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mds:dsd:start [12/11/2021 alle 17:42 (3 anni fa)] Salvatore Ruggieri [Class calendar] |
mds:dsd:start [04/12/2021 alle 13:44 (2 anni fa)] Salvatore Ruggieri [Mandatory teaching material] |
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=====Mandatory teaching material ===== | =====Mandatory teaching material ===== | ||
- | * **[DW]** A. Albano, S. Ruggieri. [[http://patterns.di.unipi.it/bsd/ | + | * **[DW]** A. Albano, S. Ruggieri. [[http://fondamentidibasididati.it/wp-content/ |
- | * **[DB]** A. Albano. [[http:// | + | * **[DB]** A. Albano. [[http:// |
- | * Examples of [[http:// | + | * Examples of [[http:// |
=====Software===== | =====Software===== | ||
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^ Date ^ Hour ^ Room ^ Notes ^ | ^ Date ^ Hour ^ Room ^ Notes ^ | ||
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+ | | 8/2/2022 | ||
< | < | ||
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**2021-17.** //Tuesday 9 November 2021, 9-11// | **2021-17.** //Tuesday 9 November 2021, 9-11// | ||
- | Analytic Functions with the use of moving windows. Examples. Exercises on Analytic SQL. [[http:// | + | Analytic Functions with the use of moving windows. Examples. Exercises on Analytic SQL. [[http:// |
**2021-18.** //Friday 12 November 2021, 16-18// **[DB: 6.1-6.6, 6.8, 7.1-7.2]** [[http:// | **2021-18.** //Friday 12 November 2021, 16-18// **[DB: 6.1-6.6, 6.8, 7.1-7.2]** [[http:// | ||
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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. | ||
- | **2021-19.** //Tuesday 16 November 2021, 9-11// **[DW: 6.1-6.4]** | + | **2021-19.** //Tuesday 16 November 2021, 9-11// **[DW: 6.1-6.4]** |
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. | ||
- | **2021-20.** //Friday 19 November 2021, 16-18// **[DW: 7.1-7.7]** | + | **2021-20.** //Friday 19 November 2021, 16-18// **[DW: 7.1-7.7]**[[http:// |
- | 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. | + | 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:// |
- | **2021-21.** //Tuesday 23 November 2021, 9-11// | + | **2021-21.** //Tuesday 23 November 2021, 9-11// |
- | ... | + | 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 2021, 16-18// **[DW: 8.3-8.6]** [[http:// | ||
+ | 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 2021, 9-11// **[DW: 9.1-9.4]** [[http:// | ||
+ | |||
+ | 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. | ||
+ | |||
+ | **2021-24.** //Friday 3 December 2021, 16-18// **[DW: 6.5-6.8]** | ||
+ | |||
+ | Data Warehousing trends: column-oriented DW, main-memory DW, Big Data framework. | ||
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