Introdução às Bases de Dados
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Introdução às Bases de Dados
- 2. Endereços do Porão Entrega de trabalhos: via Moodle Endereço para dúvidas: Fórum apoio à uc no Moodle
- 3. Referências 1. Caldeira, C. (2015). A Arte das Bases de Dados. 1ª Edicão – 2ª Impressão. Edições Sílabo, Lisboa. 2. Mullins, C. (2012). Database Administration: The Complete Guide to Practices and Procedures. 2nd Edition. Addison-Wesley Professional.
- 5. Mercado (análise da Gartner)
- 6. DB-Engines Ranking of Relational DBMS, Fev. 2015
- 7. DB-Engines Ranking of Relational DBMS, Jan. 2016
- 8. DB-Engines Ranking – Tendência na popularidade
- 9. Plataformas • Mainframes • Unix, (Linux,…) • Windows • Apple • …….
- 10. Ofertas de Emprego – 05/02/2015
- 11. Ofertas de Emprego – 27/01/2016
- 12. Ofertas de Emprego – 27/01/2016
- 13. Ofertas de Emprego (www.itjobs.pt) – 27/01/2016
- 14. Ofertas de Emprego (emprego.sapo.pt) – 27/01/2016
- 15. Mitos das Bases de Dados • IDs como chave primária • Denominações • Regras de integridade • E-R
- 16. Mitos das Bases de Dados 1970 – Cood “A Relational Model of Data for Large Shared Data Banks” 1976 – Chen “The Entity-Relationship Model: Toward a Unified View of Data”
- 18. Entidade Fraca MOVIMENTOCONTA CONTA_CLIENTE 1 n nº saldo nº data valor
- 19. Agregação
- 20. 1ªs versões de SGBDR 1971 – ADABAS 1979 – ORACLE (version 2)
- 21. Funções dos SGBDR Numa perspectiva macro todos os SGBDR fazem a mesma coisa: • Armazenar e pesquisar dados • Gerir o espaço de armazenamento • Mecanismos de salvaguarda e recuperação • Utilizam a RAM como vector de performance • Aplicam o locking como medida integridade • Incluem o SQL • Outros……
- 22. Funções do DBA Numa perspectiva macro todos os DBAs fazem a mesma coisa. Como um automóvel também todos os SGBDR têm denominadores comuns: são semelhantes entre si. Podem é ter que ser conduzidos de modos diferentes: • Características • Via de comunicação
Notes de l'éditeur
- Founded in August 1977 by Larry Ellison, Bob Miner, Ed Oates and Bruce Scott, Oracle was initially named after "Project Oracle" a project for one of their clients, the C.I.A, and the company that developed Oracle was dubbed "Systems Development Labs", or SDL. Although they may not have realized it at the time, these four men would change the history of database management forever. In 1978 SDL was renamed Relational Software Inc (RSI) to market their new database. 1979 - Oracle release 2 The first commercial RDBMS was built using PDP-11 assembler language. Although they created a commercial version of RDBMS in 1977, it wasn't available for sale until 1979 with the launch of Oracle version 2. The company decided against starting with version 1 because they were afraid that the term "version 1" might be viewed negatively in the marketplace. USA Air Force and then CIA were the first customers to use Oracle 2. In 1982 there was another change of the company?s name, from RSI to Oracle Systems Corporation so as to match its popular database name. The current company name comes from a CIA project that Larry Ellison had previously worked on code named ?Oracle?. 1983 - Oracle release 3 The Oracle version 3 was developed in 1983. This version was assembled using C programming language and could run in mainframes, minicomputers, and PCs ? or any hardware with a C compiler. It supported the execution of SQL statements and transactions. This version also included new options of pre-join data to increase Oracle optimization. 1984 - Oracle release 4 Despite the advances introduced in version 3, demand was so great that Oracle was compelled to improve the software even further with the release of version 4 in 1984. Oracle version 4 included support for reading consistency, which made it much faster than any previous version. Oracle version 4 also brought us the introduction of the export/import utilities and the report writer, which allows one the ability to create a report based on a query.
- E todos os modernos SGBDR como, por exemplo, Oracle, Microsoft SQL Server, IBM DB2, PostgreSQL, MySQL são diferentes implementações do mesmo conceito: a Teoria Relacional.