Little Programming languages

SQL(Structured Query Language)  is a database computer programming language designed for the retrieval and management of data in relational database. IBM first developed of SQL in 1970s. Also it is an ANSI/ISO standard. It has become a standard universal language used mostly in relational database management system(RDBMS). In a simple manner, SQL is a non-procedural, English-like language that processes data in groups of records rather than one record at a time. Few functions of SQL are:

• store data
• modify data
• retrieve data
• modify data
• delete data
• create tables and other database objects
• delete data

Tcsh is a scripting language and it is compatible with the Csh or C-shell scripting language. Tcsh scriptting language is written in C and it runs on the cross-patforms. The benefit of the Tcsh is it have a feature of the history it save the commands you written before so you can use that commands again without typing. It have command line editing so it is easy to use. It provide the feature of the auto completion of the file names and commands at the command line. To create the tcsh script you have to enter the pre-defined line in the first line of the script #!/bin/tcsh . The first line show that which scripting language is using to create a script.

The C shell is a command processor which allows user to type commands. The c shall can read the commands from the file known as scripts. C shell consist of the control structure, shell command, expressions and variables. The first line of the script shows the language in which the script is written in Csh scripting the first line should be #!/bin/csh . The script file should be given execute permission with chmod command

Ksh scripting language is also known as a Korn unix shell scripting language. Korn shell is a powerfull high level language programming language used to writing applications and this is easy and quick than the other high-level languages. The code size of the Ksh scripting language is larger than the other scripting languages. The first line of the Korn scripting is #!/bin/ksh . Ksh scripting language provide many features of Object oriented languages e.g conditions, itterations, variables, exceptions

Bash is a shell programming language which means writing a code that shell executes. The Bash is a most common Linux shell. The name of the Bash comes from the “Bourne Again Shell”. There are many shell programming languages but people want to stick to Bash because it provide the platform interdependency and flexibility to the program. The features of the Bash programming keeps on enhance with time as some modern features add to shell e.g allows you to open more than one shall at a time and colored directory listing

TCL stands for Tool Command Language Tcl is a scripting language and extending programming language. It is used for rapid prototyping, scripted application. It is used on enbeded systems platforms. Tcl can work on Windows, Linux, Mac OS X, as well as other platforms. It is an Open Source Programming language. The combination of TCL and Tcl GUI is called Tcl/Tk.