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Explain forms based and graphical interface?
Forms based and graphical interface: graphical user interface (GUI) is a kind of user interface which permits people to interact along with electronic devices such as computers, hand-held devices (MP3 Players, Portable Media Players, and Gaming devices), household appliances and office equipment. A GUI offers graphical icons, and visual indicators as opposed to text-based interfaces, typed command labels or text navigation to completely represent the information and actions available to a user. The actions are commonly performed through direct manipulation of the graphical elements.
How to Insert data in your table from another table? insert into e.g, To insert tuples from employee into N_emp created above, use following statement Insert into N_emp
Section A: Use the following tables to create a database called College. Use SQL commands. Student stuid(primary) lastName firstName
In case of entity integrity, the primary key may be declared? In a case of entity integrity primary key may be not Null.
Isolation or Independence : The isolation property shows that the updates of a transaction should not be visible till they are committed. Isolation assurance that the progresses of
What is the disadvantage of a call by reference? During a call by reference damage or loss of data is not restricted to the subroutine, but will instantly lead to alters to th
Rules Of Data Normalisation Let us now summarise Normalisation with the help of various clean rules. The following are the necessary rules for the Normalisation process: 1.
What is known as a search key? An attribute or set of attributes used to look up records in a file is known as a search key.
What is a guard condition? Explain it with a suitable example. The guard-condition is a Boolean expression written with respect to parameters of triggering event and attributes
a need some real life examples of database management systems three level of ANSI SPARC architecture life teacher and student ,company and employee or for NGO etc.
What are three components of the schema architecture proposed by ANSI/SPARC? The three component schema architecture proposed by ANSI/SPARC is as given below: External sche
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