Posted by admin on December 25, 2009
What are Keywords in C Language ?
Keywords are the words that convey a special meaning to the “C compiler“. These are reserved for a special purpose.
Keywords are also called as “reserved words”. We cannot use keywords as variable names because if we do so then it means that we are assigning some new meaning to the keyword. If we happen to use a keyword as a variable then the compiler will not execute the code and an error condition will be raised.
There are few C compilers which allow us to declare identifiers or variable names that exactly resemble the keywords. However, one should keep in mind not to mix up variables with the keywords. WAIT! There is more to read… read on »
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Definition of SQL Language:
SQL is a computer/programming language which enables a user or any application to interact with an SQL capable database management systems or DBMS. SQL is a great tool to deal with databases. It is used to access and manipulate databases & It is very easy to implement.
In this tutorial, we will explain about the basics of SQL language, its history and its implementations.
SQL stands for Structured Query Language.
It is an ANSI (American National Standards Institute) standard language used for accessing and manipulating databases.
There are different databases, such as, MySQL, SQL Server, Access, Oracle, Sybase, DB2, and other database systems. We will basically deal with Oracle. WAIT! There is more to read… read on »
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Filed Under: SQL
Posted by admin on December 23, 2009
Structure Of A C Language Program
The best way to start understanding the structure of a C program is to explain it with the help of a small and a simple program. So let us take a simple program example to begin :
/* simple program in C */
#include
int main()
{
printf(“ \n welcome to the world of C ”);
return 0;
}
Now we can see that there are several components or forms in the above example and each of the above component has it’s own significance and importance.
These components or forms can be named as : WAIT! There is more to read… read on »
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SQL Sequences Introduction:
The use of sequence is very important in Oracle. A sequence is a database item that generates a sequence of integers. It is a set of integers that are used to create a unique number to act as a primary key.
Sytax of an Oracle Sequence
The syntax for a sequence is:
CREATE SEQUENCE sequence_name
MINVALUE value
MAXVALUE value
START WITH value
INCREMENT BY value
CACHE value;
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Filed Under: SQL
Posted by admin on December 22, 2009
Introduction To C Programming Language:
History Of C Programming Language
Mr. Dennis Ritchie: Founder Of C Language
Dennis Ritchie
Mr. Dennis Ritchie of USA designed C programming language in 1972 which was developed at “AT & T’s Bell Laboratories”. It’s purpose was to operate on the UNIX operating system which was the most common operating system at that time.
Due to certain good characteristics of C i.e. it’s powerful and dominant behavior make it’s use quickly spread beyond Bell labs. In the late 70’s C was so popular that it replaced many well known languages of that time. It was used in almost all sort of programs. Many different organizations began applying different versions of C. This caused a serious problem for system developers. A committee was formed in 1983 by the American National Standards Institute (ANSI) in order to solve this problem which resulted in the approval of another version of C in 1989 which is known as ANSI C. Almost every modern C compiler has tendency to withstand this standard. ANSI C was later also approved by the International Standards Organization (ISO) in 1990.
àAnother language called B was developed by Ken Thompson before the development of C which is also known as predecessor of C. That’s why Dennis Ritchie named his development as a C language which was the successor of B. WAIT! There is more to read… read on »
