Which of the following is a technique for optimizing the internal performance of the relational data model? (A) Clustering data B) Using random index organizations Not reporting statistics to save machine resources Avoiding indexes on secondary keys 1 Point
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- Investigate the concept of distributed data partitioning techniques, such as range partitioning and hash partitioning. How do these techniques impact data distribution and query performance?1) A database can have both Clustered and Unclustered Indexes for the same table? True False 2) Briefly define or describe a Clustered Index in 2-4 sentences. 3) Most Selective Access Path is a query optimization strategy which focuses on... A) Reducing the number of rows in query steps B) Ensuring there's an index for every query step C) Choosing which type of index works bestDiscuss the role of indexing in database systems. How do different types of indexes, such as B-trees and hash indexes, impact query performance?
- You are given the following database schema:Sailors(sid, sname, rating, age)Boats(bid, bname, color)Reserves(sid, bid, day)Consider the join on Sailors ▷◁ Reserves and assume that you have the following statistics andlimitations: * You have available 9 pages in main memory.* Sailors: 100000 tuples, 1000 pages; Boats: 2000 tuples, 10 pages; Reserves: 110000 tuples,550 pages 1. Calculate the I/O cost of sorting the Sailors relation?2. Calculate the I/O cost of sorting the Reserves relation?3. Calculate the total I/O cost of this join if we use Sort/Merge join?Explore the role of indexing in normalized databases. How can indexing strategies be optimized for efficient query processing in highly normalized datasets?Discuss the role of user-defined data types (UDTs) in database systems. How can UDTs be used to model and store complex data efficiently?
- Describe how the following informationabout railways, trains (for a particular day), and passengers would berepresented in a relational database:Trains: Rolar, Omni, and HolidayTrains for Rolar: R221, R567, and R234Holiday special Trains: H897 and H008Trains for Omni: O999 and O815John has reservations on R221 (seat 34U),R567 (seat 23U), and R234 (seat 43L).Henry has reservations on O999 (seat 15L) andH008 (seat 18L).Duke has reservations on H897 (seat 7U) andO815 (seat 2L).Discuss the challenges and considerations when working with complex datatypes, such as indexing and query optimization.Discuss the concept of data anomalies and how normalization helps prevent them in a relational database.
- In a distributed database, discuss the trade-offs between horizontal and vertical data fragmentation strategies. Provide examples for each.25)What does schema-on-write mode mean? • the schema is defined during the write process • during the write process, data does not need to conform to any schema • during the write process, data must conform to a pre-defined schema definition • the schema can be changed during the write process (26) Question 26 12 points) Which one of the V's of big data refers to the different forms of data that are generated? • velocity • variety • value • veracityDiscuss the concept of database indexing. How does indexing improve query performance, and what are the trade-offs associated with it?