reference: http://www.tutorialspoint.com/sql important: constrains: SQL constraints are used to specify rules for the data in a table. If there is any violation between the constraint and the data action‚ the action is aborted by the constraint. In SQL‚ we have the following constraints: NOT NULL - Indicates that a column cannot store NULL value UNIQUE - Ensures that each rows for a column must have a unique value PRIMARY KEY - A combination of a NOT NULL and UNIQUE. Ensures that
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Computer Networks Does anyone really know what networking is? “In the world of computers‚ networking is the practice of linking two or more computing devices together for the purpose of sharing data” (Networking Fundamentals). Now this is a great explanation but does this really help us understand? Networking has grown over many years. Where did networking come from? Lets go back to the beginning and find out how far we have come. Network research can be traced back to around the 1960’s.
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* Computer forensics lab usually conduct a digital forensic analysis * There are many type of computer forensics tool‚ some are free and some are licensed * Forensics lab usually are restricted to outsider What we don’t know * How computer forensics preserve their evidence * Overview of computer forensics lab * Cost to build a computer forensics lab What we need to know * Specific tool that use by computer forensics base on their case * How to build a computer forensics
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can lead to sedentary lifestyles‚ weight gain and a decline in physical fitness. Other symptoms can include carpal tunnel syndrome‚ dry eyes‚ migraine headaches‚ a decline in personal hygiene and back aches‚ according to Maressa Hecht‚ founder of Computer Addiction Services and a member of the Harvard Medical School. Depression has also been linked to Internet overuse by researchers at the Institute of Psychological Sciences in Leeds‚ UK. Researchers found that study participants who exhibited signs
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Metacognitive Skills Metacognition refers to learners’ automatic awareness of their own knowledge and their ability to understand‚ control‚ and manipulate their own cognitive processes.2 Metacognitive skills are important not only in school‚ but throughout life. For example‚ Mumford (1986) says that it is essential that an effective manager be a person who has learned to learn. He describes this person as one who knows the stages in the process of learning and understands his or her own preferred
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21 Basic Tools in Visual Basic 0.6 Control Description Pointer Provides a way to move and resize the controls form PictureBox Displays icons/bitmaps and metafiles. It displays text or acts as a visual container for other controls. TextBox Used to display message and enter text. Frame Serves as a visual and functional container for controls. CommandButton Used to carry out the specified action when the user chooses it. CheckBox Displays a True/False or Yes/No option. OptionButton
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What’s the difference between resistance and resistivity? Resistance is the obstruction offered to the flow of current by a conductor. Resistivity is the obstruction offered to the flow of current by UNIT AREA OF the conductor. So basically‚ resistance is the property of the object (say a copper wire)‚ whereas resistivity is the property of the substance (copper). And so resistance depends upon the properties of the object. Whereas resistivity depends upon the properties of the metal.
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softskills? Soft skill is the ability required and expected from persons for finding a suitable job‚ its maintenance and promotion. Softskills is an important facet of life. It is essential in all spheres of life. Be it an interview or dealing with the project leader or working out a solution with a team or writing a report‚ getting across the point effectively is what matters. The success of an endeavour hinges on the ability to communicate effectively in today’s fast paced life‚ everyone is asked
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PLS 21 Study online at quizlet.com/_9a303 1. 2 image categories Absolute Addressing Arithmetic Logic Unit (ALU) Autosum Basic Input/Output System (BIOS) Basic procedures of scripts Blender boot loader Rastor and Vector specific cell with specific data example: $A$1 carries out arithmetical and logical functions found in home and formula ribbon operates peripheral devices 25. 26. Hardcut Horizontal Application how many bits in a byte Hyper-threading Hypertext markup language Information
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Computers in Education The typical school has 1 computer per 20 students‚ a ratio that computer educators feel is still not high enough to affect classroom learning as much as books and classroom conversation. Some critics see computer education as merely the latest in a series of unsuccessful attempts to revolutionise education through the use of audio- and visually-oriented non print media. For example‚ motion pictures‚ broadcast television‚ filmstrips‚ audio recorders‚ and videotapes were all
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