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 beginner 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 valid begin in constructing console, home windows varieties, 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 certain and code-practical options to entry facts in C# throughout quite a lot of particular coding occasions. absolutely revised and upgraded for .NET 2.0, this e-book will give you the simplest modern perform during this center programming sector, and you’ll end up utilizing it in the majority of your .NET tasks. This booklet systematically:
- Provides step by step directions on fitting and configuring visible C# and SQL Server convey variants
- Presents all crucial SQL question and replace suggestions and syntax, so that you dont want past familiarity with relational databases or SQL
- Describes easy methods to use ADO.NET transactions, exceptions, and occasions
- Covers ADO.NET positive aspects for dealing with XML, textual content, and binary information
- Explains all recommendations via ordinary code examples
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Additional info for Beginning C# 2005 Databases
The databases needn’t be on the same DBMS, or even on the same computer. This has important implications for backing up because it means that if one computer goes down, you have a mirrored copy of the data ready to go. Of course, this isn’t a replacement for backing up — after all, it’s possible that both computers could fail at the same time. However, it does provide a fail-safe option for when things go wrong and can enable you to keep client applications running while you fix the problem. Another way that mirroring databases can be useful is where extremely large numbers of clients are using the data, or where a huge amount of data is routinely transferred to and from clients.
Good use of filtering can be important in the performance of your applications because minimizing the amount of data that is exchanged between your applications and your databases will lessen the time taken to make these exchanges. Using Joins to Retrieve Data The SELECT keyword can also be used to obtain data from multiple tables. There are alternative ways of doing this, of course, such as using complicated nested queries, but the simplest and most common way is to perform a join between pairs of tables in the query.
SQL statements are often made up of several parts, which are known as clauses. SQL statements may also contain embedded (nested) statements known as subqueries. SQL statements are executed, and may return one or more results. ” In some SQL dialects, a semicolon (;) is used to signify the end of a statement, although that is generally not required, because the context is enough to tell where one statement ends and the next begins. Retrieving Data from Tables Data retrieval is, as you’ve already seen, the job of the SELECT keyword.