Database management systems midterm solutions

Database software makes data management simpler by enabling users to store data in a structured form and then access it.
It typically has a graphical interface to help create and manage the data and, in some cases, users can construct their own databases by using database software.

An exam is uniquely identified by the combination of a course and a semester. Page 2. CS186 Midterm Solutions, Spring 2010. Page 2. • Every exam has at

Midterm Exam: Introduction to Database Systems: Solutions. 1. Entity Files and Buffer Management [10 points]. • [3 points] Consider a buffer pool

What is DBMS query optimization?

The choice of what system catalogs to maintain is left to the DBMS implementor

The goal of query optimization is to avoid the worst plans and ﬁnd a good plan

The goal is usually not to ﬁnd the optimal plan

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