heartin's blog

Basic SQL DDL Commands

Submitted by heartin on Wed, 03/27/2013 - 21:41

DDL stands for Data Definition Language, and these queries are used to create or manipulate the structure of the database and schemas. Here we will see basic DDL queries that you will use in general. Please feel free to add more through the comments section.

Basic SQL Concepts

Submitted by heartin on Sun, 03/17/2013 - 02:28

First we will look at some commonly asked questions based on the contents of this page. You can refer to getting-started-with-oracle-xe-and-jdbc-hands-On for setting up oracle xe and database for examples here: create 2 tables employee and emp, with 2 columns empName and id; and insert data with ids ranging from 1 to 5. You might have to use some common sense for some of the examples, like deleting/modifying duplicate data.

Interface vs Abstract Class - A Quick Comparison

Submitted by heartin on Sun, 03/10/2013 - 23:13

We already learned what an abstract class is and what an interface is. We will now do a detailed comparison of interfaces and abstract classes, followed by a listing of points in favor of each of them, as this is also a very common interview question in Java.

Best Practices for Multithreading in Java

Submitted by heartin on Sat, 03/09/2013 - 11:19

This article lays down some of the best practices which you can use during your design or code reviews, and assumes that you are familiar with the basics of mutithreading in java available at articles/multithreading.

Best Practices for Using and Writing Exceptions in Java

Submitted by heartin on Wed, 03/06/2013 - 08:39

This article lays down some of the best practices which you can use during your design or code reviews, and assumes that you are familiar with the basics of exceptions in Java.

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