c) Write a query to display the patron ID and the average number of days that patron keeps books duringa checkout. Limit the results to only patrons who have at least three checkouts. Sort the results indescending order by the average days the book is kept.Sample Output:-Average days kept by PatronPAT_ID Average Days Kept1160711856.6711655.6712075.512095.3311724.511834.3311813.6711713.6711613.3312102.3312292 ERD:-PKCHECKOUTCheck NumFK1 Book_NumFK2 Pat_IDCheck Out DateCheck_Due DateCheck_In_DatePKBOOKBook NumBook TitleBook_YearBook_CostBook_SubjectFK1 Pat_ID-H-PATRONPK Pat IDPat_FNamePat_LNamePat_TypeWRITESPK,FK1 Book NumPK,FK2 Au IDAUTHORPK AU IDAu_FNameAu_LNameAu_BirthYear

Algorithm:Select Data: Start by selecting the necessary data from the PATRON and CHECKOUT…

c) Write a query to display the patron ID and the average number of days that patron keeps books during a checkout. Limit the results to only patrons who have at least three checkouts. Sort the results in descending order by the average days the book is kept. Sample Output:-Average days kept by Patron PAT_ID Average Days Kept 7 6.67 5.67 5.5 5.33 4.5 1160 1185 1165 1207 1209 1172 1183 1181 1171 1161 1210 1229 4.33 3.67 3.67 3.33 2.33 2

c) Write a query to display the patron ID and the average number of days that patron keeps books during a checkout. Limit the results to only patrons who have at least three checkouts. Sort the results in descending order by the average days the book is kept. Sample Output:-Average days kept by Patron PAT_ID Average Days Kept 7 6.67 5.67 5.5 5.33 4.5 1160 1185 1165 1207 1209 1172 1183 1181 1171 1161 1210 1229 4.33 3.67 3.67 3.33 2.33 2

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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