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1.Describe a linear-time (in the size of the set of FDs, where the size of each FD is the number of attributes involved) algorithm for ?nding the attribute closure of a set of attributes with respect to a set of FDs. Prove that your algorithm correctly computes the attribute closure of the input attribute set.
Write a program to sort these back into a single file. Oh, and we only have a few nanoseconds to do it, so you'd better do it with pthreads!
What are the advantages of having the DBMS between the end user's applications and the database?
Carry out the following tasks below by using the correct SQL statements. Create the statements in Oracle by using the following steps (SQL > SQL commands > Enter Command). Determine the columns that make up the primary key of the l_lunch_items tabl..
Write a command to list all the employees hired in 2003 and 2004. Sort the rows by the hire_date column in descending order.
1.identify and discuss the serious data redundancy problems exhibited by the file structure shown in figure.2.looking
List all the business rules for the ABS ( Business rules are important because they define the conditions that the database must meet. For example, every Order must be associated with a valid Product.This prevents invalid Orders being entered into..
For each table argue whether or not interference with another transaction is possible. Illustrate concurrency control method using two phase locking.
If the "greater than" comparison operator is used with a multiple-row subquery, what type of result will be returned?
assume you were a newly hired it security manager at a software development company that in the past hasnt paid much
Suppose you are asked to evaluate a DBMS in terms of lock granularity and the different locking levels. Create a simple database environment in which these features would be important.
To apply and consolidate skills acquired in the requirement and analysis disciplines through analysis of a simple case study, and to express the results through the relevant UML diagrams. ITC203
Input names of students from user, terminated by ZZZ, and design the data file GRADES with records of form: student (string), test1 (integer), test2 (integer), test3 (integer).
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