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55 Cards in this Set
- Front
- Back
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Database
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-usually a group of files |
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File
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-all files are integrated |
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Record |
-Group of related fields |
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Data Hierarchy
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?? |
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Critical component of information systems
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-Any type of analysis that's done is based on data available in the database |
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Database Management System (DBMS)
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-Creating, storing, maintaining, and accessing database files |
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Advantages over a flat file system
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??? |
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Internal Data
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-Collected within organization |
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External Data
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- outside sources |
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Sequential File Structure
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-Organized based on a "primary key" -Usually used for backup and archive files |
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Random Access File Structure
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-Records can be accessed in any order -Fast and very effective when a small number of records needs to be processed daily or weekly |
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Indexed sequential access method (ISAM)
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-Depending on the number being accessed |
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Indexed access
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Indexed value Pointer to the disk location of the record mathing the indexed value |
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Physical view
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-How data is stored on and retrieved from storage media
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Logical view
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-How it can be organized and retrieved -Can be more than one logical view |
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Data Model
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Hierarchical model |
?? |
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Network Model
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Relational Model
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Data Dictionary
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Primary keys
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Foreign Key
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Normalization |
?? |
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Data retrieval
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Components of DBMS
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??
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Database Engine
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?? |
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Data Definition
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slide 21 |
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Data Manipulation
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slide 22?? |
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Application Generation
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?? |
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Data Administration
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slide 24?? |
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Recent Trends in Database design and use
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25?? |
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Data-Driven Web Sites
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26??
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Distribution Database
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27?? |
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Object-oriented database
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?? |
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Encapsulation
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Inheritance |
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Data Warehouse
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-Collection of data used to support decision-making applications and generate business intelligence |
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What are characteristics of "Data Warehouse" in contrast to data in a database? |
-Integrated -Time variant -Type of data -Purpose |
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What is subject oriented?
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Database created to serve a specific problem |
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What is integrated? |
when you can pull data for different subjects in one.
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what is Time variant?
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defines time in data
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What are the variety of Input sources for data warehouse?
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-Database -Transaction Files -ERP systems -CRM systems |
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What does ETL stand for?
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Extraction, Transformation, and Loading |
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What is Extraction?(ETL)
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-Converting data into a format that can be used in transformation processing |
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What is Transformation Processing |
-Makes sure data meets the data warehouse's needs
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What is loading?(ETL)
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-Process of transferring data to the data warehouse |
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What is "storage"?
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-Summary data -Metadata (collection of everything) |
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What does Data warehouse do with output?
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-Supports different type of analysis and generates reports for decision making. |
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What is Online Analytical Processing (OLAP)? |
-Uses multiple sources of information and provides -Hypercube -Drill down and drill up |
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What is data-mining analysis
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-Discover patterns and relationships |
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What do data warehouse reports allow you to do?
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-Find patterns and trends that can't be found with databases -Analyze large amounts of historical data quickly -Assist management in making well-informed business decisions |
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What is Data Mart?
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-Smaller version of data warehouse -Used by singled department or function (smaller coverage basically..) |
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What advantages does Data Mart have over data warehouse?
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?? |
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What is Business Analytics (BA)?
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-uses data and statistical methods to gain insight into the data -provide decision makers with information to act on |
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What are the different types of BA methods?
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-Predictive analytics |
