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Updating dataset creation dates

LINQ to SQL will keep track of these additions/removals, and automatically execute the appropriate SQL INSERT or DELETE statements when Submit Changes() is invoked.I can add a new product to my database by creating a new "Product" class instance, setting its properties, and then by adding it to my Data Context's "Products" collection: When we call "Submit Changes()" above a new row will be created in our products table.What makes O/R mappers like LINQ to SQL extremely flexible is that they enable us to easily model cross-table relationships across our data model.For example, I can model each Product to be in a Category, each Order to contain Order Details for line-items, associate each Order Detail line-item with a Product, and have each Customer contain an associated set of Orders.Submit Changes() above, LINQ to SQL will dynamically construct and execute a SQL "UPDATE" statement that will update the two product property values we modified above.I could then write the below code to loop over unpopular, expensive products and set the "Reorder Level" property of them to zero: When I call northwind.NET Framework 3.5 release, and which enables you to easily model relational databases using . You can use LINQ expressions to query the database with them, as well as update/insert/delete data.Below are the first three parts of my LINQ to SQL series: In today's blog post I'll cover how we we can use the data model we created earlier, and use it to update, insert, and delete data.

When we perform queries and retrieve objects like the product instances above, LINQ to SQL will by default keep track of any changes or updates we later make to these objects.We can make any number of queries and changes we want using a LINQ to SQL Data Context, and these changes will all be tracked together.After making the changes we want to the objects we've retrieved from LINQ to SQL, we can then optionally call the "Submit Changes()" method on our Data Context to apply the changes back to the database.For another example of how LINQ to SQL can help manage cross-table relationships for us and help clean up our code, let's look at an example below where I'm creating a new Order for an existing customer.After setting the required ship date and freight costs for the order, I then create two order line-item objects that point to the products the customer is ordering.In addition to updating existing rows in the database, LINQ to SQL obviously also enables you to insert and delete data.You can accomplish this by adding/removing data objects from the Data Context's table collections, and by then calling the Submit Changes() method.Over the last few weeks I've been writing a series of blog posts that cover LINQ to SQL.LINQ to SQL is a built-in O/RM (object relational mapper) that ships in the .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.


  1. Control access to your table data Get information about your tables List the tables in a dataset Get table metadata using meta-tables For more information.

  2. TMSEXPDT Utility -- Reset Expiration Dates in. to be able to override expiration dates set. days to the creation date of the data set to.

  3. Dataset Title Nenana Ice Classic Tanana River Ice Annual Breakup Dates Dataset Series Name NSIDC-0064. Creation and Review Dates.

  4. This is the last post in a three-part series about Tableau data extracts. In the first post, we looked at how Tableau data extracts are built and used by Tableau. In.

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