DATABASE SYSTEM CONCEPTS LCPO
DATABASE SYSTEM CONCEPTS LCPO
7th Edition
ISBN: 9781265586577
Author: SILBERSCHATZ
Publisher: MCG
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Chapter 5, Problem 24E

Explanation of Solution

Given relation “r”:

The given relation “r” is shown in the below table,

buildingroom_numbertime_slot_idcourse_idsec_id
Garfield359ABIO-1011
Garfield359BBIO-1012
Saucon651ACS-1012
Saucon550CCS-3191
Painter705DMU-1991
Painter403DFIN-2011

Given query:

The given query is,

select building, room_number, time_slot_id, count(*)

from r

group by rollup (building, room_number, time_slot_id)

Result:

The result of the given query is,

buildingroom_numbertime_slot_idcount(*)
Garfield359A1
Garfield359B1
Garfield359

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Chapter 5 Solutions

DATABASE SYSTEM CONCEPTS LCPO

Ch. 5 - Prob. 1PECh. 5 - Prob. 2PECh. 5 - Prob. 4PECh. 5 - Prob. 5PECh. 5 - Consider the bank database of Figure 5.21. Let us...Ch. 5 - Prob. 7PECh. 5 - Prob. 8PECh. 5 - Prob. 9PECh. 5 - Using the relation from Exercise 5.9, write an...Ch. 5 - Show how to express group by cube(a, b, c, d)...
Ch. 5 - Prob. 13ECh. 5 - Prob. 14ECh. 5 - Prob. 15ECh. 5 - Prob. 16ECh. 5 - Prob. 19ECh. 5 - Prob. 20ECh. 5 - Prob. 21ECh. 5 - Prob. 22ECh. 5 - Prob. 23ECh. 5 - Prob. 24E
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