Updating in linq to sql

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This will create all the mappings and settings for each table and their entities.

For files the database connection string is defined in the web.config file as: We can use a connection string from the web.config file or we can pass a connection string as a parameter in the constructor of the Data Context class to create an object of the Data Context class.

That articles also covered for creating select query for retrieving both single and multiple results.Each instance of a class entity represents a row within the database table.When we defined our data model, the LINQ to SQL designer also created a custom Data Context class that provides the main conduit by which we'll query our database and apply updates/changes.Drop Column Syntax Sometimes we will wish to delete a column from an existing table in SQL.To do this, we specify that we want to change the table structure via the ALTER TABLE command, followed by a specification indicating that we want to remove a column.

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