Thursday, August 6, 2015

Update incremental value in one colum with one update statement in SQL

Declare @CorporateId int = 12, @SortOrder int
Set @SortOrder = 0
Update DashboardIndicators SET @SortOrder = SortOrder = @SortOrder + 1 Where CorporateId = @CorporateId

Tuesday, July 28, 2015

Update all of the null values to default values in SQL table

 SELECT  'update '+ so.name+' set '+sc.name+'= '''' where '+sc.name+' is null '  
   
            FROM sysobjects so
            JOIN syscolumns sc ON so.id = sc.id
            JOIN systypes st ON sc.xtype=st.xtype 
            where so.type = 'U'
            and st.name in('nvarchar','int')
            and so.name = 'TableName'

Saturday, June 6, 2015

Case in where clause in SQL Server


Old Approach (will be messy in case of multiple columns in where clause)

If @Id = 0
    Select * From tbl
Else
    Select * From tbl Where Id = @Id




Good Approches:

-- Do the comparison, OR'd with a check on the @Country=0 case
Select * From tbl WHERE (Id = @Id OR @Id = 0)

-- compare the Country field to itself
Select * From tbl WHERE Id = CASE WHEN @Id > 0 THEN @Id ELSE Id END


Friday, May 15, 2015

Get the scripted Stored Procedures As Result of DB SQL Query in SQL Server.

select Definition
from
(
SELECT SM.Object_ID o, 1 ord, SM.Definition
FROM SYS.SQL_Modules As SM INNER JOIN SYS.Objects As Obj
ON SM.Object_ID = Obj.Object_ID WHERE Obj.Type = 'P'
union all
SELECT SM.Object_ID o, 2 ord, 'GO'
FROM SYS.SQL_Modules As SM INNER JOIN SYS.Objects As Obj
ON SM.Object_ID = Obj.Object_ID WHERE Obj.Type = 'P'
) a
order by o,ord

Back Button Issue after LogOff in .Net mvc

If User donot want to remove the cache at each web page  in the entire application and don't want to go back after logoff the system, then the following code will be good enough:

public ActionResult LogOff()
    {

        FormsAuthentication.SignOut();
        Session.Abandon();
        Session.Clear();

        // clear authentication cookie
        HttpCookie cookie1 = new HttpCookie(FormsAuthentication.FormsCookieName, "");
        cookie1.Expires = DateTime.Now.AddYears(-1);
        Response.Cookies.Add(cookie1);

        // clear session cookie (not necessary for your current problem but i would recommend you do it anyway)
        HttpCookie cookie2 = new HttpCookie("ASP.NET_SessionId", "");
        cookie2.Expires = DateTime.Now.AddYears(-1);
        Response.Cookies.Add(cookie2);

        // Invalidate the Cache on the Client Side
        Response.Cache.SetCacheability(HttpCacheability.NoCache);
        Response.Cache.SetExpires(DateTime.UtcNow.AddMinutes(-1));
        Response.Cache.SetNoStore();

        Response.AppendHeader("Pragma", "no-cache");

        // send an expired cookie back to the browser
        var ticketExpiration = DateTime.Now.AddDays(-7);
        var ticket = new FormsAuthenticationTicket(
            1,
            // replace with username if this is the wrong cookie name
            FormsAuthentication.FormsCookieName,
            DateTime.Now,
            ticketExpiration,
            false,
            String.Empty);
        var cookie = new System.Web.HttpCookie("user")
        {
            Expires = ticketExpiration,
            Value = FormsAuthentication.Encrypt(ticket),
            HttpOnly = true
        };

        Response.Cookies.Add(cookie);

        return RedirectToAction("Login", "Account");
    }


If User wants to remove caching the entire application, then the following code will be applied in the Global.asax.cs file:
protected void Application_BeginRequest()
{
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    Response.Cache.SetExpires(DateTime.UtcNow.AddHours(-1));
    Response.Cache.SetNoStore();
}

Wednesday, April 1, 2015

Tuesday, March 31, 2015