Without Views there is no program in any project. Since there are lot of benefits with Views. Many programmers still have confusion how to create Views and why Views are required. This post clears all your questions with syntax for Views in SQL.
There are four different SQL functions in SQL. Each function makes you so confuse when you are very beginner. This post explains SQL functions in Simple manner for beginners as well as for advanced programmers and developers.
The secondary index is most critical object, after the primary index. This post explains the most optimum value for number of secondary indexes you can give on any Table.
The differences between SQL index and Database index is little tricky question. This is the most confusing and discussed in many social media. The differences listed here are simple and you can grasp the subject quickly.