SQL-General | Varinder Sandhu

SQL Server – Single Instance vs. Multiple Instances

Varinder Sandhu — Fri, 24 Jul 2015 12:14:00 +0000

Single Instance Pros Only one instance needs to be administered on the single machine. There is no duplication of components or processing overhead, such as having to run multiple database engines on the same computer. This means that the overall performance of a server with a single instance may be

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SQL Server – Understanding of SQL Server Role and Database Role

Varinder Sandhu — Fri, 21 Mar 2014 11:27:11 +0000

SQL Server supports the two authentication mode as Windows authentication mode and Mixed authentication mode. Once the user is authenticated, SQL server will allow access to the user based on the permission that user has. All the user permissions are based on Server Role and Database Role. So let try

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SQL Server – How Like operator work with datetime

Varinder Sandhu — Tue, 12 Feb 2013 17:25:11 +0000

Today, my one of the friend shared a very interesting fact about like operator. With the help of this post I am sharing with you all. We need to convert it to character data while comparing with the like operator. Let‘s check with example Like operator with datetime Like Operator

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SQL Server – How to add column dynamically in where clause

Varinder Sandhu — Tue, 04 Dec 2012 14:44:11 +0000

In this post, we will learn with example how to add the column dynamically in where clause. Example: For demo we have table as shown in the snapshot Basically we want to execute following script (i.e. Script: 1) but column name (i.e. FIRST_NAME) added dynamically in where clause. Script: 1

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SQL Server – The multi-part identifier could not be bound State – Msg 4104 – Fix

Varinder Sandhu — Fri, 23 Nov 2012 10:28:43 +0000

Error Msg Server: Msg 4104, Level 16, State 1, Line 1 The multi-part identifier could not be bound. Cause of this Error Msg: Case: 1 This error usually occurs when an alias is used when referencing a column in a SELECT statement and the alias used is not defined anywhere

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Best Way to Configure Firewall for SQL Server Access

Varinder Sandhu — Thu, 08 Nov 2012 08:53:18 +0000

Windows firewall is nothing but the software and hardware based network security. It generally controls the transaction traffic mixed up with data packets. Simultaneously it determines whether the upcoming signal is eligible for further routing or not. The threats coming from outside can be prevented with this protective shield. On

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SQL Server – Export the Data from SQL Server to Oracle Database – Import-Export Wizard

Varinder Sandhu — Sat, 01 Sep 2012 13:21:23 +0000

The SQL Server Import and Export Wizard provides the simplest method of copying data between data sources. In this article given an example to copy the data from SQL Server to Oracle database. Click here to download the full PDF version of this article. After this article,for more detail about

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SQL Server – Generate Row Number in Select and Select into

Varinder Sandhu — Thu, 30 Aug 2012 11:24:40 +0000

How to Generate the Row Number in Select and Select into script? Using IDENTITY for Select Into SELECT RowNumber=IDENTITY(int,1,1),FIRST_NAME,LAST_NAME into EMPLOYEE_backup FROM EMPLOYEE Using Row_Number() for Select SELECT ROW_NUMBER() OVER (ORDER BY ID ASC) RowNumber, FIRST_NAME,LAST_NAME FROM EMPLOYEE Using Row_Number() for Select into SELECT ROW_NUMBER() OVER (ORDER BY ID ASC)

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SQL Server 2008 – How to copy a Table

Varinder Sandhu — Mon, 09 Jul 2012 10:08:13 +0000

Lets see how to copy an existing table to new table in SQL Server. There are two options. Copy the table with Data. Copy the table without data (i.e.Table Structure Only) -- Create Table CREATE TABLE EMPLOYEE ( ID INT NOT NULL, FIRST_NAME VARCHAR(10), LAST_NAME VARCHAR(10) ); -- INSERT

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SQL Server – NEWID () vs. NEWSEQUENTIALID ()

Varinder Sandhu — Mon, 18 Jun 2012 16:57:05 +0000

NEWID () NEWID () creates a unique value of type uniqueidentifier. NEWID () can be referenced in the queries. Example: NEWSEQUENTIALID () NEWSEQUENTIALID () creates a GUID that is greater than any GUID previously generated by this function on a specified computer since Windows was started. After restarting Windows, the

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