Consider the following table Xbox_Games(name, price) and assume that these values already exist in the database ('ok_game', 40), ('good_game', 50), ('AWESOME_game', 60). We have the following two transactions: T1: BEGIN TRANSACTION S1: UPDATE Xbox_Games SET price=22 WHERE name =' ok_game' S2: INSERT INTO Xbox_Games VALUES ('Another_Game', 0) S3: UPDATE Xbox_Games SET price=38 WHERE name =' ok_game' COMMIT T2: BEGIN TRANSACTION sS: SELECT AVG{price} AS average_price FROM Xbox_Games COMMIT; Above two transactions are hitting the DBMS ro
Consider the following table Xbox_Games(name, price) and assume that these values already exist in the database ('ok_game', 40), ('good_game', 50), ('AWESOME_game', 60). We have the following two transactions: T1: BEGIN TRANSACTION S1: UPDATE Xbox_Games SET price=22 WHERE name =' ok_game' S2: INSERT INTO Xbox_Games VALUES ('Another_Game', 0) S3: UPDATE Xbox_Games SET price=38 WHERE name =' ok_game' COMMIT T2: BEGIN TRANSACTION sS: SELECT AVG{price} AS average_price FROM Xbox_Games COMMIT; Above two transactions are hitting the DBMS ro
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
Consider the following table Xbox_Games(name, price) and assume that these values already exist in the
T1: BEGIN TRANSACTION
S1: UPDATE Xbox_Games SET price=22 WHERE name =' ok_game'
S2: INSERT INTO Xbox_Games VALUES ('Another_Game', 0)
S3: UPDATE Xbox_Games SET price=38 WHERE name =' ok_game'
COMMIT
T2: BEGIN TRANSACTION
sS: SELECT AVG{price} AS average_price FROM Xbox_Games
COMMIT;
Above two transactions are hitting the DBMS roughly at the same time. What are the possible values for average_prices?
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