how many rows does the resultant of the relational algebra expressionIdesc,acqcost (acqcost<1000 (4)) have, given the table A below?idacqcostdateacq4998.002019-09-152019-09-1582943 Conference Table77463 Conference Chair 247.4599821 Conference Chair 247.4544320 Desk2019-09-152298.002017-11-0599873 Conference Chair 247.452019-09-15247.452019-09-15247.002020-06-23874.002018-03-081389.00 2019-12-184877.902017-12-012017-11-052020-02-10desc77472 Conference Chair88872 Speaker Phone33411 Monitor 55"98006 Printer88753 Copier72633 Chair99098 Conference ChairAnswer:642.00239.90

Question- Here it will display desc and acqcost from table A that have acqcost less than 1000. So…

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how many rows does the resultant of the relational algebra expression desc,acqcost (acqcost<1000 (4)) have, given the table A below?

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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Question

how many rows does the resultant of the relational algebra expression
Idesc,acqcost (acqcost<1000 (4)) have, given the table A below?
id
acqcost
dateacq
4998.00
2019-09-15
2019-09-15
82943 Conference Table
77463 Conference Chair 247.45
99821 Conference Chair 247.45
44320 Desk
2019-09-15
2298.00
2017-11-05
99873 Conference Chair 247.45
2019-09-15
247.45
2019-09-15
247.00
2020-06-23
874.00
2018-03-08
1389.00 2019-12-18
4877.90
2017-12-01
2017-11-05
2020-02-10
desc
77472 Conference Chair
88872 Speaker Phone
33411 Monitor 55"
98006 Printer
88753 Copier
72633 Chair
99098 Conference Chair
Answer:
642.00
239.90

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