CS5481 Data Engineering Tutorial 12 1. (a) With immediate modification, modified buffer blocks can be written to the disk even if the transactions that made those modifications have not all committed. Is there any drawback if this is not allowed? • It may not work with transactions that perform a large number of updates, since […]
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Mobile Computing COMP5216 Week 03 Semester 2, 2020 Dr Kanchana Thilakarathna School of Computer Science The University of Sydney Page 1 Announcements – Change in Assignment 1 submission. The University of Sydney Page 2 Announcements – 15studentsstillhavenotregisteredforagroup. – Pleasetalktoyourtutortohelpyoufindagroup. – Thereare5groupswithlessthan5members. – Pleasetalktome! – Recalltheproposal: – Whatistheproblemthatyourappwillsolve? – Whydoestheproblemmatter(e.g.,motivationandsignificance)? – Whatistheappsolutiontotheproblem? – Howwillthesolutionbeimplemented(whichshouldbeclearforothersto implement)? –
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CS5481 Data Engineering Tutorial 2 Using relational operators, specify the following queries on the COMPANY relational database schema shown below. 1. Retrieve the name (Fname, Lname) and address (Address) of all employees who work for the ¡®Research¡¯ department. 2. List names (Fname, Lname) of all managers and the name of the departments (Dname) they manage,
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CS5481 Data Engineering Assignment 1 Deadline: 28‐SEP‐2020 (Monday), 3:00 pm (late submission will not be accepted) Points to note: ▪ Different books may have slightly different descriptions of concepts, algorithms and terminologies. To ensure fair assessment and uniformity in marking, you must follow the convention used in the lecture slides or our textbook (Database System
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3-16. ARTIFICIAL INTELLIGENCE 1. One way for writing Regular Expressions uses a single character as itself, uses the plus symbol (+) to indicate that there should be one or more instances of the preceding char- acter, and the zero symbol (0) to indicate that there should be zero or more instances of the preceding character.
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SYSIBM.SYSTABLES SYSIBM.SYSTABLES table Column name NAME CREATOR TYPE DBNAME TSNAME | | | Data type VARCHAR(18) NOT NULL CHAR(8) NOT NULL CHAR(1) NOT NULL CHAR(8) NOT NULL CHAR(8) NOT NULL SMALLINT NOT NULL SMALLINT NOT NULL SMALLINT NOT NULL CHAR(8) NOT NULL CHAR(8) NOT NULL CHAR(1) NOT NULL INTEGER NOT NULL INTEGER NOT NULL INTEGER
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Chapter 13: External Sorting Ed Knorr, Fall 2020 Based on: (a) Chapter 13 (pages 421-436), but skip Section 13.3.1 on “Minimizing the Number of Runs” on pages 428-430, and skip Section 13.4.2 on “Double Buffering” on page 432) of Ramakrishnan & Gehrke (textbook); (b) Garcia-Molina, Ullman, & Widom (reference text); (c) Some CPSC 221 Review
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CS5481 Data Engineering Assignment 2 Deadline: 23‐OCT‐2020 (Friday), 3:00pm (late submission will NOT be accepted) Points to note: ▪ Different books may have slightly different descriptions of concepts, estimation, algorithms and terminologies. To ensure fair assessment and uniformity in marking, you must follow the convention used in the lecture slides or our textbook (Database System
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CS5481 Data Engineering Tutorial 2 Using relational operators, specify the following queries on the COMPANY relational database schema shown below. 1. Retrieve the name (Fname, Lname) and address (Address) of all employees who work for the ‘Research’ department. 2. List names (Fname, Lname) of all managers and the name of the departments (Dname) they manage,
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Page 2 Q1. b Page 3 Q2(a): Sample Solutions to Midterm #2 # bytes in the key = 4 + 4 = 8 floor (4096 bytes/leaf page / (8 + 10) bytes/data entry ) = 227 DE/leaf page # of records is determined by: 200 mines * 10 years * 365.25 days/year = 730,500 records
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