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mds:dsd:start [10/11/2022 alle 15:35 (17 mesi fa)]
Salvatore Ruggieri
mds:dsd:start [27/03/2024 alle 13:18 (39 ore fa)] (versione attuale)
Salvatore Ruggieri [Exams]
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-====== Decision Support Systems - Module I (6 ECTS): Decision Support Databases A.Y. 2022/23 ======+====== Decision Support Systems - Module I (6 ECTS): Decision Support Databases A.Y. 2023/24 ======
  
 This is the first module of [[mds:dss:start|Decision Support Systems]] (801AA, 12 ECTS), previously called [[mds:dsd:2021|Decision Support Databases]] (662AA, 6 ECTS).  This is the first module of [[mds:dss:start|Decision Support Systems]] (801AA, 12 ECTS), previously called [[mds:dsd:2021|Decision Support Databases]] (662AA, 6 ECTS). 
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     * [[http://pages.di.unipi.it/ruggieri/]]     * [[http://pages.di.unipi.it/ruggieri/]]
     * [[salvatore.ruggieri@unipi.it]]       * [[salvatore.ruggieri@unipi.it]]  
-    * **Office hours:** Wednesdays h 14:00 - 16:00 or by appointment, at the Department of Computer Science, room 321/DO, or via Teams.+    * **Office hours:** Tuesdays h 14:00 - 16:00 or by appointment, at the Department of Computer Science, room 321/DO, or via Teams.
  
  
-=====Classes=====+=====Hours and rooms=====
  
 ^  Day of Week  ^  Hour  ^  Room  ^  ^  Day of Week  ^  Hour  ^  Room  ^ 
-|  Wednesday  |  11:00 - 13:00  |  Fib C1  | +|  Wednesday  |  11:00 - 13:00  |  Fib L1  | 
-|  Thursday  |  14:00 - 16:00  |  Fib M1  |+|  Thursday  |  14:00 - 16:00  |  Fib L1  |
  
  
 +A [[https://teams.microsoft.com/l/channel/19%3a16c4847872b34df2bfe2e0097597c330%40thread.tacv2/Module%2520I%2520-%2520Decision%2520Support%2520Databases?groupId=6bc87f32-e2c1-46b8-9c9f-928cae8bbe4d&tenantId=c7456b31-a220-47f5-be52-473828670aa1|Teams channel]] is used ONLY to post news, Q&A, and other stuff related to the course. The lectures will be only in presence and will **NOT** be live-streamed, but recordings of the lecture or of the previous years will be made available here for non-attending students. 
 =====Mandatory teaching material ===== =====Mandatory teaching material =====
  
-  * **[DW]** A. Albano, S. Ruggieri. [[http://fondamentidibasididati.it/wp-content/uploads/2020/11/DWessential-2021-C3-12-21.pdf|Decision Support Databases Essentials]], University of Pisa, December 2021+  * **[DW]** A. Albano, S. Ruggieri. [[http://fondamentidibasididati.it/wp-content/uploads/2020/11/DWessential-2023-C21-12-23.pdf|Decision Support Databases Essentials]], University of Pisa, 21 December 2023
   * **[DB]** A. Albano. [[http://fondamentidibasididati.it/wp-content/uploads/2020/11/DBEssential-2021-C30-11-21.pdf|DB Essentials]] and [[http://fondamentidibasididati.it/wp-content/uploads/2020/11/DBEssential-2020-Soluzioni-C30-11-21.pdf|solutions to exercises]], University of Pisa, 1 December 2020. This is a self-contained excerpt (in English) from the book [[http://fondamentidibasididati.it|Fondamenti di basi di dati]] (in Italian, free download).   * **[DB]** A. Albano. [[http://fondamentidibasididati.it/wp-content/uploads/2020/11/DBEssential-2021-C30-11-21.pdf|DB Essentials]] and [[http://fondamentidibasididati.it/wp-content/uploads/2020/11/DBEssential-2020-Soluzioni-C30-11-21.pdf|solutions to exercises]], University of Pisa, 1 December 2020. This is a self-contained excerpt (in English) from the book [[http://fondamentidibasididati.it|Fondamenti di basi di dati]] (in Italian, free download).
-  * Examples of [[http://patterns.di.unipi.it/dsd/DSDsamples.pdf|written exams with solutions]] and [[http://patterns.di.unipi.it/dsd/dsd2020sample.pdf|written exam]].+  * Examples of {{ :mds:dsd:dsdsamples.pdf | written exams with solutions}} and [[http://131.114.72.230/dsd/dsd2020sample.pdf|written exam]].
 =====Software===== =====Software=====
  
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 =====Preliminary program and calendar===== =====Preliminary program and calendar=====
  
-  * [[https://esami.unipi.it/programma.php?c=57058&aa=2022|Preliminary program]]. +  * [[https://esami.unipi.it/programma.php?c=61299&aa=2023|Preliminary program]]. 
-  * [[https://didattica.di.unipi.it/en/master-programme-in-data-science-and-business-informatics/academic-calendar-2022-2023/|Calendar of lessons]].+  * [[https://didattica.di.unipi.it/en/master-programme-in-data-science-and-business-informatics/academic-calendar-2023-2024/|Calendar of lessons]].
  
  
 =====Exams===== =====Exams=====
  
-__//There are no mid-terms//.__ The exam of Decision Support Systems (801AA, 12 ECTS) consists of a written part and an oral part on the topics of the first module (50% of the final grade), and a lab project with discussion on the topics of the second module (50% of the final grade). The written part consists of open questions, small exercises, and a Data Warehouse design problem. Each question is assigned a grade, summing up to 30 points. Students are admitted to the oral part if they receive a grade of at least 18 points. Oral consists of critical discussion of the written part and of open questions and problem solving on the topics of the course. See [[mds:lbi:start|Module II: Laboratory of Data Science]] for the lab project.+__//There are no mid-terms//.__ The exam of Decision Support Systems (801AA, 12 ECTS) consists of a written part and an oral part on the topics of the first module (50% of the final grade), and a lab project with discussion on the topics of the second module (50% of the final grade). The written part consists of open questions, small exercises, and a Data Warehouse design problem. Each question is assigned a grade, summing up to 30 points. Students are admitted to the oral part if they receive a grade of at least 18 points. Oral consists of critical discussion of the written part and of open questions and problem solving on the topics of the course. See [[mds:lbi:start|Module II: Laboratory of Data Science]] for the lab project. Module I and Module II must be passed at maximum distance of one year between them (they can be taken in any order).
  
-Registration to the written exam is mandatory (**look at the deadline for registering!**): [[https://esami.unipi.it/esami2/|register here]]\\+Registration to the written exam is mandatory (**pay attention at the deadline for registering!**): [[https://esami.unipi.it/esami2/|register here]]\\ 
 + 
 +**Please indicate in the notes "Only Lab" for doing only the discussion of the lab project; "Only DSD" for doing only the written+oral part of the DSD module; or "DSD+Lab" for doing both. The date reported below is for the DSD written exam. The actual date of the discussion of the lab project will be communicated to you by email.**
  
 ^  Date  ^  Hour  ^  Room  ^  Notes  ^ ^  Date  ^  Hour  ^  Room  ^  Notes  ^
-|  11/01/2023  |  16:00 - 18:00  | TBA    +|  28/5/2024  |  9:00 - 11:00  |  TBD  |    | 
-|  01/02/2023  |  16:00 - 18:00  | TBA    |+|  25/6/2024  |  9:00 - 11:00  |  TBD     
 +|  23/7/2024  |  9:00 - 11:00  |  TBD  |    | 
 +|  13/9/2024  |  11:00 - 13:00  |  TBD     |
  
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-<!-- +<!-- [[https://didattica.di.unipi.it/en/appelli-straordinari/|Extra-ordinary exam]] -->
-|  10/09/2021  |  14:00 - 16:00  |  Online |  **Written exam ONLINE only!** +
-|  27/11/2020  |  14:00 - 16:00  |  Online exam  | [[https://didattica.di.unipi.it/en/appelli-straordinari/|Extra-ordinary exam]] +
--->+
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- 
-=====Teams channel ===== 
- 
-A [[https://teams.microsoft.com/l/team/19%3aE3in1CcEGzs_W-8NNuQbNkuua_UaPIAzamLvzVNswdw1%40thread.tacv2/conversations?groupId=279299f3-aa07-48b1-8ec6-b2fd1a6d125d&tenantId=c7456b31-a220-47f5-be52-473828670aa1|Teams channel]] will be used to post news, Q&A, and other stuff related to the course. 
  
 =====Class calendar ===== =====Class calendar =====
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 Lessons will be **NOT** be live-streamed, but recordings of past years are available here for non-attending students.\\ Lessons will be **NOT** be live-streamed, but recordings of past years are available here for non-attending students.\\
  
-Recordings and teaching material are **password protected**. Ask the teacher for credentials.\\+Some of recordings and teaching material are **password protected**. Ask the teacher for credentials.\\
  
 To watch the recordings online, you must be connected to the [[https://start.unipi.it/en/help-ict/vpn/|unipi.it VPN]]. Alternatively, right click on the link and download the whole file, then watch it locally on your device using e.g. [[http://www.videolan.org/vlc/|VLC media player]]. To watch the recordings online, you must be connected to the [[https://start.unipi.it/en/help-ict/vpn/|unipi.it VPN]]. Alternatively, right click on the link and download the whole file, then watch it locally on your device using e.g. [[http://www.videolan.org/vlc/|VLC media player]].
  
-**2022-01.** //Thursday 15 September 202214-16// **[DW: 1.1-1.2]**  [[http://patterns.di.unipi.it/dsd/video/dsd01_20220915.mp4|rec01 audio-video (.mp4) current year]]+**2023-01.** //Wednesday 20 September 202311-13// **[DW: 1.1-1.2]** [[http://131.114.72.230/dsd/video/dsd01_20220915.mp4|rec01 audio-video (.mp4) past years]]
  
 Course overview. Need for Strategic Information. Information Systems in Organizations: Operational and Decision support. Data driven Decision support systems and Business Intelligence applications. From data to information for decision making. Types of data synthesis: Reports, Multidimensional data analysis, Exploratory data analysis. Course overview. Need for Strategic Information. Information Systems in Organizations: Operational and Decision support. Data driven Decision support systems and Business Intelligence applications. From data to information for decision making. Types of data synthesis: Reports, Multidimensional data analysis, Exploratory data analysis.
  
-**2022-02.** //Wednesday 21 September 202211-13// **[DW: 1.3-1.7]**  [[http://patterns.di.unipi.it/dsd/video/dsd02_20180919.flv|rec02 audio-video (.flv) past years]]+**2023-02.** //Thursday 21 September 202314-16// **[DW: 1.3-1.7]**  [[http://131.114.72.230/dsd/video/dsd02_20180919.flv|rec02 audio-video (.flv) past years]]
  
 The data warehouse (DW) and DW architectures. What to model in a DW: Facts, measures, dimensions and dimensional hierarchies. Examples of data analysis. Exercises on data analysis in SQL. The data warehouse (DW) and DW architectures. What to model in a DW: Facts, measures, dimensions and dimensional hierarchies. Examples of data analysis. Exercises on data analysis in SQL.
  
-**2022-03.** //Thursday 22 September 202214-16// **[DB: 1.1, 2.1-2.5]** [[http://patterns.di.unipi.it/dsd/video/dsd03_20210921.mp4|rec03 audio-video (.mp4) past years]]+**2023-03.** //Wednesday 27 September 202311-13// **[DB: 1.1, 2.1-2.5]** [[http://131.114.72.230/dsd/video/dsd03_20210921.mp4|rec03 audio-video (.mp4) past years]]
  
-Recalls: the Object Data Model. [[http://patterns.di.unipi.it/dsd/dsd.03.assignments.pdf|Exercises at home (Assignments I and II) for the lesson 2022-05]].+Recalls: the Object Data Model. [[http://131.114.72.230/dsd/dsd.03.assignments.pdf|Exercises at home (Assignments I and II) for the lesson 2023-05]].
  
-**2022-04.** //Wednesday 28 September 202211-13// **[DW: 2.1]**  [[http://patterns.di.unipi.it/dsd/video/dsd04_20170929.flv|rec04 audio-video (.flv) past years]]+**2023-04.** //Thursday 28 September 202314-16// **[DW: 2.1]**  [[http://131.114.72.230/dsd/video/dsd04_20170929.flv|rec04 audio-video (.flv) past years]]
  
 DW modeling. A conceptual multidimensional data model. Representation of Fact, measures, dimensions, attributes and dimensional hierarchies. Key steps in conceptual design from business questions. How to identify fact types and fact granularity and measure types. How to identify dimensions, dimensional attributes and hierarchies. Examples. DW modeling. A conceptual multidimensional data model. Representation of Fact, measures, dimensions, attributes and dimensional hierarchies. Key steps in conceptual design from business questions. How to identify fact types and fact granularity and measure types. How to identify dimensions, dimensional attributes and hierarchies. Examples.
-[[http://patterns.di.unipi.it/dsd/dsd.04.assignments.pdf|Exercises at home (University exams) for the lesson 2022-05]].+[[http://131.114.72.230/dsd/dsd.04.assignments.pdf|Exercises at home (University exams) for the lesson 2023-05]].
  
-**2022-05.** //Thursday 29 September 2022, 14-16// **[DW: 2.1, A.1]**  [[http://patterns.di.unipi.it/dsd/video/dsd05_20210928.mp4|rec05 audio-video (.mp4) past years]] 
  
-The example of a data model for Master program examsPresentation and discussion of the Hospital case study.  [[http://patterns.di.unipi.it/dsd/dsd.05.assignments.pdf|Exercises at home (Assignment IIIfor the lesson 2022-07]].+**2023-05.** //Wednesday 4 October 2023, 11-13// **[DW: 2.1, A.1]**  [[http://131.114.72.230/dsd/video/dsd05_20210928.mp4|rec05 audio-video (.mp4past years]]
  
-**2022-06.** //Wednesday 5 October 202211-13// **[DB: 3.1-3.2]**  [[http://patterns.di.unipi.it/dsd/video/dsd06_20211001.mp4|rec06 audio-video (.mp4) past years]]+The example of a data model for Master program exams. Presentation and discussion of the Hospital case study.  [[http://131.114.72.230/dsd/dsd.05.assignments.pdf|Exercises at home (Assignment III) for the lesson 2023-07]]. 
 + 
 +**2023-06.** //Thursday 5 October 202314-16// **[DB: 3.1-3.2]**  [[http://131.114.72.230/dsd/video/dsd06_20211001.mp4|rec06 audio-video (.mp4) past years]]
  
 Recalls: the relational model and relational algebra. Exercises.  Recalls: the relational model and relational algebra. Exercises. 
-[[http://patterns.di.unipi.it/dsd/dsd.06.assignments.pdf|Exercises at home (Assignment IV) for the lesson 2022-08]].+[[http://131.114.72.230/dsd/dsd.06.assignments.pdf|Exercises at home (Assignment IV) for the lesson 2023-08]].
  
-**2022-07.** //Thursday 6 October 202214-16// **[DW: 2.1, 2.2, A.1, B.1]** [[http://patterns.di.unipi.it/dsd/video/dsd07_20211005.mp4|rec07 audio-video (.mp4) past years]]+**2023-07.** //Wednesday 11 October 202311-13//**[DW: 2.1, 2.2, A.1, B.1]** [[http://131.114.72.230/dsd/video/dsd07_20211005.mp4|rec07 audio-video (.mp4) past years]]
  
-More about data mart conceptual design, changing dimensions and advanced data model features. From Conceptual design to relational logical design. Star model, snowflake, and constellation. Logical schema of the Hospital case study. [[http://patterns.di.unipi.it/dsd/dsd.07.assignments.pdf|Exercises at home (Travel agency) for the lesson 2022-09]].+More about data mart conceptual design, changing dimensions and advanced data model features. From Conceptual design to relational logical design. Star model, snowflake, and constellation. Logical schema of the Hospital case study. [[http://131.114.72.230/dsd/dsd.07.assignments.pdf|Exercises at home (Travel agency) for the lesson 2023-09]].
  
-**2022-08.** //Wednesday 12 October 202211-13//  **[DB: 3.2-3.4]** [[http://patterns.di.unipi.it/dsd/video/dsd08_20211008.mp4|rec08 audio-video (.mp4) past years]]+**2023-08.** //Thursday 12 October 202314-16// **[DB: 3.2-3.4]** [[http://131.114.72.230/dsd/video/dsd08_20211008.mp4|rec08 audio-video (.mp4) past years]]
  
-Recalls: the relational model and relational algebra. Logical trees. [[http://patterns.di.unipi.it/dsd/dsd.08.exercises.pdf|Exercises with JRS]].  [[http://patterns.di.unipi.it/dsd/dsd.08.assignments.pdf|Exercises at home (Airline companies) for the lesson 2022-09]].+Recalls: the relational model and relational algebra. Logical trees. [[http://131.114.72.230/dsd/dsd.08.exercises.pdf|Exercises with JRS]].  [[http://131.114.72.230/dsd/dsd.08.assignments.pdf|Exercises at home (Airline companies) for the lesson 2023-09]].
  
-**2022-09.** //Thursday 13 October 202214-16// **[DW: A.2, B.2]** [[http://patterns.di.unipi.it/dsd/video/dsd09_20211012.mp4|rec09 audio-video (.mp4) past years]]+ 
 +**2023-09.** //Wednesday 18 October 202311-13// **[DW: A.2, B.2]** [[http://131.114.72.230/dsd/video/dsd09_20211012.mp4|rec09 audio-video (.mp4) past years]]
  
 Discussion of students' solutions of conceptual and logical design case studies.   Discussion of students' solutions of conceptual and logical design case studies.  
  
-**2022-10.** //Wednesday 19 October 202211-13// **[DW: 3.1-3.5]** [[http://patterns.di.unipi.it/dsd/video/dsd10_20211015.mp4|rec10 audio-video (.mp4) past years]]+**2023-10.** //Thursday 19 October 202314-16// **[DW: 3.1-3.5]** [[http://131.114.72.230/dsd/video/dsd10_20211015.mp4|rec10 audio-video (.mp4) past years]]
  
 Data Warehouse design approaches. Data mart logical design.  Data Warehouse design approaches. Data mart logical design. 
  
-**2022-11.** //Thursday 20  October 2022, 14-16// **[DW: 3.1-3.5]** [[http://patterns.di.unipi.it/dsd/video/dsd11_20221020.mp4|rec11 audio-video (.mp4) current year]]+**2023-11.** //**Tuesday 24  October 2022, 14-16, Room L1**// **[DW: 3.1-3.5]** [[http://131.114.72.230/dsd/video/dsd11_20221020.mp4|rec11 audio-video (.mp4) past years]]
  
-Slowly changing dimensions, fast changing dimensions, shared dimensions. Recursive hierarchies. Multivalued dimensions. [[http://patterns.di.unipi.it/dsd/dsd.11.assignments.pdf|Exercises at home (Travel agency extended) for the lesson 2022-12]].+Slowly changing dimensions, fast changing dimensions, shared dimensions. Recursive hierarchies. Multivalued dimensions. [[http://131.114.72.230/dsd/dsd.11.assignments.pdf|Exercises at home (Travel agency extended) for the lesson 2023-12]].
  
-**2022-12.** //Wednesday 26 October 202211-13//  **[DW: 4.1-4.8]** [[http://patterns.di.unipi.it/dsd/video/dsd12_20211022.mp4|rec12 audio-video (.mp4) past years]]+**2023-12.** //Thursday 2 November 202314-16//  **[DW: 4.1-4.8]** [[http://131.114.72.230/dsd/video/dsd12_20211022.mp4|rec12 audio-video (.mp4) past years]]
  
-A DW to support Analytical CRM Analysis. Wrap up on DW design.  [[http://patterns.di.unipi.it/dsd/dsd.12.assignments.pdf|Exercises at home for the lesson 2021-14]].+A DW to support Analytical CRM Analysis. Wrap up on DW design.  [[http://131.114.72.230/dsd/dsd.12.assignments.pdf|Exercises at home for the lesson 2023-14]].
  
-**2022-13.** //Thursday 27 October 2022, 14-16//  **[DW: 2.3, 2.4]**[[http://patterns.di.unipi.it/dsd/video/dsd13_20211026.mp4|rec13 audio-video (.mp4) past years]] 
  
-Multidimensional Cube model: OLAP OperationsThe extended cube and the lattice of cuboids. Pivot tables in Excel. PowerPivot.\\ +**2023-13.** //**Tuesday 7 November 2023, 14-16, Room L1**//  **[DW: 2.32.4]** [[http://131.114.72.230/dsd/video/dsd13a_20231107.mp4|rec13a audio-video (.mp4) current year]] and [[http://131.114.72.230/dsd/video/dsd13b_20211026.mp4|rec13b audio-video (.mp4) past years]]
-**Additional learning material:** +
-  GHarvey. Excel 2013 All-in-One For Dummies2013. [[http://patterns.di.unipi.it/dsd/PivotTable2013BookVIIchpt2.pdf|ChpVII-2]] and [[http://patterns.di.unipi.it/dsd/HerbalTeas.xlsx|example data for pivot table]]. +
-  * [[https://support.office.com/en-us/article/power-pivot-overview-and-learning-f9001958-7901-4caa-ad80-028a6d2432ed|Power Pivot overview]].+
  
-**2022-14.** //Wednesday November 2022, 11-13//  **[DB: 4.1-4.2,5.1-5.11]** [[http://patterns.di.unipi.it/dsd/video/dsd14_20221102.mp4|rec14 audio-video (.mp4) current year]]+Multidimensional Cube model: OLAP Operations. The extended cube and the lattice of cuboids. Pivot tables in Excel.\\ 
 +**Additional learning material:** G. Harvey. Excel 2013 All-in-One For Dummies, 2013. [[http://131.114.72.230/dsd/PivotTable2013BookVIIchpt2.pdf|Chp. VII-2]] and [[http://131.114.72.230/dsd/HerbalTeas.xlsx|example data for pivot table]]. 
 + 
 +**2023-14.** //Wednesday November 2023, 11-13//  **[DB: 4.1-4.2,5.1-5.11]** [[http://131.114.72.230/dsd/video/dsd14_20221102.mp4|rec14 audio-video (.mp4) current year]]
  
 Recalls on: DBMS, from SQL to extended relational algebra. Exercises.  Recalls on: DBMS, from SQL to extended relational algebra. Exercises. 
-[[http://patterns.di.unipi.it/dsd/dsd.14.assignments.pdf|Exercises at home for the lesson 2021-15]].+[[http://131.114.72.230/dsd/dsd.14.assignments.pdf|Exercises at home for the lesson 2023-15]].
  
-**2022-15.** //Thursday 3 November 202214-16//   **[DW: 5.1-5.3]** [[http://patterns.di.unipi.it/dsd/video/dsd15_20211102.mp4|rec15 audio-video (.mp4) past years]]+**2023-15.** //Wednesday 15 November 202311-36//   **[DW: 5.1-5.3]** [[http://131.114.72.230/dsd/video/dsd15_20211102.mp4|rec15 audio-video (.mp4) past years]]
  
 OLAP systems. Data Analysis Using SQL. Simple reports. Examples. Moderately Difficult Reports. Solutions in SQL.  OLAP systems. Data Analysis Using SQL. Simple reports. Examples. Moderately Difficult Reports. Solutions in SQL. 
-[[http://patterns.di.unipi.it/dsd/dsd.15.foodmart.pdf|Foodmart datawarehouse schema]].+[[http://131.114.72.230/dsd/dsd.15.foodmart.pdf|Foodmart datawarehouse schema]].
  
-**2022-16.** //Wednesday 9 November 202211-13//  **[DW: 5.4-5.5]** [[http://patterns.di.unipi.it/dsd/video/dsd16_20211105.mp4|rec16 audio-video (.mp4) past years]]+**2023-16.** //Thursday 16 November 202314-16//  **[DW: 5.4-5.5]** [[http://131.114.72.230/dsd/video/dsd16_20211105.mp4|rec16 audio-video (.mp4) past years]]
  
-Examples of variance reports. Very Difficult Reports without Analytic SQL. Example of reports with ranks. Analytic Functions with the use of partitions and running totals. Examples.  [[http://patterns.di.unipi.it/dsd/dsd.16.assignments.pdf|Exercises at home for the lesson 2021-17]].+Examples of variance reports. Very Difficult Reports without Analytic SQL. Example of reports with ranks. Analytic Functions with the use of partitions and running totals. Examples.  [[http://131.114.72.230/dsd/dsd.16.assignments.pdf|Exercises at home for the lesson 2023-17]].
  
-**2022-17.** //Thursday 10 November 2022, 14-16//   **[DW: 5.5-5.6]** [[http://patterns.di.unipi.it/dsd/video/dsd17_20211109.mp4|rec17 audio-video (.mp4) past years]]+**2023-17.** //**Tuesday 21 November 2023, 14-16, Room L1**//    **[DW: 5.5-5.6]** [[http://131.114.72.230/dsd/video/dsd17_20211109.mp4|rec17 audio-video (.mp4) past years]]
  
-Analytic Functions with the use of moving windows. Examples. Exercises on Analytic SQL. [[http://patterns.di.unipi.it/dsd/dsd.17.assignments.pdf|Exercises during the lesson and at home]] and [[http://patterns.di.unipi.it/dsd/dsd.17.solutions.txt|solutions]].+Analytic Functions with the use of moving windows. Examples. Exercises on Analytic SQL. [[http://131.114.72.230/dsd/dsd.17.assignments.pdf|Exercises during the lesson and at home]] and [[http://131.114.72.230/dsd/dsd.17.solutions.txt|solutions]]. 
 + 
 +**2023-18.** //Wednesday 22 November 2023, 11-13//   **[DB: 6.1-6.6, 6.8, 7.1-7.2]** [[http://131.114.72.230/dsd/video/dsd18_20211112.mp4|rec18 audio-video (.mp4) past years]]
  
-**2022-18.** //Wednesday 16 November 2022, 11-13//  **[DB: 6.1-6.6, 6.8, 7.1-7.2]** [[http://patterns.di.unipi.it/dsd/video/dsd18_20211112.mp4|rec18 audio-video (.mp4) past years]] 
 Recalls of relational DBMS internals: Storage, Indexing and Query Evaluation. Physical operators and physical plans for projection, selection, joins and grouping. Examples. Recalls of relational DBMS internals: Storage, Indexing and Query Evaluation. Physical operators and physical plans for projection, selection, joins and grouping. Examples.
  
-**2022-19.** //Thursday 17 November 202214-16// **[DW: 6.1-6.4]** [[http://patterns.di.unipi.it/dsd/video/dsd19_20211116.mp4|rec19 audio-video (.mp4) past years]]+**2023-19.** //Wednesday 29 November 202311-13// **[DW: 6.1-6.4]** [[http://131.114.72.230/dsd/video/dsd19_20211116.mp4|rec19 audio-video (.mp4) past years]]
  
 Data Warehouse Systems: Special-Purpose Indexes and Star Query Plan. Bitmap indexes. Join indexes. Star queries optimization and query plans. Examples. Table partitioning. Data Warehouse Systems: Special-Purpose Indexes and Star Query Plan. Bitmap indexes. Join indexes. Star queries optimization and query plans. Examples. Table partitioning.
  
-**2022-19 bis.** //Wednesday 23 November 202211-13// **[DW: 6.5-6.8]**  [[http://patterns.di.unipi.it/dsd/video/dsd24_20211203.mp4|rec24 audio-video (.mp4) past years]]+**2023-19 bis.** //Thursday 30 November 202314-16, **Room Seminari Est at the Computer Science Dept.**// **[DW: 6.5-6.8]**  [[http://131.114.72.230/dsd/video/dsd24_20211203.mp4|rec24 audio-video (.mp4) past years]]
  
-**For non-attending students:** Seminar (in Italian): Sistema per l’analisi di dati statici di supporto alle decisioni (V. Minei and R. Mosca, [[https://www.sadasdb.com/en/|Sadas s.r.l.]])+**For attending students:** Seminar (in Italian): //Sistema per l’analisi di dati statici di supporto alle decisioni// (V. Minei and R. Mosca, [[https://www.sadasdb.com/en/|Sadas s.r.l.]])
  
-**For non-attending students:** Data Warehousing trends: column-oriented DW, main-memory DW, Big Data framework.+**For non-attending students:** Data Warehousing trends: column-oriented DW, main-memory DW, Big Data framework. (see recorded lesson from past years).
  
  
-**2022-20.** //Thursday 24 November 202214-16//  //Friday 19 November 2021, 16-18// **[DW: 7.1-7.7]**[[http://patterns.di.unipi.it/dsd/video/dsd20_20211119.mp4|rec20 audio-video (.mp4)]]+**2023-20.** //Wednesday 6 December 202311-13// **[DW: 7.1-7.7]**[[http://131.114.72.230/dsd/video/dsd20_20211119.mp4|rec20 audio-video (.mp4) past years]]
  
-The problem of materialized views selection. The lattice of views and the greedy algorithm HRU for the selection of materialized views. Examples. Other algorithms for the choice of the views to materialize with a workload and dimensional hierarchies.  [[http://patterns.di.unipi.it/dsd/dsd.20.assignments.pdf|Exercises at home for the lesson 2021-21]].+The problem of materialized views selection. The lattice of views and the greedy algorithm HRU for the selection of materialized views. Examples. Other algorithms for the choice of the views to materialize with a workload and dimensional hierarchies.  [[http://131.114.72.230/dsd/dsd.20.assignments.pdf|Exercises at home for the lesson 2023-21]].
  
- +**2023-21.** //Thursday 7 December 202314-16// **[DW: 8.1-8.2, DB: 3.5.1-3.5.4]** [[http://131.114.72.230/dsd/video/dsd21_20221130.mp4|rec21 audio-video (.mp4) past years]]
-**2022-21.** //Wednesday 30 November 202211-13//  +
- +
-... +
- +
- +
-=====Class calendar previous A. Y. ===== +
- +
- +
- +
-**2021-21.** //Tuesday 23 November 2021, 9-11//  **[DW: 8.1-8.2, DB: 3.5.1-3.5.4]** [[http://patterns.di.unipi.it/dsd/video/dsd21_20211123.mp4|rec21 audio-video (.mp4)]]+
  
 Recalls of functional dependency properties and how they are used to reason about the properties of the result of a query. Properties of the group-by operator. Recalls of functional dependency properties and how they are used to reason about the properties of the result of a query. Properties of the group-by operator.
  
-**2021-22.** //Friday 26 November 202116-18// **[DW: 8.3-8.6]** [[http://patterns.di.unipi.it/dsd/video/dsd22_20211126.mp4|rec22 audio-video (.mp4)]]+**2023-22.** //**Monday 11 December 202314-16, Room M1**// **[DW: 8.3-8.6]** [[http://131.114.72.230/dsd/video/dsd22_20221201.mp4|rec22 audio-video (.mp4) past years]]
  
 The problem of evaluating the group-by before the join operator. First case: Invariant grouping. Examples. Other cases: double grouping, grouping and counting. Examples with star queries. The problem of evaluating the group-by before the join operator. First case: Invariant grouping. Examples. Other cases: double grouping, grouping and counting. Examples with star queries.
  
-**2021-23.** //Tuesday 30 November 20219-11// **[DW: 9.1-9.4]** [[http://patterns.di.unipi.it/dsd/video/dsd23_20211130.mp4|rec23 audio-video (.mp4)]]+**2023-23.** //Wednesday 13 December 2023, 11-13, ** Room M1**// **[DW: 9.1-9.4]** [[http://131.114.72.230/dsd/video/dsd23_20211130.mp4|rec23 audio-video (.mp4) past years]]
  
 The problem of query rewrite to use a materialized view. Hypothesis and two approaches: With a compensation on the logical view plan, and with a transformation of logical query plan. Examples. The problem of query rewrite to use a materialized view. Hypothesis and two approaches: With a compensation on the logical view plan, and with a transformation of logical query plan. Examples.
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 =====Previous years===== =====Previous years=====
  
 +  * [[mds:dsd:2022|Decision Support Databases  A.Y. 2022/23]]
   * [[mds:dsd:2021|Decision Support Databases  A.Y. 2021/22]]   * [[mds:dsd:2021|Decision Support Databases  A.Y. 2021/22]]
 +  * [[mds:dsd:2020|Decision Support Databases  A.Y. 2020/21]] (special edition)
  
mds/dsd/start.1668094503.txt.gz · Ultima modifica: 10/11/2022 alle 15:35 (17 mesi fa) da Salvatore Ruggieri