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By Thearon Willis
As some of the most well known programming languages on this planet, visible uncomplicated keeps to extend at the performance and suppleness of its framework. This ebook explains how you can use visible uncomplicated 2005 to jot down effective database functions that may be used all through an company.
With this educating software, you are going to tips on how to use queries, perspectives, and kept strategies to successfully entry and control info out of your functions. you will get a company clutch on utilizing ADO.NET in addition to OleDb, SQL, and Oracle to entry particular databases. Plus, hands-on examples and try-it-out workouts assist you positioned your interpreting into perform in order that with each one bankruptcy, you are going to steadily construct the items of a unmarried application.
What you are going to research from this book
- How ADO.NET keeps to conform as a development block for getting access to and manipulating facts in relational databases
- Ways to encrypt and decrypt information, hash passwords, and extra safe entry in your data
- Techniques for gaining access to your internet provider from either Windows(r) and internet applications
- Best practices for utilizing enterprise good judgment and knowledge entry parts to provide document facts or replace info on your back-end databases
Who this booklet is for
This ebook is for builders who are looking to discover ways to write database purposes and back-end databases, resembling Microsoft(r) entry, Microsoft(r) SQL Server, and Oracle(r). a few event with visible easy 2005 is beneficial yet now not required.
Wrox starting publications are crafted to make studying programming languages and applied sciences more straightforward than you think that, supplying a based, instructional structure that may consultant you thru the entire innovations involved.
Read Online or Download Beginning Visual Basic 2005 Databases (Programmer to Programmer) PDF
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Additional info for Beginning Visual Basic 2005 Databases (Programmer to Programmer)
Example text
Also note that there is a foreign key relationship to the Groups table. Every user will be assigned to a group and this key provides the relationship between the Groups and Users tables. Also notice that there is a foreign key relationship to the Roles table. Every user will be assigned to a role. The Roles table contains the various roles that may be assigned, such as Administrator, Manager, and User. The Roles table contains a column called Ranking. The roles will be defined by rank, so a role of Administrator has a higher ranking than Manager, and the Manager role has a higher ranking than User.
However, you can create multiple data files, and most typical production databases contain at least two data files. Data files are complex because they contain the various objects that make up your database. In Oracle terminology, these objects are known as segments. Because of the complexities of an Oracle data file, Table 1-2 contains only a partial list of the various objects, which you can compare to SQL Server data files. Table 1-2: Oracle Data File Objects 8 Object Description Tables Contains the data in a database, organized in a row-column format.
A transaction is the execution of a group of SQL statements as one logical unit of work. SQL Server automatically manages transactions in the transaction log, generating a before-and-after picture of the data in a table that is changed. This means that you can execute an update query to update a row of data and SQL Server logs a record of the data before it was changed and after it was changed. This allows for backward and forward recovery of the data in your database. SQL Server manages transaction logging automatically.