By Carsten Thomsen
The e-book is lifeless, and i'm a instructor, so i do know what i'm speaking approximately. No ask yourself i used to be in a position to get a used reproduction for that affordable. every person who purchase it's attempting to put off it. I seemed via it as soon as and not took it up again.
This can't aid anyone. It like studying whatever in a newspaper. No technique to practice it.
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Extra info for Database Programming with C#
NET programming model. NET Data Provider loosely maps to an OLE DB provider, it's in fact a lot closer to the ADO object model. NET Data Providers higher performance. NET, you are effectively using only one layer as compared to using the ADO layer connected to the OLE DB layer. NET Data Provider, but this is even more of a "merger," because with ADO you also have the OLE DB provider and the ODBC driver to pass through when connecting to an ODBC data source. Here's another way of looking at this.
Let's check the normal forms one by one and see if the UserMan database really does conform to 5NF. • 1NF: All repeating groups of data have been put into separate tables. • 2NF: Only the tblUserRights table has a composite primary key, but this table is a link table and therefore doesn't hold any "real" data. Basically, the absence of nonkey columns means that you don't have any functional dependencies on a partial key. • 3NF: All nonkey fields in the tables relate to the primary key. • 4NF: The UserMan database has doesn't have any relations or primary keys with three or more attributes; thus, no multivalued dependencies exist.
You can use indexes to give your clients a variety of ways to access the data without duplicating it. Keys serve as pointers to the data, which means they're valuable tools for avoiding duplicated data. • Manipulation: Editing a phone book is certainly not an easy task. You can strike over the text in case a phone number no longer exists, but what about changing the owner of a phone number or adding a new phone number? In how many places will you have to edit and/or add data? This just won't work, unless you're willing to redo the whole phone book!
Database Programming with C# by Carsten Thomsen