A case that where java is not case-sensitive !!

All of us know that java  is a case-sensitive language. But there is a case where java doesn't follow the case-sensitive fashion. Java is not case-sensitive when it comes to literals.
There are various types of literals-Boolean Literals, Character Literals, Integer Literals, Floating-Point Literals, String Literals, Null Literals. For example,

int  Value = 0X64;
In Integer Literals, Hexadecimal literals begin with 0x or 0X, followed by the ASCII digits zero through nine and the letters a through f (or A through F). So when we write 0X  in the place of 0x, java compiler will not generate any error.

Why Pointers Are Not Used In Java ??

The pointers aren't used in java language.The reason is that through pointers you can be able to access any memory address. So java developers wanted to have a language that should be secure and not allow anyone to deal with the addresses.That is why they didn't involve pointers in java language.
But we can't say that pointers are not used in java language at all, they can be used indirectly with the use of tools.

How QBE Differs From SQL?

Today in this post, you will learn what is QBE and how QBE is different from SQL.  

QBE  stands for Query By Example. It is a method of query creation that allows the user to search for documents based on  an example. Here are some points that describe the differences between them :-

1. QBE differs  from SQL in that the user doesn’t have to specify a structured query explicitly.
2. QBE is easy to learn than SQL, especially for non-specialists.
3. In QBE the query is formulated by filling in templates of relations that are displayed on the screen.
4. The user doesn’t  have to remember the names of the attributes or relations, because they are displayed as part of the templates. 
5. In terms of DBMS, QBE can be thought of “fill in the blanks” methods of query creation. The Microsoft Access Query Design Grid is an example of QBE. 
6. QBE can be used for selecting , modifying, deleting and inserting values. The following figure is a Grid that shows the SELECT Query performed on EMPLOYEE table.

7.  The tables of a database can be  specified interactively and a table definition can also be updated by adding, renaming or removing columns. 
8.  QBE is the user-friendly and visual relational database language. 
9.  QBE doesn’t use the ‘linear’ style of SQL rather it is a ‘two-dimensional’ language.

 

How Selection Committee Performs The DBMS Selection ?

The Selection Committee comprises of people from the various departments, the top management and  outside experts. The Selection Committee performs the task of choosing a package for the company.They provide their own experiences, skills and processes to address the three important areas- usability, performance and stability.
Once the committee has evaluated all the tools that have cleared the pre-evaluation criteria, listen to the vendor presentations and demos and have got the pending issues cleared, a decision is reached- on  which DBMS package to buy.
Once the committee has reached a decision on a product, it is good to visit a few companies that have installed the particular product and see it in action. By visiting 4 - 5 installations should give the committee a good idea about the product. If the committee members feel  that their decision is right, then the company can proceed with the purchasing and implementation. But if anybody  doesn't feel that the product is not up to the expected standard, then the committee should sit and discuss and do the analysis again. So the DBMS that has got the maximum point rating system will be the best suited for the company. This decision might save the company from the potential disaster.

Learn How Databases Are Accessed On The Web??

In general, we can't connect a remote user's web browser directly to a database system. There are exceptions to this-java applets are one way around it. The browser talks to a program running on the web server that is an intermediate to the database. This program is CGI ( Common Gateway Interface) script, a java servlet or some code written inside an ASP or JSP document. The program retrieves the information from the database and sends it to the user as HTML pages. The following  figure shows the interaction between a user and a web-based database system:-

1.   The user types in a URL or fills a form or submits a search a search on a web page.
2.  The browser sends the user's query from the browser to the web server, which passes it on to a CGI  script. CGI is a predefined system for transferring data across the Internet.
3. The CGI Script converts the query into SQL commands and sends to the Database server.
4. The database server executes the SQL commands passes the results to the CGI Script.
5. The CGI Script generates an HTML document and sends it to the web server.
6. The web server sends the HTML document to the user.

If the user had sent some information to update a database, then the CGI Script will generate the appropriate SQL commands and send it to the database server. The database server will execute the commands and then send the result to the user.
E.g :-  An example of an insert operation will be filling up a form on your browser to so online registration  for exam. Another  example for an update operation will be updating your profile on Facebook.

How To Open Ms Word Using Run Command???

Today I'll Teach You How We Can Open Ms Word Using Run Command.There Are Following Steps:

1) Click On Start Menu Or Press Win+R Keys.
2) Open Run Command.
3) Type 'winword' On Open Box.
4) Press Enter Key.
You Will See Your Ms Word Will Be Opened.
 If You Will Be Successful To Open It, Leave a Comment And Send Feedback By Comment Or By Sharing.

Learning And Speaking English Is Easy Now !

 Most Of People Find Difficulty In Speaking In English Language Even They Know It Very Well.
Why?
Yes! We Have Brought A Solution To That Problem.
Here's A Pdf  File That Will Encourage You To Speak In English Fluently.
If You Find It Helpful Then Kindly Share It With Others.
Click To Download