Golgappa.net | Golgappa.org | BagIndia.net | BodyIndia.Com | CabIndia.net | CarsBikes.net | CarsBikes.org | CashIndia.net | ConsumerIndia.net | CookingIndia.net | DataIndia.net | DealIndia.net | EmailIndia.net | FirstTablet.com | FirstTourist.com | ForsaleIndia.net | IndiaBody.Com | IndiaCab.net | IndiaCash.net | IndiaModel.net | KidForum.net | OfficeIndia.net | PaysIndia.com | RestaurantIndia.net | RestaurantsIndia.net | SaleForum.net | SellForum.net | SoldIndia.com | StarIndia.net | TomatoCab.com | TomatoCabs.com | TownIndia.com
Interested to Buy Any Domain ? << Click Here >> for more details...

  1. Categories >> Software >> Databases >> SQL Server
  2. Suggest New Category

Can we rewrite subqueries into simple select statements or
with joins? Example?

Question Posted / guest

Answers were Sorted based on User's Feedback



Can we rewrite subqueries into simple select statements or with joins? Example?..

Answer / divya kalra

Subqueries can often be re-written to use a standard outer
join, resulting in faster performance. As we may know, an
outer join uses the plus sign (+) operator to tell the
database to return all non-matching rows with NULL values.
Hence we combine the outer join with a NULL test in the
WHERE clause to reproduce the result set without using a
sub-query.

Is This Answer Correct ?    4 Yes 1 No

Can we rewrite subqueries into simple select statements or with joins? Example?..

Answer / syed sajjad

Yes we can write using Common Table Expression (CTE). A Common Table Expression (CTE) is an expression that can be thought of as a temporary result set which is defined within the execution of a single SQL statement. A CTE is similar to a derived table in that it is not stored as an object and lasts only for the duration of the query.

Is This Answer Correct ?    1 Yes 0 No

Post New Answer

More SQL Server Interview Questions

Do you know what are the steps to process a single select statement?

0 Answers  

What is for xml in sql server?

0 Answers  

what's the difference between a primary key and a unique key? : Sql server database administration

0 Answers  

How To Make password Protected SQL Server 2005 Database i.e when i open SQL Server database then ask for password.

1 Answers  

what is raid? : Sql server database administration

0 Answers  

Explain about temporary stored procedure?

0 Answers  

What are different types of subquery?

0 Answers  

Whether the updations made to the views reflect the original records in the table

5 Answers   NIIT,

What are basics of policy management?

0 Answers  

Can truncate be rolled back?

0 Answers  

What is database black box testing?

0 Answers  

Which feature in sql server 2008 has surprised you? You can name just one. : sql server database administration

0 Answers  

For more SQL Server Interview Questions Click Here
Categories