First I considered creating some indexes on the view, but there a lot of limitations on indexed views. No unions, no sub-queries, no reference to other views and no OUTER JOINS! A legitimately needed left join was present in the view and any attempt to create a index raised a “not allowed construct” error. After hours of trial and error I managed to do it work. It’s not at all an elegant approach, but it works for outer joins. Unions, sub-queries and temporary tables can be emulated by these outer joins, and these can emulate them too.

The Solution

The idea is quite simple. Just emulate a outer join with a inner join! Swamp the outer join with a inner join and put a isnull(table_id,0) at one side of the comparison. The code below shows a full example:

CREATE TABLE Father
(
Father_id  smallint IDENTITY(1,1) PRIMARY KEY CLUSTERED,
Father_Name varchar(50)
)
GO
CREATE TABLE Son
(
Father_id  smallint, /*Foreign key*/
Paternity varchar(50)
)
GO
INSERT INTO Father values(’Father 1′)
INSERT INTO Father values(’Father 2′)
INSERT INTO Father values(’Father 3′)
INSERT INTO Son values(1,’Child 1A of father 1′)
INSERT INTO Son values(1,’Child 1B of father 1′)
INSERT INTO Son values(2,’Child 2A of father 2′)
INSERT INTO Son values(null,’Child 0X of no father’)
GO
/* Test your tables */
SELECT f.father_id, f.father_name, s.father_id, s.paternity
from father f
INNER JOIN son s
on s.father_id=f.father_id
GO
/* Test your tables twice*/
SELECT f.father_id, f.father_name, s.father_id, s.paternity
from father f
LEFT JOIN son s
on s.father_id=f.father_id
/* Test your tables twice*/
SELECT f.father_id, f.father_name, s.father_id, s.paternity
from father f
RIGHT JOIN son s
on s.father_id=f.father_id
GO
/* Yep, do u need to put the owners names to bind the view to the schema */
CREATE VIEW [dbo].[Family] WITH SCHEMABINDING
AS
/* Yes! You are right this is equal to the select example ; */
SELECT f.father_id, f.father_name, s.father_id as son_id, s.paternity
from [dbo].[father] f
INNER JOIN [dbo].[son] s
on isnull(s.father_id, -255)=f.father_id
GO
SELECT * FROM Family
GO
/* Hey!!! It not worked! We are forgetting one important thing to do   */
/* we need a row at the father table to be the “null” or no father row */
SET IDENTITY_INSERT Father ON
INSERT INTO Father (Father_id, Father_name) values(-255,’No father’)
SET IDENTITY_INSERT Father OFF
GO
/* Now create your indexes!!! */
CREATE  UNIQUE  CLUSTERED  INDEX [Pk_Paternity]
ON [dbo].[Family]([paternity])
ON [PRIMARY]
GO
CREATE  INDEX [Pk_father_name]
ON [dbo].[Family]([father_name])
ON [PRIMARY]
GO
INSERT INTO Son values(2,’Child 2B of father 2′)
INSERT INTO Son values(2,’Child 2C of father 2′)
INSERT INTO Son values(null,’Child 0Y of no father’)
INSERT INTO Son values(null,’Child 0Z of no father’)
GO
SELECT * FROM Family
GO

Conclusions

Before your start to put indexes at all views, try use all your other tricks to enhance performance first. Use tables indices, normalization, disk IO, etc. Indexed views are one more tool at hand and this article is just one more tip to help you use them.

ALTER TABLE Table1
DROP PRIMARY KEY
GO

Msg 156, Level 15, State 1, Line 3
Incorrect syntax near the keyword ‘PRIMARY’.

As mentioned earlier, this syntax is for MySql, not SQL Server. If you want to drop primary key constraint in SQL Server, run the following query.

ALTER TABLE Table1
DROP CONSTRAINT PK_Table1_Col1
GO

Let us now pursue the complete example. First, we will create a table that has primary key. Next, we will drop the primary key successfully using the correct syntax of SQL Server.

CREATE TABLE Table1(
Col1 INT NOT NULL,
Col2 VARCHAR(100)
CONSTRAINT PK_Table1_Col1 PRIMARY KEY CLUSTERED (
Col1 ASC)
)
GO

/* For SQL Server/Oracle/MS ACCESS */
ALTER TABLE Table1
DROP CONSTRAINT PK_Table1_Col1
GO

/* For MySql */
ALTER TABLE Table1
DROP PRIMARY KEY
GO

sp_helptext ‘DBObjectName’

[Or]

select object_definition(object_id(’DBObjectName’))

Create table with Primary Key:
CREATE TABLE Authors (
AuthorID INT NOT NULL PRIMARY KEY,
Name VARCHAR(100) NOT NULL
)
GO

Alter table with Primary Key:
ALTER TABLE Authors
ADD CONSTRAINT pk_authors PRIMARY KEY (AuthorID)
GO

Unique Key:
Unique Key enforces uniqueness of the column on which they are defined. Unique Key creates a non-clustered index on the column. Unique Key allows only one NULL Value.

Alter table to add unique constraint to column:
ALTER TABLE Authors ADD CONSTRAINT IX_Authors_Name UNIQUE(Name)
GO

string fileName = tempFileName != null ? tempFileName : “Untitled”;

If tempFileName is not null, fileName = tempFileName, else fileName = “Untitled“.

This can now be abbreviated as follows using the Null-Coalescing Operator:

string fileName = tempFileName ?? “Untitled”;

The logic is the same. If tempFileName is not null, fileName = tempFileName, else fileName = “Untitled“.

The Null-Coalescing Operator comes up a lot with nullable types, particular when converting from a nullable type to its value type:

int? count = null;

int amount = count ?? default(int);

Since count is null, amount will now be the default value of an integer type ( zero ).

These Conditional and Null-Coalescing Operators aren’t the most self-describing operators , but I do love programming in C#!

Reference : http://source.witssquare.com

CURRENT_TIMESTAMP
CURRENT_TIMESTAMP is a nondeterministic function. Views and expressions that reference this column cannot be indexed. CURRENT_TIMESTAMP can be used to print the current date and time every time that the report is produced.

GETDATE()
GETDATE is a nondeterministic function. Views and expressions that reference this column cannot be indexed. GETDATE can be used to print the current date and time every time that the report is produced.

{fn Now()}
The {fn Now()} is an ODBC canonical function which can be used in T-SQL since the OLE DB provider for SQL Server supports them. {fn Now()} can be used to print the current date and time every time that the report is produced.

If you run following script in Query Analyzer. I will give you same results. If you see execution plan there is no performance difference. It is same for all the three select statement.
SELECT CURRENT_TIMESTAMP
GO
SELECT {fn NOW()}
GO
SELECT GETDATE()
GO

Performance:
There is absolutely no difference in using any of them. As they are absolutely same.

My Preference:
I like GETDATE(). Why? Why bother when they are same!!!

Convert Date Format for like this [dd-MMM-yyyy].

Select Substring(Convert(Varchar(10),getdate(),111), Len(Convert(Varchar(10),getdate(),111))-1,2) + ‘-’ +
Substring(Convert(Varchar(20),getdate(),0),1,3) + ‘-’ + Substring(Convert(Varchar(10),getdate(),111),1,4)As Date

2. The data passed using the GET method would be visible to the user of the website in the browser address bar but when we pass the information using the POST method the data is not visible to the user directly.

3. Also in GET method characters were restricted only to 256 characters.But in the case of POST method characters were not restricted.
Get method will be visible to the user as it sended appended to the UML, put Post will not be visible as it is sent encapsulated within the HTTP request body.

4. About the data type that can be send, with Get method you can only use text as it sent as a string appended with the URL, but with post is can text or binary.

5. About form default, Get is the defualt method for any form, if you need to use the post method, you have to change the value of the attribute “method” to be Post.

Get method has maximum length restricted to 256 characters as it is sent appended with the URL, but the Post method hasn’t.

Reference : http://source.witssquare.com

In this just make a form as follows:

1. Name : <asp:TextBox ID=”txtName” />
2. Email : <asp:TextBox ID=”txtEmail” />
3. Web URL : <asp:TextBox ID=”txtWebUrl” />
4. Zip : <asp:TextBox ID=”txtZip” />
5. <asp:Button ID=”btnSubmit” OnClientClick=” return validate()” runat=”server” Text=”Submit” />

Now on the source code of this form in script tag write the following code:

<script language=”javascript” type=”text/javascript”>
function validate()
{
if (document.getElementById(“<%=txtName.ClientID%>”).value==“”)
{
alert(“Name Feild can not be blank”);
document.getElementById(“<%=txtName.ClientID%>”).focus();
return false;
}
if(document.getElementById(“<%=txtEmail.ClientID %>”).value==“”)
{
alert(“Email id can not be blank”);
document.getElementById(“<%=txtEmail.ClientID %>”).focus();
return false;
}
var emailPat = /^(\”.*\”|[A-Za-z]\w*)@(\[\d{1,3}(\.\d{1,3}){3}]|[A-Za-z]\w*(\.[A-Za-z]\w*)+)$/;
var emailid=document.getElementById(“<%=txtEmail.ClientID %>”).value;
var matchArray = emailid.match(emailPat);
if (matchArray == null)
{
alert(“Your email address seems incorrect. Please try again.”);
document.getElementById(“<%=txtEmail.ClientID %>”).focus();
return false;
}
if(document.getElementById(“<%=txtWebURL.ClientID %>”).value==“”)
{
alert(“Web URL can not be blank”);
document.getElementById(“<%=txtWebURL.ClientID %>”).value=“http://”
document.getElementById(“<%=txtWebURL.ClientID %>”).focus();
return false;
}
var Url=“^[A-Za-z]+://[A-Za-z0-9-_]+\\.[A-Za-z0-9-_%&\?\/.=]+$”
var tempURL=document.getElementById(“<%=txtWebURL.ClientID%>”).value;
var matchURL=tempURL.match(Url);
if(matchURL==null)
{
alert(“Web URL does not look valid”);
document.getElementById(“<%=txtWebURL.ClientID %>”).focus();
return false;
}
if (document.getElementById(“<%=txtZIP.ClientID%>”).value==“”)
{
alert(“Zip Code is not valid”);
document.getElementById(“<%=txtZIP.ClientID%>”).focus();
return false;
}
var digits=“0123456789″;
var temp;
for (var i=0;i<document.getElementById(“<%=txtZIP.ClientID %>”).value.length;i++)
{
temp=document.getElementById(“<%=txtZIP.ClientID%>”).value.substring(i,i+1);
if (digits.indexOf(temp)==-1)
{
alert(“Please enter correct zip code”);
document.getElementById(“<%=txtZIP.ClientID%>”).focus();
return false;
}
}
return true;
}
</script>

And in code behind file just write the below code.

In C#,

protected void Page_Load(object sender, System.EventArgs e)
{

btnSubmit.Attributes.Add(“onclick”, “return validate()”);

}

In VB,

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
btnSubmit.Attributes.Add(“onclick”, “return validate()”)
End Sub

Reference : http://source.witssquare.com

The global acceptance of Web services, which includes standard protocols for application-to-application communication, has changed software development. For example, the functions that Web services now provide include security, distributed transaction coordination, and reliable communication. The benefits of the changes in Web services should be reflected in the tools and technologies that developers use. Windows Communication Foundation (WCF)…

Read more…

Reference : http://source.witssquare.com/

The function uses a OleDbConnection to connect to the data source (the excel file). The file is is referred by a DataTable and each row in this DataTable is a sheet in Excel file. And thus, the row names are obtained easily.

using System.IO;
using System.Data.OleDb;

protected void Page_Load(object sender, EventArgs e)
{
    GetExcelSheetNames(@"E:\\Book1.xls");
}

public string[] GetExcelSheetNames(string excelFileName)
 {
      OleDbConnection con = null;
      DataTable dt = null;
      String conStr = "Provider=Microsoft.Jet.OLEDB.4.0;" +
      "Data Source=" + excelFileName + ";Extended Properties=Excel 8.0;";
      con= new OleDbConnection(conStr);
      con.Open();
      dt = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);

      if (dt == null)
      {
          return null;
      }

      String[] excelSheetNames = new String[dt.Rows.Count];
      int i = 0;

      foreach (DataRow row in dt.Rows)
      {
          excelSheetNames[i] = row["TABLE_NAME"].ToString();
          i++;
      }
      return excelSheetNames;
 }

Reference : http://source.witssquare.com/

SELECT Session_Id,Connect_Time,Auth_Scheme,Net_Packet_Size,Client_Net_Address FROM
sys.dm_exec_connections WHERE session_id=@@spid

Results :

Session_Id  Connect_Time            Auth_Scheme                              Net_Packet_Size Client_Net_Address
———– ———————– —————————————- ————— —————————————-
53          2009-11-09 20:19:22.727 SQL                                      4096            <local machine>

Get the all details from this query,

SELECT * FROM sys.dm_exec_connections

The Details from all columns using like,

SELECT session_id,most_recent_session_id,connect_time,net_transport,protocol_type,
protocol_version,endpoint_id,encrypt_option,auth_scheme,node_affinity,
num_reads,num_writes,last_read,last_write,net_packet_size,
client_net_address,client_tcp_port,local_net_address,local_tcp_port,
connection_id,parent_connection_id,most_recent_sql_handle
FROM sys.dm_exec_connections

Reference : http://source.witssquare.com

See also get solutinos

ORACLE:

MySQL:

Reference : http://source.witssquare.com

SELECT * FROM sys.dm_os_sys_info

Get from the Particular fields above query,

SELECT CPU_Count,HyperThread_Ratio,Physical_Memory_In_Bytes / 1048576 as ‘Memory_In_MB’,Virtual_Memory_In_Bytes / 1048576 as ‘Virtual_Memory_In_MB’,
Max_Workers_Count,OS_Error_Mode,OS_Priority_Class FROM sys.dm_os_sys_info

Results :

CPU_Count   HyperThread_Ratio Memory_In_MB         Virtual_Memory_In_MB Max_Workers_Count OS_Error_Mode OS_Priority_Class
———– —————– ——————– ——————– —————– ————- —————–
2           2                 1013                 2047                 256               5             32

Reference : http://source.witssquare.com

–Get Current Server Username
SELECT SYSTEM_USER AS ServerUserName

Results :

ServerUserName
——————————————————————————————————————————–
sa

How to Change SQL Server Password,

–Change the Current Server Password
sp_password ‘CurrentPassword’,‘NewPassword’

–Check service pack level.
SELECT ServerProperty(‘ProductLevel’) As Property

Reference : http://source.witssquare.com

–Get Current Server Name
SELECT @@ServerName AS CurrentServerName

Reference : http://source.witssquare.com

–Get Current Database Name
SELECT DB_NAME() AS DataBaseName

Reference : http://source.witssquare.com

DataTable dt1 = new DataTable();

DataTable dt2 = new DataTable();

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
dt1.Columns.Add(“ID”, Type.GetType(“System.Int32″));
dt1.Columns.Add(“Name”, Type.GetType(“System.String”));
dt1.Rows.Add(new object[] { 1, “Tommy1″ });
dt1.Rows.Add(new object[] { 2, “Tommy2″ });
dt1.Rows.Add(new object[] { 3, “Tommy3″ });
ds.Tables.Add(dt1);

dt2.Columns.Add(“ID”, Type.GetType(“System.Int32″));
dt2.Columns.Add(“Name”, Type.GetType(“System.String”));
dt2.Rows.Add(new object[] { 4, “asdf4″ });
dt2.Rows.Add(new object[] { 5, “asdf5″ });
dt2.Rows.Add(new object[] { 6, “asdf6″ });
ds.Tables.Add(dt2);

dt1.Merge(dt2, true, MissingSchemaAction.Ignore);

GridView1.DataSource = dt1;
GridView1.DataBind();

//Use other way of work use Below Union DataTable Function
//GridView1.DataSource = Union(dt1, dt2);
//GridView1.DataBind();
}
}

//Union DataTable Function

public static DataTable Union(DataTable First, DataTable Second)
{
//Result table
DataTable table = new DataTable(“Union”);
//Build new columns
DataColumn[] newcolumns = new DataColumn[First.Columns.Count];
for (int i = 0; i < First.Columns.Count; i++)
{
newcolumns[i] = new DataColumn(First.Columns[i].ColumnName, First.Columns[i].DataType);
}
table.Columns.AddRange(newcolumns);
table.BeginLoadData();
foreach (DataRow row in First.Rows)
{
table.LoadDataRow(row.ItemArray, true);
}
foreach (DataRow row in Second.Rows)
{
table.LoadDataRow(row.ItemArray, true);
}
table.EndLoadData();

return table;

}

create table tblMedian(val int)
Insert into tblMedian (val) Values (10)
Insert into tblMedian (val) Values (30)
Insert into tblMedian (val) Values (60)
Insert into tblMedian (val) Values (100)
Insert into tblMedian (val) Values (110)
Insert into tblMedian (val) Values (150)
Insert into tblMedian (val) Values (170)
Insert into tblMedian (val) Values (1000)

select * from tblMedian ORDER BY val ASC

Via I :
DECLARE @M1 int, @M2 int
SELECT TOP 50 PERCENT @M1 = val FROM tblMedian ORDER BY val ASC
SELECT TOP 50 PERCENT @M2 = val FROM tblMedian ORDER BY val DESC
SELECT (@M1+@M2)/2.0

Results :
MedianValue
—————————————
105.000000

Via II :
SELECT (
(SELECT TOP 1 val FROM
(SELECT TOP 50 PERCENT val FROM tblMedian WHERE val IS NOT NULL ORDER BY val) AS A ORDER BY val DESC)
+
(SELECT TOP 1 val FROM
(SELECT TOP 50 PERCENT val FROM tblMedian WHERE val IS NOT NULL ORDER BY val DESC) AS A ORDER BY val ASC)
) / 2 as MedianValue

Results:
MedianValue
—————-
105

Two tips I extracted from this thread is,

• First you don’t already have it (Debug – Exceptions) obtain the debug exceptions window (right click tool bar – customize – debug and drag exceptions into the debug menu).
• Select from Debug – Exceptions – Managed Debugging Assistants and disable ContextSwitchDeadlock.

I had no luck with trying to disable this via reg keys and config files but that is suggested in the MDA help files.

Also Reffer

• Security for .NET executable code — Administration and execution of .NET code is managed through a combination of SQL Server permissions, Windows permissions, and .NET code security. What the code can or cannot do inside and outside SQL Server is defined with three distinct levels.
• Password policies for SQL server users — If you run SQL Server 2005 on a Windows 2003 Server, SQL users can go by the same policies as integrated security users.
• Mapping SQL Server users to Windows credentials — SQL Server users can use Windows credentials when accessing external resources like files and network shares.
• Separation of users and schemas — SQL Server 2005 schemas are first-class objects that can be owned by a user, role, group, or application roles. The capability to define synonyms makes this easier to administer.
• Granting permissions — No longer do users or logins have to be in special roles to have certain permissions; they are all grantable with the GRANT, DENY, and REVOKE verbs.
• New security on SQL Server metadata — New metadata views are not directly updatable, and users can only list metadata about objects to which they have permission. There is also a new grantable VIEW DEFINITION permission.
• Execution context for procedural code — You can set the execution context for stored procedures and user-defined functions. You can also use the EXECUTE AS syntax to change the current user.
• Support of certificates and encryption keys — SQL Server 2005 can manage certificates and encryption keys for use with Service Broker, with Web Services SSL, for code authentication, and for new data encryption functions.

Some of the new security features are outside the scope of this book, and some were still in development at the time of this writing. But we’ll look at most of them in detail in this chapter. Running non-T-SQL code in a secure and reliable fashion inside SQL Server is a new concept, and we will spend a lot of this chapter examining how SQL Server’s new security features combine with the latest .NET runtime to make this possible. We include a review of how security currently works in SQL Server in general to establish a baseline of knowledge.

We will start by looking at a change in the general policy of how SQL Server is configured. Though having optional features turned off by default is technically not a feature as such, most will consider it an important step forward in securing SQL Server.