diplomsko delo
Tina Bogataj (Author), Aljaž Zrnec (Mentor), Marko Poženel (Co-mentor)

Abstract

Pri načrtovanju podatkovnega skladišča se razvijalci pogosto srečajo z zahtevo po ohranjanju zgodovine sprememb. Za izpolnitev zahteve izberejo enega od osmih tipov počasi spreminjajočih dimenzij. Primernost tipa počasi spreminjajočih dimenzij se določi glede na potrebe poslovnih uporabnikov in števila podatkov, ki jih bodo hranili. V sklopu diplomske naloge bomo izdelali rešitev, ki bo uporabila eno od tipov počasi spreminjajočih dimenzij. Glavni del rešitve, ki bo reševal problem hranjenja zgodovine, bo razvit v sistemu Exasol s pomočjo skript, napisanih v programskem jeziku Lua. V rešitvi smo uporabili tip 7 počasi spreminjajočih dimenzij in s tem izpolnili zahtevo po hranjenju zgodovine sprememb. Z uporabo tega tipa lahko iz tabele dejstev neposredno dostopamo do podatkov, ki so bili veljavni ob vnosu zapisa, ali pa do podatkov, ki so veljavni sedaj.

Keywords

podatkovno skladišče;počasi spreminjajoče dimenzije;Exasol;Airflow;PostgreSQL;visokošolski strokovni študij;diplomske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FRI - Faculty of Computer and Information Science
Publisher: [T. Bogataj]
UDC: 004.65(043.2)
COBISS: 142269955 Link will open in a new window
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Downloads: 8
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Other data

Secondary language: English
Secondary title: Using slowly changing dimensions in a data warehouse
Secondary abstract: When planning a data warehouse, developers are often faced with the requirement to maintain a history of changes. To meet the requirements, they choose one of eight slowly changing dimensions types. The type of slowly changing dimensions that suits the most business requirements is determined by the needs of business users and the amount of data they will store. As part of the thesis, we will create a solution that will use one of the types of slowly changing dimensions. The main part of the solution, which will solve the problem of preserving history, will be developed in the Exasol system with the help of scripts written in the Lua programming language. We used the slowly changing dimensions type 7 in the solution, thus fulfilling the requirement to keep a history of changes. Using this type, we can directly access the data that was valid at the time of entering the record or the data that is valid now from the fact table.
Secondary keywords: data warehouse;slowly changing dimensions;Exasol;Airflow;PostgreSQL;computer science;diploma;Skladiščenje podatkov;Računalništvo;Univerzitetna in visokošolska dela;
Type (COBISS): Bachelor thesis/paper
Study programme: 1000470
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za računalništvo in informatiko
Pages: 65 str.
ID: 18011598