By Prabhakar Chaganti, Rich Helms
This publication is a realistic real-world instructional overlaying every thing you want to find out about Amazon SimpleDB. you are going to come upon examples in 3 languages: Java, Hypertext Preprocessor, and Python. This e-book is geared toward reworking you from a newbie to a sophisticated developer. while you're a developer desirous to construct scalable web-based database purposes utilizing SimpleDB, then this booklet is for you. you don't want to understand something approximately SimpleDB to learn and examine from this e-book, and no easy wisdom is exactly priceless. This consultant can assist you to begin from scratch and construct complex functions.
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Extra resources for Amazon SimpleDB Developer Guide: Scale your application's database on the cloud using Amazon SimpleDB
The previous version of SimpleDB only supported a query-style syntax that is now being deprecated in favor of the simpler and easier-to-use SELECT expressions. select("SELECT name FROM `prabhakar-dom-1` WHERE make='BMW'") >>> for result in rs: ... name ... car1 car2 >>> Multiple attributes can also be specified as a part of the query. select("SELECT name FROM `prabhakar-dom-1` WHERE make='BMW' AND model='X5'") >>> for result in rs: ... name ... car2 >>> [ 41 ] Getting Started with SimpleDB You can delete a specific item and all of its attributes from a domain.
In this example, we will create a simple contact database, with contact information as raw data. ID First_Name Last_Name Phone_Num 101 John Smith 555-845-7854 101 John Smith 555-854-9885 101 John Smith 555-695-7485 102 Bill Jones 555-748-7854 102 Bill Jones 555-874-8654 The obvious issue is the repetition of the name data. The table is inefficient and would require care to update to keep the name data in sync. To find a person by his or her phone number is easy. SELECT * FROM Contact_Info WHERE Phone_Num = '555-854-9885' So let's analyze the strengths and weaknesses of this database design.
All programs are complete and can be run unaltered on your server. The samples use PHP 5. php) provides access to all samples. When a program is run, the source is shown below in a box. If the free package Generic Syntax Highlighter (GeSHi) is installed, the source will be formatted when displayed. com/highlighter/. [ 32 ] Chapter 2 The samples are structured into groups: entering your Access Keys, domains, items, and attributes; data normalization, select, and S3; and backing up SimpleDB into S3.