance"; 
sqlda.SelectCommand.Connection = con; 
sqlda.Fill(ds); 
con.Close(); 
.....

來源

2010-09-01 mahesh

我想你會需要一個用戶定義的函數，所以：

CREATE FUNCTION spherical_distance(@a float, @b float, @c float) 
RETURNS float 
AS 
BEGIN 
    RETURN (6371 * ACOS(COS((@a/@b)) * COS( (Lat/@b) ) * COS((Lng/@b) - (@c/@b)) + SIN(@a/@b) * SIN( Lat/@b )))  
END 

create view [dbo].[business] as 
SELECT Id, 
     Name1, 
     ZipCode, 
     StreetName, 
     StreetNumber, 
     State1, 
     Lat, 
     Lng, 
     Keyword 
    FROM Business_Details

然後在代碼，你需要做到這一點：

sqlda.SelectCommand.CommandText = "select *, spherical_distance(12.925432, 57.2958, 77.5940171) as distance 
            from business 
            where ((distance < '" + radius + "') 
             and (StreetName like '%" + streetname + "%') 
             and (Keyword like '%" + keyword1 + "%')) 
           order by spherical_distance(12.925432,57.2958,77.5940171)";

然後，您會將值替換爲selectcommand的commandtext而不是這些數字。

來源

2010-09-01 04:14:55 BlackICE

+1：你打我到id。非物化視圖主要用於只讀操作。有可更新的非物化視圖，但這只是將更新掩蓋到支持表中......這與OP需要的實際功能沒有任何關係 – 2010-09-01 04:16:47

感謝您的回覆，創建用戶定義的函數不起作用 CREATE FUNCTION spherical_distance（@a float，@b float，@c float） RETURNS float AS BEGIN RETURN（6371 * ACOS（COS（（@ a/@ b））* COS（（Lat/b））* SIN（@ a/@ b）* SIN（Lat/@ b））） END 它顯示指示無效列名Lat的錯誤， Lng – mahesh 2010-09-01 04:34:59

我已經開始了你的等式，所以如果Lat，Lng在那裏是錯誤的，他們在我的udf例子中是錯誤的。修復你所需要的東西。 – BlackICE 2010-09-01 13:03:28

如何將值傳遞到SQL Server中的視圖

回答

相關問題