Querying Microsoft SQL Server : Defining Variables

Querying Microsoft SQL Server : Defining Variables: Defining Variables in SQL Server: Like other programming languages T-SQL allows to defining your...

Find Transaction Log information

Transaction Log in SQL server records all operation on database.This recoring depends on Recovery Model selected for database.You can find...

Search all running SQL Server instances over LAN

Sometimes you need to know how many and what instances of
SQL Server running in your organization over Network. You can...

Generate Random Passwords using T-SQL

Use following script to generate random Passwords
DECLARE @id int,@list varcharSET @list ='abcdefghijkmnopqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ23456789.,-_!$@#%^&*'selectreplace(SUBSTRING(CONVERT(varchar(255),NEWID()),8, 8),'-','')as RANDOM

Example:
Suppose you have a table tblUser with columns[id],[userid],[password].
CREATETABLE [dbo].[tblUser](     ...

Handling Null Values in SQL Server

What is NULL?

In SQL, A Null is an unknown or undefined value. Some interesting
operations on NULL.
--query                 --resultselect 3*NULL      --NULLselect 3+NULL     ...

Frequently asked SQL Server Queries

Data to test:
CREATETABLE [dbo].[emp](      [emp_id]
[nchar](10)NULL,      [emp_name]
[nchar](10)NULL,      [salary]
[int] NULL)ON [PRIMARY] insert emp( emp_id,emp_name,salary )  select'1','ABC',-20000 insert emp( emp_id,emp_name,salary )  select'2','XYZ',-5000 insert emp( emp_id,emp_name,salary )  select'3','PQR',-7800 insert emp( emp_id,emp_name,salary...

DBCC Commands for SQL Server

DBCC Commands:
DBCC commands are most useful for
performance and troubleshooting.

The DBCC Commands are used in Maintenance, Informational use, Validation on a
database,...

SQL Server

What is SQL Server?Microsoft SQL Server is Relational database management system (RDBMS) developed and owned by Microsoft. It is a software...

Frequently asked Scripts during Interviews

1.Select no of Months between two dates:

SELECT    DATEDIFF(MONTH,'4/1/2011','01/23/2013')+    CASE        WHENDAY('4/1/2011')<DAY('01/23/2013')        THEN 1         ELSE 0     END
Output:
----------------
22

2.What will be the
output of following...

FOR XML Clause

FOR XML CLAUSE: Sometimes we need to data in form of XML from
Database.SQL Server provide FOR XML Clause. For XML clause...