Which object is used to add relationship between two Datatables?


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How to create data relations?

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If we want to connect to many databases in dataaccess layer such as MSAccess,Sql server,oracle means not to a particular database depends on condition we have to connect to appropriate database in this scenario if we without changing code Ho wdo you handle this situation?

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once data is fetched into dataset connection gets closed. but in datareader connection is always maintained...then why datareader is fast and mainly recommended ?

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What is the maximum pool size in ado.net connection string?

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Explain how to copy the contents from one table to another table and how to delete the source table in ado.net?

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What are the different ado.net namespaces?

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List all the steps in order, to access a database through ado.net?

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