By Thearon Willis
As some of the most well known programming languages on the earth, visible uncomplicated maintains to extend at the performance and suppleness of its framework. This booklet explains tips to use visible uncomplicated 2005 to put in writing effective database functions that may be used all through an company.
With this educating device, you will the right way to use queries, perspectives, and kept approaches to successfully entry and control facts out of your functions. you will get a company grab on utilizing ADO.NET in addition to OleDb, SQL, and Oracle to entry particular databases. Plus, hands-on examples and try-it-out routines assist you placed your analyzing into perform in order that with each one bankruptcy, you are going to steadily construct the items of a unmarried software.
What you'll examine from this ebook
- How ADO.NET maintains to adapt as a development block for getting access to and manipulating info in relational databases
- Ways to encrypt and decrypt information, hash passwords, and additional safe entry in your information
- Techniques for gaining access to your internet carrier from either Windows(r) and internet functions
- Best practices for utilizing company good judgment and knowledge entry parts to provide file facts or replace facts on your back-end databases
Who this booklet is for This e-book is for builders who are looking to learn how to write database purposes and back-end databases, akin to Microsoft(r) entry, Microsoft(r) SQL Server, and Oracle(r). a few event with visible easy 2005 is useful yet now not required.
Wrox starting publications are crafted to make studying programming languages and applied sciences more straightforward than you think that, delivering a based, educational layout that might consultant you thru the entire recommendations concerned.
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Additional info for Beginning Visual Basic 2005 Databases
For example, an employee is an object and the employee’s manager is an object. Next, you want to identify which attributes make up the employee and manager objects. Tables 1-3 and 1-4 illustrate the attributes that have been identified for these objects. Table 1-3: Employee Attributes Attribute Description Employee Name The name of the employee Phone Number The phone number for the employee Location The location where the employee works (for example, city, building, or branch office) Job Title The job title of the employee Table 1-4: Manager Attributes Attribute Description Manager Name The name of the manager Phone Number The phone number for the manager Location The location where the manager works (for example, city, building, or branch office) Now that you have identified all the attributes for these objects, you must identify the tables to which these attributes should be assigned.
To 5 Chapter 1 do so, you must first delete the row of data containing the foreign key or update the column using a NULL value. Only then are you able to delete the row containing the primary key. Referential integrity is based on the relationship between foreign and primary keys and ensures that key values are consistent across all tables. Referential integrity is automatically enforced by SQL Server and prevents a user from updating a primary or foreign key in a manner that would break the integrity of the data.
Instead, you’ll focus on the other tables shown in the schema. Before you look at the other tables, however, take note of the data types used in the Groups, Projects, and GroupProjects tables. These data types have been converted from Access data types to SQL Server data types. A complete data type cross reference is available in Appendix A. Of particular interest is the data type for the primary keys. SQL Server has a native data type, called a UniqueIdentifier, that supports Guids as seen in the schema.
Beginning Visual Basic 2005 Databases by Thearon Willis