Answer / gaytriom

A primary key is a column which uniquely identifies the
records in a table. In a broad sense, a primary key is the
mixture of a unique key and an index: A collumn with a primary
key is indexed to deliver a faster query, and doesn't allow
duplicate values to ensure specific data.

A foreign key is a column (the child collumn) in a table which
has a corresponding relationship and a dependency on another
collumn (the parent collumn) that is usually in a different
table. Parent collumns can have multiple child collumns, but a
child collumn can only have one parent collumn.

Answer / vimal chauhan

Primary key does't allow null value
while foreign key allow null value

why should i use FormsAuthentication.RedirectFromLoginPage (); Method in Form Authentication?Without using this method also it's good??

2 Answers  

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What does assemblyinfo.cs file consist of?

2 Answers   Accenture, HCL,

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How many web.config files can I have in an application?

0 Answers  

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What is caching? What are different ways of caching in asp.net?

0 Answers  

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WHAT IS OBJECT POOLING

2 Answers   Fidelity,

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Suggest 3 best practices in detail for for Developing High Performance Web and Enterprise Applications

2 Answers   Techno Solutions,

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Can you please anyone explain in detailed Webservices concepts in Asp.net?

1 Answers  

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You are creating a Web site for Your company. You receive product lists in the form of XML documents. You are creating a procedure to extract information from these XML documents according to criteria that your users will select. When a user makes a request, you want the results of these requests to be returned as quickly as possible. What should you do? A . Create an XmlDataDocument object and load it with the XML dat Use the DataSet property of the object to create a DataSet object. Use a SQL SELECT statement to extract the requested dat B . Create an XmlDataDocument object and load it with the XML data. Use the SelectNodes method of the object to extract the requested data. C . Create an XPathDocument object and load it with the XML data. Call the CreateNavigator method to create an XPathNavigator object. Call the Select method of the XPathNavigator object to run an XPath query that extracts the requested data. D . Create an XmlReader object. Use the Read method of the object to stream through the XML data and to apply an XPath expression to extract the requested data.

1 Answers   Syntax Softtech,

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Explain what is clr?

0 Answers  

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How would you turn off cookies on one page of your website?

0 Answers  

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Just by seeing the signature of the bean how can you specify whether it is a stateful or stateless session bean?

0 Answers  

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How do I open an ashx file in windows 7?

0 Answers  

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