Q3: Consider the following relation and by inspecting the types of dependencies, remove any redundanta inconsistent data. O_id O_date Cust_i Cust_na Cust_state Pro_id Pro_desc d 2001 10/12/20 4 Newyork 3,5,6 2002 10/11/20 S Ali Ahmed Chicago 2,4 Mouse, keyboard, Monitor Motherboard, DVD drive Pro_price Pro_quantit 2000, 1000, 2500 2800, 1500 y 2,1,5 3,4

Q3: Consider the following relation and by inspecting the types of dependencies, remove any redundanta inconsistent data. O_id O_date Cust_i Cust_na Cust_state Pro_id Pro_desc d 2001 10/12/20 4 Newyork 3,5,6 2002 10/11/20 S Ali Ahmed Chicago 2,4 Mouse, keyboard, Monitor Motherboard, DVD drive Pro_price Pro_quantit 2000, 1000, 2500 2800, 1500 y 2,1,5 3,4

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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q20
Consider the following Course table from course management system. Course_name Data Structures Database Discrete Mathematics Programming principles Course_number CS1202 CXB3100 MAT1201 PRG 1102 Table 1 Credit_hours Department DCIS DCIS Maths 4 3 3 4 DCIS Write a trigger that fires when a row is deleted from the above Course table (Table 1). The trigger records in a temporary table, called Removed Courses with the following information: the removed course name, the course number, and the date the course was deleted.
q8- Choose ALL that apply.
Let's assume that the following indices are now set on the schema from the previous task: - Level 2 B+ index on the attribute Vehicle.year - Hash index on the attribute Rental.date Our DBMS has the following algorithms to perform the join: - Block nested loops join - Index nested loops join Translate the following SQL query into relational algebra and find the plan that reads the fewest pages or blocks: SELECT Vehicle.brand, Vehicle.model FROM Vehicle JOIN Rental ON (Vehicle.vid = Rental.vid) WHERE Vehicle.year = 2015 AND Rental.date > ’31.12.2022’
The following three tables make up a simple reservation system for a small campground. The database should allow for a camper to make multiple reservations for future dates and for a camping spot to have several reservations for upcoming visits. Table: Camper CAMPER_NUMBER 1000 1001 1002 1003 CAMPER_LAST_NAME Jones Schmidt Williams Cooper CAMPER_FIRST_NAME Jamie Pat Clifford Amanda CAMPER_ADDRESS 1278 Essex Pl 4954 Spangled Way 956 Segull Lane P. O. Box 998877 CAMPER_CITY Birmingham El Paso Portland Portsmouth CAMPER_STATE AL TX ME OH CAMPER_ZIP_CODE 45251 79919 4108 45662 CAMPER_DRIVERS_LICENSE JJ998743-98 87632434 WIL885123 765A876B897 CAMPER_EMAIL jjones@somewhere.com patwonderfu34l@nowhere.net williams98342@foomail.com coopera@nowhere.net Table: Spot SPOT_NUMBER 101 102 103 104 SPOT_NAME The Pines The Glade Teardrop Spot Tent In Trees…
be Used in PL/SQL triggers. OA INSERT OB. DELETE OC. ALTER OD. UPDATE QUESTION 6 The inheritance enables the subtypes entities to inherit-- OA Attributes only OB. nothing OC. Relationships only OD. Relationships and attributes QUESTION 7 Consider the syntax given below. The optional [for each row] clause specifies CREATE OR REPLACE TRIGGER trigger_name [BEFORE / AFTER] [DELETE / INSERT / UPDATE OF column_name] ON table_name
Keeping the join as a materialized view may be handy if a parallel data store is utilized to hold two relations r and s and we need to connect them. In terms of total throughput, space use, and response time to user requests, what are the advantages and costs of this approach?
3. What is the result of the following query? 2select name, dept_namefrom Instructorwhere name like ‘%in%’
q20- Choose ALL that apply.
Create a version of the hybrid merge-join method that is appropriate for the situation in which both relations are not physically sorted, but both have a sorted secondary index on the attributes that are being joined.
Using the World database, two updates are needed for one row in the City table. The city of Giumri in Armenia (country code ‘ARM’) is spelled incorrectly in the table. It should be spelled ‘Gyumri’. Also, the district is currently ‘irak’ in the table and should be ‘Irak’. Make these changes in one construct.
Generate the candidate item set and frequent item set by taking any data set, follow the given conditionas database size |D|= 4 and minimum support = 2