Computer graphics-Raster Scan Systems
Here we learn about some of the concepts of Computer Graphics : Raster Scan Systems Video Controller Some of operations can be performed by the Video Controller: Refreshing operation Transformation (Areas of the screen can be enlarged, reduces, or moved during the refresh cycles) Random Scan Systems
yash sharma
Computer Graphics-Motion Capture
Here we learn about some of the concepts of Computer Graphics : Input Devices Motion Capture Head Mounted Display Image scanner Digital camera
Computer Graphics-Scan Converting A Line
Here we learn about some of the concepts of Computer Graphics : Scan Converting A Line Digital Differential Analyzer Scan Converting A Line On raster system, lines are plotted with pixels, and step size (horizontal & vertical direction) are constrained by pixel separation. DDA Algorithm
PHP: The Basics
Here we get to know about the basic concepts of PHP like: PHP: The Basics What is it? What can it do? Fundamentals Preparing to code with PHP and many more...
JavaScript Statements
JavaScript Statements Example var x, y, z; // Statement 1 x = 5; // Statement 2 y = 6; // Statement 3 z = x + y; // Statement 4 Try it Yourself » ________________________________________ JavaScript Programs A computer program is a list of "instructions" to be "executed" by a computer. In a programming language, these programming instructions are called statements. A JavaScript program is a list of programming statements. In HTML, JavaScript programs are executed by the web browser.
JavaScript Where To
JavaScript Where To The Tag In HTML, JavaScript code must be inserted between and tags. Example document.getElementById("demo").innerHTML = "My First JavaScript"; Try it Yourself » Old JavaScript examples may use a type attribute: . The type attribute is not required. JavaScript is the default scripting language in HTML.
What is a Stored Procedure?
What is a Stored Procedure? A stored procedure is a prepared SQL code that you can save, so the code can be reused over and over again. So if you have an SQL query that you write over and over again, save it as a stored procedure, and then just call it to execute it. You can also pass parameters to a stored procedure, so that the stored procedure can act based on the parameter value(s) that is passed.
The SQL WHERE Clause
The SQL WHERE Clause The WHERE clause is used to filter records. The WHERE clause is used to extract only those records that fulfill a specified condition. WHERE Syntax SELECT column1, column2, ... FROM table_name WHERE condition;
What is a NULL Value?
What is a NULL Value? A field with a NULL value is a field with no value. If a field in a table is optional, it is possible to insert a new record or update a record without adding a value to this field. Then, the field will be saved with a NULL value. Note: A NULL value is different from a zero value or a field that contains spaces. A field with a NULL value is one that has been left blank during record creation! ________________________________________ How to Test for NULL Values? It is not possible to test for NULL values with comparison operators, such as =,
The SQL DELETE Statement
The SQL DELETE Statement The DELETE statement is used to delete existing records in a table. DELETE Syntax DELETE FROM table_name WHERE condition; Note: Be careful when deleting records in a table! Notice the WHERE clause in the DELETE statement. The WHERE clause specifies which record(s) should be deleted. If you omit the WHERE clause, all records in the table will be deleted!
The SQL COUNT(), AVG() and SUM() Functions
The SQL COUNT(), AVG() and SUM() Functions The COUNT() function returns the number of rows that matches a specified criteria. The AVG() function returns the average value of a numeric column. The SUM() function returns the total sum of a numeric column.
The SQL CREATE TABLE Statement
The SQL CREATE TABLE Statement The CREATE TABLE statement is used to create a new table in a database. Syntax CREATE TABLE table_name ( column1 datatype, column2 datatype, column3 datatype, .... ); The column parameters specify the names of the columns of the table. The datatype parameter specifies the type of data the column can hold (e.g. varchar, integer, date, etc.). Tip: For an overview of the available data types, go to our complete Data Types Reference.