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How to use ExecuteScalar() method

Ganeshji
Posted by under ADO.NET category on for Beginner level | Points: 250 | Views : 50945 red flag
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This article is describing the use of ExecuteScalar() method.

Introduction


We can use ExecuteScalar() method, if we have to retrieve a single value from a database. It executes the query and returns the first column of the first row in the result set returned by the query. Additional rows and columns are simply discarded. It returns a maximum of 2033 characters. It is better to get the result of MAX,MIN,COUNT, etc using ExecuteScalar() method.

Benefit


1. ExecuteScalar() requires the less code than using ExecuteReader().
2. ExecuteScalar() immediately returns the actual value. Hence, in case of retrieving single value from a database, it is fast and efficient.


INSERT










The following figure shows the records inserted using cmd.ExecuteScalar() method.






MAX








MIN





COUNT





Returns an object type


ExecuteScalar() method returns an object type.



So when i m trying to initialize the result of cmd.ExecuteScalar() method in an integer variable, it is giving the below given error.






Conclusion


Happy Reading!

Reference


http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.executescalar.aspx


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About the Author

Ganeshji

Full Name: Zinnia Sarkar
Member Level:
Member Status: Member
Member Since: 7/24/2010 12:50:40 PM
Country: India
Regards, Ganeshji

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Comments or Responses

Posted by: Seenuvasan on: 6/10/2011 | Points: 25

nice article ganeshji

Posted by: Ganeshji on: 6/10/2011 | Points: 25

Thnx Seenuvasan!

Posted by: Akiii on: 8/16/2011 | Points: 25

good article zinnia...

Thanks and Regards
Akiii

Posted by: Ganeshji on: 8/17/2011 | Points: 25

Thnx Akii!

Posted by: Ksuresh on: 12/26/2011 | Points: 25

Good Article and Thanx for in solving my problem....

Posted by: Ganeshji on: 12/26/2011 | Points: 25

Thnx Ksuresh! Keep reading!

Posted by: Shameer.Ali87 on: 6/6/2012 | Points: 25

nice article Ganeshji....

Posted by: Sangeetha Mani on: 3/4/2013 | Points: 25

hi ,

thanks for posting this article.. but i have confused .. actually execute scalar method for aggregate function. then why should you using insert command .. ?

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