storage and computer networks‚ the sizes‚ capabilities‚ and performance of databases and their respective DBMSs have grown in orders of magnitudes. The development of database technology can be divided into three eras based on data model or structure: navigational‚ SQL/relational‚ and post-relational. The two main early navigational data models were the hierarchical model‚ epitomized by IBM’s IMS system‚ and the Codasyl model (Network model)‚ implemented in a number of products such as IDMS. The relational model
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1. After reviewing the history on SQL server‚ I have found that there have been 7 revisions of the SQL standard. In the most recent‚ SQL 2011‚ there were many new non-temporal features. You have DELETE in MERGE‚ Pipelined DML‚ CALL enhancements‚ Limited fetch capability‚ Collection type enhancements‚ non-enforced table constraints‚ and window enhancements. With SQL:2011 replacing SQL:2008 as the standard in December of 2011‚ there were also some new DDL features that improved the usability of generated
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Navigational models Relational model Devel. Use Properties Some data independence‚ but the model invites dependence. Requires procedural queries. Simple‚ easy to use for non-experts. Strong data independence. Standard nonprocedural query language (SQL). Excellent implementations exist. Limited expressive capability. Powerful expressive capability‚ but require substantial expertise for use. Popular in niche applications. Standardization not
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behind recent developments in the fields of data warehousing and Online Analytical Processing (OLAP). 1. Overview Review of relational database systems‚ ER diagram‚ SQL. 2. Integrity and Security Domain constraints; referential integrity‚ assertions; triggers; triggers and Assertions in SQL. Security and Authorization; Authorization in SQL. 3. Relational Database Design First Normal form; pitfalls in relational database design‚ functional dependencies; decomposition. Desirable properties of decomposition
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run within the database? (Choose all correct answers.) A. C B. Java C. PL/SQL D. SQL E. Any other language‚ if it is linked with the OCI libraries | | 2. | In a web application‚ on which tier does the application software run? (Choose the best answer.) A. In the web browser on the client tier B. On the middle tier C. Within a Java-enabled database | | Answers | 1. | B‚ C‚ and D. SQL‚ PL/SQL‚ and Java are implemented internally to the database. A is wrong because C is
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Record Management System for Solid Waste Management‚ Municipality of Solano. 1.1 Project Overview: Before‚ it was an open dumpsite. Garbage has to be burned to minimize space even longer usage of dumpsite. But there was a sudden change when an order coming from DENR telling that frequent burning has to be stopped because they found out that smoke coming from burned garbage is hazardous to the ozone layer. Thus‚ a resolution had been approved and a Clean Air Act and Segregation had been
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depends on the type of attack that has occurred at that time. Listed below is a list of the common weaknesses and attacks associated with e-commerce and social networking applications. Common Weaknesses‚ Attacks‚ Motivation‚ and Roles Involved SQL Injection A SQL‚ or sequel‚ Injection refers to an attacker inserting sequel coding into the user input‚ such as the username/password user input at the applications login screen. Doing this‚ the attacker would be able to gain access to the list of passwords
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statements Advanced SELECT statements Joining Tables SQL functions Set operators Subqueries Views Page 4 21 37 48 64 77 94 114 121 133 Keeley Crockett 2 ORACLE 10g Lab Guide Introduction to the ORACLE 10g Lab Guide This lab guide is designed to provide examples and exercises in the fundamentals of SQL within the ORACLE 10g environment. The objective is not to develop full blown applications but to illustrate the concepts of SQL using simple examples. The lab guide has been divided
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Trident University Anuj Kainth Module 2 SLP CSC 316 – Database Systems I Professor: Michael J. Pelosi 7 February 2014 "Database Design for the PC Store Project" Introduction The database design for the PC Store project needs to fulfill several requirements the management has to oversee the sales‚ operations and profits of the store. The requested data will include Sales Transactions List‚ Inventory Status List‚ Monthly Profit Reports‚ Monthly Report of PCs not selling and Inventory Status
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