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Explain the use of the SQL BEGIN TRANSACTION, COMMIT TRANSACTION, and ROLLBACK TRANSACTION statements. Why does MySQL also use the SQL START TRANSACTION statement?
Write a 500-1000 word paper using Word discussing two of the additional DBA responsibilities. Use at least two sources outside your text for this paper. Do not use Wikipedia. Use APA format for the paper, and be sure to cite all your sources using AP..
a. Show that every serial execution involving these two transactions preserves the consistency of the database. b. Show a concurrent execution of T13 and T14 that produces a non-serializable schedule. c. Is there a concurrent execution of T13 and T14..
Why were the sections of the Communications Decency Act (CDA) designed to protect children from concerns about Internet pornography so controversial?
Develop a simple website. Show the home page of the Web site that the visitors can use to visit the site and about 5 more pages plus some figures. Also show the site map at two level of depth (i.e., what pages will be invoked from first page, etc). ..
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The bandwidth is infinite, and during the first RTT we can send one packet (21-1 ), during the second RTT we can send two packets (22-1 ), during the third we can send four (23-1 ), and so on. (A justification for such an exponential increase will..
Try to determine which sets of attributes form keys of R. How would you normalize this relation?
Let L1, L2, ..., Ln be distinct lines in the Euclidean plane, and let A be the set of points formed by intersections of these lines. Characterize A using set notation and quantifiers.
Use the Internet or the Strayer Library to research one (1) concept in information systems that you have studied in this course. You may select a topic of your choice or you may use one (1) of the following:
Evaluate the megatrend of demographics in the IT field. Give your opinion as to why IT managers must understand this megatrend when selecting talent for organizational positions.
Imagine that you are on a team that has been tasked with creating an online course delivery system. One of your coworkers wants to model the entire course in UML. Another coworker disagrees with the use of UML and would rather use pseudocode exclu..
The shaft is subjected to an axial force P. If the reactive pressure on the conical bearing is uniform, determine the torque M that is just sufficient to rotate the shaft. The coefficient of static friction at the contacting surface is µs
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