Click here to monitor SSC
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 

Vivek's SQL Notes

Vivek johari is currently a Analyst and have more that 5.5 yeras of experience in database. He has Master degree in Computer and also he is Microsoft certified Sql DBA (MCTS)& Microsoft certified SQl BI professional(MCTS). He is also Oracle certified profession(OCP)DBA in ORACLE 10g and ORACLE 9i.He has the experience of working in PL/SQL, T-SQL and SSIS/SSRS. His work basically involved designing and optimization of the Database.He has also published many database articles on his blog Technologies with Vivek Johari.

How to Resume Suspended Database Mirroring in SQL Server ?

Overview

Database mirroring is a feature in SQL Server which is creating and maintaining the redundant copies of the database. The purpose behind database mirroring is continuous data availability and minimizes the loss of the data. Redundancy ensures that there is always a one backup copy of the database should… Read more

3 comments, 727 reads

Posted in Vivek's SQL Notes on 3 September 2016

Happy New Year Friends

Wishing all of you a very Happy New Year. May GOD bless all of you with lots of Success and Happiness.


Read more

0 comments, 201 reads

Posted in Vivek's SQL Notes on 1 January 2016

SQL Recovery Software: An Ultimate Tool For SQL Database Recovery

SQL Server is a database management system which enables to store and retrieve data from the database. Due to some reasons like virus infection, improper closing of the Server, etc. the data in the database may go damaged or corrupted. The recovery of the data can be made possible with…

Read more

0 comments, 389 reads

Posted in Vivek's SQL Notes on 31 December 2015

Happy Independence Day - Jai Hind

Wishing you a very

Happy Independence Day


" We owe a lot to the Indians, who taught us how to count, without which no worthwhile scientific discovery could have been made. "Albert Einstein.



     Some facts about India 
  1. Indus Valley Civilization is the world’s oldest civilization.So, India is…

Read more

0 comments, 339 reads

Posted in Vivek's SQL Notes on 15 August 2015

SQL Script to find all the triggers defined on a database or on a single table

Sometime we need to find all the triggers defined on the database. So in this case, we can use the below SQL Query:-

SELECT
       tbl.name as [Table Name]
     , trig.name as [Trigger Name]
     , trig.is_disabled 
FROM [sys].[triggers] as trig
INNER JOIN sys.tables as…

Read more

0 comments, 461 reads

Posted in Vivek's SQL Notes on 14 August 2015

Interview question - Is Clustered index on column with duplicate values possible?

Through this article, we are going to discuss three important interview questions of SQL which are given below:-


 1) Can we create clustered index on a column containing duplicate values?

 2) Can we create a Primary Key on a table on which a clustered index is already defined?

3) If a clustered index…

Read more

0 comments, 726 reads

Posted in Vivek's SQL Notes on 13 August 2015

Question of the Month (July)

Suppose we have a table emp_plan  which contains 4 columns "Empid" (employeeid), Planid (Projectid), Startdate(Allocation Start date) and Enddate (Allocation Enddate). Its structure is given below:-


Create table emp_plan (empid nvarchar(200),planid nvarchar(20),startdate datetime, enddate datetime)

Also below is the script to enter sample data into the table:-

insert into emp_plan(empid,planid,startdate,enddate)
select…

Read more

4 comments, 287 reads

Posted in Vivek's SQL Notes on 3 August 2015

Do you know about Whatsapp web?


Whatsapp claims that they currently have 500 million users worldwide. That is pretty impressive looking at the good amount of distinctively decent competitors they have within the space of Social Networking communication. ViberLineGoogle Hangout,Facebook Messenger & Hike (Commonly in India). While all these products…

Read more

0 comments, 498 reads

Posted in Vivek's SQL Notes on 11 July 2015

Script to find complete months between two given dates

Below script will help in finding the complete months within the 2 given dates. In the below script we takes below dates as example

Startdate =2015-07-05
Enddate =2016-01-06

/**********************Script Start**************************/

IF (object_id('tempdb..#month') is not null)
DROP TABLE #month

CREATE TABLE #month (id int identity(1,1),MonthStartDate DATETIME,MonthEndDate DATETIME)

DECLARE @startdate AS DATETIME

Read more

0 comments, 459 reads

Posted in Vivek's SQL Notes on 10 July 2015

Script to find the complete weeks within two given dates

Sometimes we need to find out the complete weeks within two given dates. Below script will help in finding the complete weeks within 2 given dates. In this script, I have used below dates as example 

Startdate=2015-04-12
Enddate=2015-06-10 

SET DATEFORMAT YMD
if (object_id('tempdb..#weekdays') is not null)
drop table #weekdays

Declare…

Read more

0 comments, 347 reads

Posted in Vivek's SQL Notes on 10 July 2015

Importance of Best Practices in database programming

For any programming language, just writing the code is not well enough. It should be written using the best practices. This article will try to explain the disadvantages of writing code without using Best Practices and latter on how best practices can be implemented in our database code.

Code written…

Read more

0 comments, 1,718 reads

Posted in Vivek's SQL Notes on 1 February 2015

SQL Script to find the missing indexes

Performance tuning in SQL is important exercise and index creation is an important part of it. Below script will help in finding the missing indexes. Once you create these indexes, it will help in improving the Performance.

SELECT db_name(d.database_id) dbname

, object_name(d.object_id) tablename
, d.equality_columns
, d.inequality_columns
, d.included_columns
,'CREATE INDEX [missing_index_' +…

Read more

1 comments, 1,385 reads

Posted in Vivek's SQL Notes on 25 January 2015

SQL SERVER - Data types

In relational database, we store data in tabular form where data is divided into columns. Each column has a name and a data type which shows what type of data is going to store in that column. Below are the data types which are mostly used in SQL server. 

CHARACTER(n)   

Read more

0 comments, 451 reads

Posted in Vivek's SQL Notes on 25 January 2015

SQL Server - Convert() function

Convert () function in SQL Server to convert an expression from one data type to another data type

Syntax for CONVERT function
CONVERT ( data_type [ ( length ) ] , expression [ , style ] )

Convert functions is usually used with date/time data type to convert a date in different formats. Below examples…

Read more

0 comments, 834 reads

Posted in Vivek's SQL Notes on 24 January 2015

SQL Script to find the list of all the jobs failed yesterday

One of the important task of any DBA is to find out all the jobs which are failed yesterday. Below SQL Script can be used to find out all the jobs which are failed yesterday.

SELECT DISTINCT
CAST(CONVERT(datetime,CAST(run_date AS char(8)),101) AS char(11)) AS 'Failure Date',
SUBSTRING(T2.name,1,40) AS 'Job Name',
T1.step_id…

Read more

0 comments, 2,042 reads

Posted in Vivek's SQL Notes on 20 January 2015

SQL Script to search stored procedures containing a given text

Sometimes we need to find out how many stored procedures contains a given text. Below SQL query can be used to find out the list of all the stored procedures which contains a  particular given text as input.

SELECT OBJECT_NAME(object_id), OBJECT_DEFINITION(object_id)
FROM sys.procedures
WHERE OBJECT_DEFINITION(object_id) LIKE '%Given text%'

Read more

1 comments, 385 reads

Posted in Vivek's SQL Notes on 20 January 2015

SQL Script to find the tables created from a given date

Below is the SQL query which can be used to find out the tables which are created or modified on or from a given date.

SELECT
        [name] as Tablename
       ,create_date
       ,modify_date
FROM
        sys.tables where cast(create_date as…

Read more

0 comments, 446 reads

Posted in Vivek's SQL Notes on 20 January 2015

SQL Script to find the databases size

Sometimes we need to find out the size of the database on a server. Below SQL Scripts can be used to find out the size of all the databases created on the server. 

;WITH DBSize (SqlServerInstanceName, DatabaseName, DatabaseSize, DBLogSize, TotalDBSize)
AS
(
  SELECT      @@SERVERNAME SqlServerInstanceName,
 …

Read more

0 comments, 350 reads

Posted in Vivek's SQL Notes on 20 January 2015

T-SQL script to find the growth size of database files

Below query can be used to see the growth size of database files.

DECLARE @filename NVARCHAR(1000);
DECLARE @bc INT;
DECLARE @ec INT;
DECLARE @bfn VARCHAR(1000);
DECLARE @efn VARCHAR(10);

-- Get the name of the current default trace
SELECT @filename = CAST(value AS NVARCHAR(1000))
FROM ::fn_trace_getinfo(DEFAULT)
WHERE traceid = 1 AND…

Read more

0 comments, 816 reads

Posted in Vivek's SQL Notes on 9 January 2015

T-SQL script to find the highly populated tables in database

Sometimes we need to check which tables of our database is highly populated. Below is the T-SQL Script which we can use to find out that.

SELECT 
    t.NAME AS TableName,
    i.name as indexName,
    sum(p.rows) as RowCounts,
    sum(a.total_pages) as TotalPages, 
    sum(a.used_pages)…

Read more

0 comments, 677 reads

Posted in Vivek's SQL Notes on 9 January 2015

Older posts