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Most computer systems authenticate users by asking them for the user name and password. However, the user names and passwords often can be guessed by hackers. Suggest an automated, preventive control mechanism to deal with the authentication problem.
Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
Evaluate, compare and contrast the two methods of relational database design namely top down method and Bottom up method. What will be your choice if you are asked to select a meth
What is an E-R model? Draw an E-R Diagram for the company database with following Descriptions? The company is organized within departments. Each department has a unique name a
When a function module is activated syntax checking is performed automatically. YEs, a function module is activated syntax checking.
Explain Recursive relationship type? Recursive relationship type: A recursive relationship is one in that the similar entity participates more than once in the relationship
Views in relational algebra: 1. Basic expression contains either a) A relation in the database. b) A constant relation. 2. General expressions are madde out of sma
1. Which model is used to store data in tree structures Ans: Hierarchical model is used to store data in tree structures
A database to track your progress in your college program will track your progress towards graduation! A database that has information containing the classes that you have taken, c
Draw an entity relationship diagram (ERD) for the following situation: A company has a number of employees. Each employee is identified by an Employee_Id. The company wants to st
how to implement hyrise in C plus plus
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