Question: Question 1: a) Discuss the major challenges for Parallel Query Optimization b) Consider the following SQL query: SELECT ENAME, DUR FROM EMP, ASG, PROJ WHERE

Question 1: a) Discuss the major challenges for Parallel Query Optimization

Question 1: a) Discuss the major challenges for Parallel Query Optimization b) Consider the following SQL query: SELECT ENAME, DUR FROM EMP, ASG, PROJ WHERE EMP.ENO = ASG.ENO AND ASG.PNO = PROJ.PNO AND RESP="Manager" AND PNAME="Instrumentation" i) Give four possible operator trees: right-deep, left-deep, zigzag, and bushy. ii) For each one, discuss the opportunities for parallelism

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