Embedded systems architecture a comprehensive guide for engineers and programmers

... 1 1 1 1 1 1 1 xv 1Chapter Objectives 2 91 1Why is Data Quality Critical? 292 What is Data Quality? 292 Benefits of Improved Data Quality 295 Types of Data Quality Problems 296 1Data Quality Challenges ... The data in a data warehouse is not as volatile as the data in an operational database is The data in a data warehouse is primarily for query and analysis...

Ngày tải lên: 08/08/2014, 18:22

... columns: a 10 nonvolatile data dual data granularity dependent data mart disparate data decision support data staging data mining metadata operational systems internal data A B C D E F G H I J roadmap ... metadata contain all of this information about the operational data sources Extraction and Transformation Metadata Extraction and transformation metadata contain data a...

Ngày tải lên: 08/08/2014, 18:22

... recap the major architectural components as discussed in Chapter 2: ț Source data Production data Internal data Archived data External data ț Data staging Data extraction Data transformation Data ... documents, and spreadsheets ț External data sources Data Staging ț Data mapping between data sources and staging area data structures ț Data transformations ț Data...

Ngày tải lên: 08/08/2014, 18:22

... SIGNIFICANT ROLE OF METADATA ț Data model for special databases for OLAP ț Schedules for retrieving data for OLAP Challenges for Metadata Management Although metadata is so vital in a data warehouse ... incremental loads Data loading job streams Data Storage ț ț ț ț ț ț Data models for centralized data warehouse and dependent data marts Subject area groupings of...

Ngày tải lên: 08/08/2014, 18:22

... access the customer demographics in the data warehouse The customer data as an integrated whole lacks data quality DATA ACCURACY DATA INTEGRITY DATA QUALITY DATAQUALITY Specific instance of an ... major functional areas of the data warehouse We reviewed the capture and use of metadata in the three areas of data acquisition, data storage, and information delivery Metadata in...

Ngày tải lên: 08/08/2014, 18:22

... think data quality is critical in a data warehouse Explain how data quality is much more than just data accuracy Give an example Briefly list three benefits of quality data in a data warehouse ... Committee Agree on a suitable data quality framework Institute data quality policy and standards Select high impact data elements and determine priorities Define quality meas...

Ngày tải lên: 08/08/2014, 18:22

... WAREHOUSE Data Storage Underlying Technologies Functions and Features ROLAP Data stored as relational tables in the warehouse Detailed and light summary data available Very large data volumes All data ... retrieval Summary data access from MDDB, detailed data access from warehouse Sparse matrix technology to manage data sparsity in summaries MOLAP Data stored as relational t...

Ngày tải lên: 08/08/2014, 18:22

... physical storage as files, blocks, and records Data Staging Area Data Extract Flat Files Relational Database data files (transformed data) Relational Database index files Load Image Flat Files Figure ... 18-6 Data Warehouse Repository Relational Database data files (warehouse data) Partitioned Physical Files Relational Database index files Detailed data and light summaries OLAP...

Ngày tải lên: 08/08/2014, 18:22

... access, maintain, manage, and safeguard data in databases DD Data Dictionary A catalog or directory in a database management system that stores the data structures and relationships DDL Data Definition ... tables Data warehouse navigation Data granularity and aggregate tables Source systems and data extractions Data transformation and cleansing rules Business terms and mea...

Ngày tải lên: 08/08/2014, 18:22

... information WHY METADATA IS IMPORTANT 181 METADATA ESSENTIAL FOR IT Source data structures Source platforms Data extraction methods External data Data transformation rules METADATA VITAL FOR ... definitions: ț ț ț ț ț ț ț ț ț Data about the data Table of contents for the data Catalog for the data Data warehouse atlas Data warehouse roadmap Data warehouse directory...

Ngày tải lên: 08/08/2014, 18:22

... SIGNIFICANT ROLE OF METADATA ț Data model for special databases for OLAP ț Schedules for retrieving data for OLAP Challenges for Metadata Management Although metadata is so vital in a data warehouse ... incremental loads Data loading job streams Data Storage ț ț ț ț ț ț Data models for centralized data warehouse and dependent data marts Subject area groupings of...

Ngày tải lên: 08/08/2014, 18:22

... and trade II Fundamentals of Marketing A Marketing Guide for Small and Medium Sized Primary Forest Products Processors publications is typically based upon the number of words and size, it can ... to guide your thoughts and ideas Each question, once considered and answered, will eventually facilitate your process of forming a marketing plan A Marketi...

Ngày tải lên: 18/02/2014, 22:20