SQL
SQL Keywords
Currently Used SQL Keywords NB : SQL Keywords can be used as Identifiers in our query by putting them inside big bracket such as [ADD], [PERCENT], [ALL] etc. ADD EXCEPT PERCENT ALL EXEC PLAN ALTER EXECUTE PRECISION Read more…
Php Theory
Date and Time Code Examples in Php
Example: Php code to display current Day. Example: Php code to display the different date formats. Example : Source codes to display the different Time & Calendar in Php. Example : Php code to check whether the current year is Leap year or not. Example : Different format of Date Read more…
Php Theory
Super Global Variables in Php
Introduction The concept of Super global variables was introduced in/after PHP 4.1.0. The superglobal variables are also known as Global Variables/Automatic Globals. Definition Super global variables are pre-defined, built-in variables & are of global scopes and hence always accessible from any function, class, file, etc. Features These variables can be used Read more…
Php Theory
Array & String in Php(Examples)
Array Example : How the contents of the Index Array are Displayed in Php? Example : How are the contents of an Array Count in Php? Example : How the contents of an Array are Sort in Ascending Order in Php? Example : How the contents of an Array are Sort in Read more…
Php Theory
Control Statement in Php (Examples)
Example : How to use the if control statement in Php? Example : How to use an if-else control statement in Php? Example : How to use nested if-else control statement in Php? Example : How to use if-else if — else control statement in Php? Example : How to Read more…
Computer Network
Application Layer
Introduction It is the top and most advanced layer of the OSI model. This is the 7th layer of the OSI model. This is the higher layer of the OSI model. Features This layer defines the language and syntax that programs use to communicate with other programs. This layer represents Read more…
Computer Network
Presentation Layer
Introduction This is the 6th layer of the OSI model. This is the Upper layer of the OSI model. This layer lies in between the Session layer and the Application layer. Features In a computer network, different computers have different codes for representing character strings (e.g., ASCII, EBCDIC, Unicode, etc), Read more…
Computer Network
Session Layer
Introduction The session layer is the 5th layer of the OSI model. This layer lies in between the Transport layer and the Presentation layer. Features The session layer controls and coordinates the dialogues or data-exchange process between senders’ and receivers’ computers during communication in an orderly manner. This layer is Read more…
Computer Network
Transport Layer
Introduction The transport layer is the 4th layer of the OSI model. This layer lies in between the Network layer and the Session layer. Features This layer acts as an interface between the bottom and top three layers. The lower data link layer (layer 2) is only responsible for delivering Read more…
Computer Network
Network Layer
Introduction of OSI Network Layer The network layer is the 3rd layer of the OSI model from the bottom side(Physical Layer). This layer lies in between the Data link layer and the Transport layer. Characteristics of OSI Network Layer The unit of data at the network layer is popularly called Data Read more…