Download PDF by Jacob Hammer Pedersen, Syed Fahad Gilani, Jon Reid, Visit: Beginning C# 2005 Databases
By Jacob Hammer Pedersen, Syed Fahad Gilani, Jon Reid, Visit Amazon's James Huddleston Page, search results, Learn about Author Central, James Huddleston, , Ranga Raghuram
Beginning C# 2005 Databases: From amateur to Professional teaches you every thing you must find out about relational databases, the SQL database language, and ADO.NET 2.0. You’ll additionally get a legitimate begin in constructing console, home windows types, ASP.NET, or even XML database applications.
This booklet additionally teaches you database fundamentals and the way to take advantage of SQL to speak with databases. You’ll get specified and code-practical suggestions to entry information in C# throughout quite a lot of particular coding events. absolutely revised and upgraded for .NET 2.0, this publication will give you the simplest modern perform during this center programming quarter, and you’ll end up utilizing it in the vast majority of your .NET initiatives. This publication systematically:
- Provides step by step directions on fitting and configuring visible C# and SQL Server convey variants
- Presents all crucial SQL question and replace ideas and syntax, so that you dont desire previous familiarity with relational databases or SQL
- Describes easy methods to use ADO.NET transactions, exceptions, and occasions
- Covers ADO.NET gains for dealing with XML, textual content, and binary info
- Explains all innovations via simple code examples
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Extra info for Beginning C# 2005 Databases
For example, imagine you have a database with a table representing a list of bank accounts and balances. Transferring an amount from one account to another involves subtracting an amount from one account and adding it to another (with perhaps a three-day delay if you are a bank). These two operations must be part of a transaction because if one succeeds and one fails, then money is either lost or appears from nowhere. Using a transaction guarantees that the total of the money in the accounts remains unchanged.
Qxd:WroxBeg 9/12/06 10:31 PM Page 24 Chapter 1 You’ll return to inner joins in subsequent chapters. One last note for now: It is possible to use operators other than = to join tables. For numeric fields you can, for example, use >. The results of this are more difficult to illustrate (and to explain the usefulness of), but it’s something to bear in mind for later. Understanding Outer Joins The other types of join that you can perform are outer joins. As mentioned earlier, these are like inner joins, but are where rows that aren’t joined to other rows may be included in the result set.
You would need to tell the DBMS to create an index for values in the phone number column because, by default, no indexes are created for a table other than for primary key values. By building an index based on the phone number column, the DBMS can use a much faster searching algorithm to locate rows — it no longer has to look at the phone number column of every row in the address book; instead it looks in the index (which has, effectively, already looked at every row in the address book) and finds the relevant rows.
Beginning C# 2005 Databases by Jacob Hammer Pedersen, Syed Fahad Gilani, Jon Reid, Visit Amazon's James Huddleston Page, search results, Learn about Author Central, James Huddleston, , Ranga Raghuram