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Relational Database Design
Relational Database Design

... Chapter 4: Relational Database Design Information Technology Department Bryar Hassan (MSc Eng.) bryar.hassan@kissr.edu.krd ...
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... •Determine the _______________________ of fields. Step 1−Plan and Design the Database ƒDetermine the ____________________ of the database file. ƒInclude all fields necessary to ensure efficient _____________________- and retrieving of specified data. ƒProject how the fields may be __________________ ...
Toad DB Administration Best Practices
Toad DB Administration Best Practices

... • Acknowledgement that the application is part of an evolving lifecycle which will continue to iterate over a period of time • Determination to deliver a quality product or what we used to call “taking pride in your work” ! ...
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... Each application programmer must maintain their own data Each application program needs to include code for the metadata of each file Each application program must have its own processing routines for reading, inserting, updating and deleting data Lack of coordination and central control Non-standar ...
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... CEO – DOT Vision Company Diploma in Project Management, Alison Courses Java Certified Associate – Oracle University , United States Oracle SQL Expert – Oracle University , United States OCA PL/SQL Developer – Oracle University OCA DBA – Oracle University , United States OCP Oracle Developer – Oracle ...
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...  Imagine declaring a Java object to be “persistent”  Everything reachable from that object will also be persistent  You then write plain old Java code, and all changes to the persistent objects are stored in a database  When you run the program again, those persistent objects have the same value ...
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... List of same-type values: One column of values (same datatype) – Might be one column, multiple rows – Might be one column, one row (special case of #1 above) – NOT a row of values (that is a special case of #3 below) • One column means that all values have the same datatype • One row means that each ...
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... this session). - Exclusive locks: Allow no sharing; the resource under an exclusive lock is unavailable to any other transaction or process. - Schema locks: Used when table-data definition is about to change?for example, when a column is added to or removed from the table. - Bulk update locks: A spe ...
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... What is SQL? • Language developed by IBM in 1970s for manipulating structured data and retrieving said data • Several competing implementations from IBM, Oracle, PostgreSQL, Microsoft (we use this one, specifically SQL Server 2008) • Queries: statements that retrieve data ...
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GIS Development: Step5 - DB Planning and Design Step6

... larger database for far less cost; (ii) the development of more efficient interaction between public agencies; and (iii) all agencies shared the same up-to-date database / information. Database maintenance requires two efforts: ongoing user training (how to maintain the database) and user support ( ...
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... Data Definition Language • Specification notation for defining the database schema Example: create table account ( account_number char(10), branch_name char(10), balance integer); • DDL compiler generates a set of tables stored in a data dictionary • Data dictionary contains metadata (i.e., data ab ...
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... Java. It takes full advantage of the Java environment to simplify development and deployment. The architecture of Oracle Berkeley DB Java Edition supports very high performance and concurrency for both read-intensive and write-intensive workloads. • It is not SQL and different from the majority of J ...
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Physical Database Design - NUS School of Computing
Physical Database Design - NUS School of Computing

... complex business rules such as sequence rules, cross-domain business rules, and complex data domain rules. Using triggers to implement complex business rules. 19. Controlling Access to Data – Restricting access to commands and data. 20. Managing Object Sizes - Calculating the estimated size of a dat ...
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... • Used to select results based on the result of a query • Consists of a main query and one or more subqueries. – Main query: first query that appears in the SELECT command – Subquery retrieves values that the main query’s search condition must match ...
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... • Relationship: describes an association among entities – One-to-many (1:M or 1..*) relationship – Many-to-many (M:N or M:M or *..*) relationship – One-to-one (1:1 or 1..1) relationship • Constraint: a restriction placed on the data.  Constraints are normally expressed in form of rules  Constraint ...
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Entity–attribute–value model

Entity–attribute–value model (EAV) is a data model to describe entities where the number of attributes (properties, parameters) that can be used to describe them is potentially vast, but the number that will actually apply to a given entity is relatively modest. In mathematics, this model is known as a sparse matrix. EAV is also known as object–attribute–value model, vertical database model and open schema.
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