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Introduction xxv 1 The Reader at a Glance 1 Setting Up for Success 1 1.1 Resist the Urge to Start Coding 1 1.2 Set Your Boundaries 4 Tackling DW/BI Design and Development 6 1.3 Data Wrangling 6 1.4 Myth Busters 9 1.5 Dividing the World 10 1.6 Essential Steps for the Integrated Enterprise Data Warehouse 13 1.7 Drill Down to Ask Why 22 1.8 Slowly Changing Dimensions 25 1.9 Judge Your BI Tool through Your Dimensions 28 1.10 Fact Tables 31 1.11 Exploit Your Fact Tables 33 2 Before You Dive In 35 Before Data Warehousing 35 2.1 History Lesson on Ralph Kimball and Xerox PARC 36 Historical Perspective 37 2.2 The Database Market Splits 37 2.3 Bringing Up Supermarts 40 Dealing with Demanding Realities 47 2.4 Brave New Requirements for Data Warehousing 47 2.5 Coping with the Brave New Requirements 52 2.6 Stirring Things Up 57 2.7 Design Constraints and Unavoidable Realities 60 2.8 Two Powerful Ideas 64 2.9 Data Warehouse Dining Experience 67 2.10 Easier Approaches for Harder Problems 70 2.11 Expanding Boundaries of the Data Warehouse 72 3 Project/Program Planning 75 Professional Responsibilities 75 3.1 Professional Boundaries 75 3.2 An Engineer’s View 78 3.3 Beware the Objection Removers 82 3.4 What Does the Central Team Do? 86 3.5 Avoid Isolating DW and BI Teams 90 3.6 Better Business Skills for BI and Data Warehouse Professionals 91 3.7 Risky Project Resources are Risky Business 93 3.8 Implementation Analysis Paralysis 95 3.9 Contain DW/BI Scope Creep and Avoid Scope Theft 96 3.10 Are IT Procedures Beneficial to DW/BI Projects? 98 Justification and Sponsorship 100 3.11 Habits of Effective Sponsors 100 3.12 TCO Starts with the End User 103 Kimball Methodology 108 3.13 Kimball Lifecycle in a Nutshell 108 3.14 Off the Bench111 3.15 The Anti-Architect112 3.16 Think Critically When Applying Best Practices 115 3.17 Eight Guidelines for Low Risk Enterprise Data Warehousing 118 4 Requirements Definition 123 Gathering Requirements 123 4.1 Alan Alda’s Interviewing Tips for Uncovering Business Requirements 123 4.2 More Business Requirements Gathering Dos and Don’ts 127 4.3 Balancing Requirements and Realities 129 4.4 Overcoming Obstacles When Gathering Business Requirements 130 4.5 Surprising Value of Data Profiling 133 Organizing around Business Processes 134 4.6 Focus on Business Processes, Not Business Departments! 134 4.7 Identifying Business Processes 135 4.8 Business Process Decoder Ring 137 4.9 Relationship between Strategic Business Initiatives and Business Processes 138 Wrapping Up the Requirements 139 4.10 The Bottom-Up Misnomer 140 4.11 Think Dimensionally (Beyond Data Modeling) 144 4.12 Using the Dimensional Model to Validate Business Requirements 145 5 Data Architecture 147 Making the Case for Dimensional Modeling 147 5.1 Is ER Modeling Hazardous to DSS? 147 5.2 A Dimensional Modeling Manifesto 151 5.3 There are No Guarantees 159 Enterprise Data Warehouse Bus Architecture 163 5.4 Divide and Conquer 163 5.5 The Matrix 166 5.6 The Matrix: Revisited 170 5.7 Drill Down into a Detailed Bus Matrix 174 Agile Project Considerations 176 5.8 Relating to Agile Methodologies 176 5.9 Is Agile Enterprise Data Warehousing an Oxymoron? 177 5.10 Going Agile? Start with the Bus Matrix 179 5.11 Conformed Dimensions as the Foundation for Agile Data Warehousing 180 Integration Instead of Centralization 181 5.12 Integration for Real People 181 5.13 Build a Ready-to-Go Resource for Enterprise Dimensions 185 5.14 Data Stewardship 101: The First Step to Quality and Consistency 186 5.15 To Be or Not To Be Centralized 189 Contrast with the Corporate Information Factory 192 5.16 Differences of Opinion 193 5.17 Much Ado about Nothing 198 5.18 Don’t Support Business Intelligence with a Normalized EDW 199 5.19 Complementing 3NF EDWs with Dimensional Presentation Areas 201 6 Dimensional Modeling Fundamentals 203 Basics of Dimensional Modeling 203 6.1 Fact Tables and Dimension Tables 203 6.2 Drilling Down, Up, and Across 207 6.3 The Soul of the Data Warehouse, Part One: Drilling Down 210 6.4 The Soul of the Data Warehouse, Part Two: Drilling Across 213 6.5 The Soul of the Data Warehouse, Part Three: Handling Time 216 6.6 Graceful Modifications to Existing Fact and Dimension Tables 219 Dos and Don’ts 220 6.7 Kimball’s Ten Essential Rules of Dimensional Modeling 221 6.8 What Not to Do 223 Myths about Dimensional Modeling 226 6.9 Dangerous Preconceptions 226 6.10 Fables and Facts 228 7 Dimensional Modeling Tasks and Responsibilities 233 Design Activities 233 7.1 Letting the Users Sleep 233 7.2 Practical Steps for Designing a Dimensional Model 240 7.3 Staffing the Dimensional Modeling Team 243 7.4 Involve Business Representatives in Dimensional Modeling 244 7.5 Managing Large Dimensional Design Teams 246 7.6 Use a Design Charter to Keep Dimensional Modeling Activities on Track 248 7.7 The Naming Game 249 7.8 What’s in a Name? 250 7.9 When is the Dimensional Design Done? 253 Design Review Activities 254 7.10 Design Review Dos and Don’ts 255 7.11 Fistful of Flaws 257 7.12 Rating Your Dimensional Data Warehouse 260 8 Fact Table Core Concepts 267 Granularity 267 8.1 Declaring the Grain 267 8.2 Keep to the Grain in Dimensional Modeling 270 8.3 Warning: Summary Data May Be Hazardous to Your Health 272 8.4 No Detail Too Small 273 Types of Fact Tables 276 8.5 Fundamental Grains 277 8.6 Modeling a Pipeline with an Accumulating Snapshot 280 8.7 Combining Periodic and Accumulating Snapshots 282 8.8 Complementary Fact Table Types 284 8.9 Modeling Time Spans 286 8.10 A Rolling Prediction of the Future, Now and in the Past 289 8.11 Timespan Accumulating Snapshot Fact Tables 293 8.12 Is it a Dimension, a Fact, or Both? 294 8.13 Factless Fact Tables 295 8.14 Factless Fact Tables? Sounds Like Jumbo Shrimp? 298 8.15 What Didn’t Happen 299 8.16 Factless Fact Tables for Simplification 302 Parent-Child Fact Tables 304 8.17 Managing Your Parents 304 8.18 Patterns to Avoid When Modeling Header/Line Item Transactions 307 Fact Table Keys and Degenerate Dimensions 309 8.19 Fact Table Surrogate Keys 309 8.20 Reader Suggestions on Fact Table Surrogate Keys 310 8.21 Another Look at Degenerate Dimensions 312 8.22 Creating a Reference Dimension for Infrequently Accessed Degenerates 313 Miscellaneous Fact Table Design Patterns 314 8.23 Put Your Fact Tables on a Diet 314 8.24 Keeping Text Out of the Fact Table 316 8.25 Dealing with Nulls in a Dimensional Model 317 8.26 Modeling Data as Both a Fact and Dimension Attribute 318 8.27 When a Fact Table Can Be Used as a Dimension Table 319 8.28 Sparse Facts and Facts with Short Lifetimes 321 8.29 Pivoting the Fact Table with a Fact Dimension 323 8.30 Accumulating Snapshots for Complex Workflows 324 9 Dimension Table Core Concepts 327 Dimension Table Keys 327 9.1 Surrogate Keys 327 9.2 Keep Your Keys Simple 331 9.3 Durable “Super-Natural” Keys 333 Date and Time Dimension Considerations 334 9.4 It’s Time for Time 335 9.5 Surrogate Keys for the Time Dimension 337 9.6 Latest Thinking on Time Dimension Tables 339 9.7 Smart Date Keys to Partition Fact Tables 341 9.8 Updating the Date Dimension 342 9.9 Handling All the Dates 343 Miscellaneous Dimension Patterns 345 9.10 Selecting Default Values for Nulls 345 9.11 Data Warehouse Role Models 347 9.12 Mystery Dimensions 350 9.13 De-Clutter with Junk Dimensions 353 9.14 Showing the Correlation between Dimensions 354 9.15 Causal (Not Casual) Dimensions 356 9.16 Resist Abstract Generic Dimensions 359 9.17 Hot-Swappable Dimensions 360 9.18 Accurate Counting with a Dimensional Supplement 361 Slowly Changing Dimensions 363 9.19 Perfectly Partitioning History with Type 2 SCD 363 9.20 Many Alternate Realities 364 9.21 Monster Dimensions 367 9.22 When a Slowly Changing Dimension Speeds Up 370 9.23 When Do Dimensions Become Dangerous? 372 9.24 Slowly Changing Dimensions are Not Always as Easy as 1, 2, and 3 373 9.25 Slowly Changing Dimension Types 0, 4, 5, 6 and 7 378 9.26 Dimension Row Change Reason Attributes 382 10 More Dimension Patterns and Considerations 385 Snowflakes, Outriggers, and Bridges 385 10.1 Snowflakes, Outriggers, and Bridges 385 10.2 A Trio of Interesting Snowflakes 388 10.3 Help for Dimensional Modeling 392 10.4 Managing Bridge Tables 395 10.5 The Keyword Dimension 399 10.6 Potential Bridge (Table) Detours 403 10.7 Alternatives for Multi-Valued Dimensions 405 10.8 Adding a Mini-Dimension to a Bridge Table 407 Dealing with Hierarchies 409 10.9 Maintaining Dimension Hierarchies 409 10.10 Help for Hierarchies 414 10.11 Five Alternatives for Better Employee Dimensional Modeling 417 10.12 Avoiding Alternate Organization Hierarchies 425 10.13 Alternate Hierarchies 426 Customer Issues 427 10.14 Dimension Embellishments 427 10.15 Wrangling Behavior Tags 429 10.16 Three Ways to Capture Customer Satisfaction 431 10.17 Extreme Status Tracking for Real-Time Customer Analysis 435 Addresses and International Issues 439 10.18 Think Globally, Act Locally 439 10.19 Warehousing without Borders 443 10.20 Spatially Enabling Your Data Warehouse 448 10.21 Multinational Dimensional Data Warehouse Considerations 452 Industry Scenarios and Idiosyncrasies 453 10.22 Industry Standard Data Models Fall Short 453 10.23 An Insurance Data Warehouse Case Study 455 10.24 Traveling through Databases 460 10.25 Human Resources Dimensional Models 463 10.26 Managing Backlogs Dimensionally 467 10.27 Not So Fast 468 10.28 The Budgeting Chain 471 10.29 Compliance-Enabled Data Warehouses 475 10.30 Clicking with Your Customer 477 10.31 The Special Dimensions of the Clickstream 482 10.32 Fact Tables for Text Document Searching 485 10.33 Enabling Market Basket Analysis 489 11 Back Room ETL and Data Quality 495 Planning the ETL System 495 11.1 Surrounding the ETL Requirements 495 11.2 The 34 Subsystems of ETL 500 11.3 Six Key Decisions for ETL Architectures 504 11.4 Three ETL Compromises to Avoid 508 11.5 Doing the Work at Extract Time 510 11.6 Is Data Staging Relational? 513 11.7 Staging Areas and ETL Tools 517 11.8 Should You Use an ETL Tool? 518 11.9 Call to Action for ETL Tool Providers 521 11.10 Document the ETL System 522 11.11 Measure Twice, Cut Once 523 11.12 Brace for Incoming 527 11.13 Building a Change Data Capture System 530 11.14 Disruptive ETL Changes 531 11.15 New Directions for ETL 533 Data Quality Considerations 535 11.16 Dealing With Data Quality: Don’t Just Sit There, Do Something! 535 11.17 Data Warehouse Testing Recommendations 537 11.18 Dealing with Dirty Data 539 11.19 An Architecture for Data Quality 545 11.20 Indicators of Quality: The Audit Dimension 553 11.21 Adding an Audit Dimension to Track Lineage and Confi dence 556 11.22 Add Uncertainty to Your Fact Table 559 11.23 Have You Built Your Audit Dimension Yet? 560 11.24 Is Your Data Correct? 562 11.25 Eight Recommendations for International Data Quality 565 11.26 Using Regular Expressions for Data Cleaning 568 Populating Fact and Dimension Tables 572 11.27 Pipelining Your Surrogates 572 11.28 Unclogging the Fact Table Surrogate Key Pipeline 576 11.29 Replicating Dimensions Correctly 579 11.30 Identify Dimension Changes Using Cyclic Redundancy Checksums 580 11.31 Maintaining Back Pointers to Operational Sources 581 11.32 Creating Historical Dimension Rows 582 11.33 Facing the Re-Keying Crisis 585 11.34 Backward in Time 587 11.35 Early-Arriving Facts 590 11.36 Slowly Changing Entities 591 11.37 Using the SQL MERGE Statement for Slowly Changing Dimensions 593 11.38 Creating and Managing Shrunken Dimensions 595 11.39 Creating and Managing Mini-Dimensions 597 11.40 Creating, Using, and Maintaining Junk Dimensions 599 11.41 Building Bridges 601 11.42 Being Offl ine as Little as Possible 605 Supporting Real Time 606 11.43 Working in Web Time 606 11.44 Real-Time Partitions 610 11.45 The Real-Time Triage 613 12 Technical Architecture Considerations 617 Overall Technical/System Architecture 617 12.1 Can the Data Warehouse Benefi t from SOA? 617 12.2 Picking the Right Approach to MDM 619 12.3 Building Custom Tools for the DW/BI System 625 12.4 Welcoming the Packaged App 626 12.5 ERP Vendors: Bring Down Those Walls 629 12.6 Building a Foundation for Smart Applications 632 12.7 RFID Tags and Smart Dust 637 12.8 Is Big Data Compatible with the Data Warehouse? 640 12.9 The Evolving Role of the Enterprise Data Warehouse in the Era of Big Data Analytics 641 12.10 Newly Emerging Best Practices for Big Data 659 12.11 The Hyper-Granular Active Archive 670 Presentation Server Architecture 672 12.12 Columnar Databases: Game Changers for DW/BI Deployment 672 12.13 There is no Database Magic 673 12.14 Relating to OLAP 676 12.15 Dimensional Relational versus OLAP: The Final Deployment Conundrum 679 12.16 Microsoft SQL Server Comes of Age for Data Warehousing 682 12.17 The Aggregate Navigator 686 12.18 Aggregate Navigation with (Almost) No Metadata 690 Front Room Architecture 697 12.19 The Second Revolution of User Interfaces 697 12.20 Designing the User Interface 700 Metadata 704 12.21 Meta Meta Data Data 704 12.22 Creating the Metadata Strategy 708 12.23 Leverage Process Metadata for Self-Monitoring DW Operations 709 Infrastructure and Security Considerations 712 12.24 Watching the Watchers 712 12.25 Catastrophic Failure 716 12.26 Digital Preservation 719 12.27 Creating the Advantages of a 64-Bit Server 722 12.28 Server Configuration Considerations 723 12.29 Adjust Your Thinking for SANs 726 13 Front Room Business Intelligence Applications 729 Delivering Value with Business Intelligence 729 13.1 The Promise of Decision Support 730 13.2 Beyond Paving the Cow Paths 733 13.3 BI Components for Business Value 736 13.4 Big Shifts Happening in BI 738 13.5 Behavior: The Next Marquee Application 740 Implementing the Business Intelligence Layer 743 13.6 Three Critical Components for Successful Self-Service BI 743 13.7 Leverage Data Visualization Tools, But Avoid Anarchy 745 13.8 Think Like a Software Development Manager 747 13.9 Standard Reports: Basics for Business Users 748 13.10 Building and Delivering BI Reports 753 13.11 The BI Portal 757 13.12 Dashboards Done Right 759 13.13 Don’t Be Overly Reliant on Your Data Access Tool’s Metadata 760 13.14 Making Sense of the Semantic Layer 762 Mining Data to Uncover Relationships 764 13.15 Digging into Data Mining 764 13.16 Preparing for Data Mining 766 13.17 The Perfect Handoff 770 13.18 Get Started with Data Mining Now 774 13.19 Leverage Your Dimensional Model for Predictive Analytics 778 13.20 Does Your Organization Need an Analytic Sandbox? 779 Dealing with SQL 781 13.21 Simple Drill Across in SQL 781 13.22 An Excel Macro for Drilling Across 783 13.23 The Problem with Comparisons 785 13.24 SQL Roadblocks and Pitfalls 789 13.25 Features for Query Tools 792 13.26 Turbocharge Your Query Tools 794 13.27 Smarter Data Warehouses 798 14 Maintenance and Growth Considerations 805 Deploying Successfully 805 14.1 Don’t Forget the Owner’s Manual 805 14.2 Let’s Improve Our Operating Procedures 809 14.3 Marketing the DW/BI System 811 14.4 Coping with Growing Pains 812 Sustaining for Ongoing Impact 816 14.5 Data Warehouse Checkups 816 14.6 Boosting Business Acceptance 822 14.7 Educate Management to Sustain DW/BI Success 825 14.8 Getting Your Data Warehouse Back on Track 828 14.9 Upgrading Your BI Architecture 829 14.10 Four Fixes for Legacy Data Warehouses 831 14.11 A Data Warehousing Fitness Program for Lean Times 835 14.12 Enjoy the Sunset 839 15 Final Thoughts 841 Key Insights and Reminders 841 15.1 Final Word of the Day: Collaboration 841 15.2 Tried and True Concepts for DW/BI Success 843 15.3 Key Tenets of the Kimball Method 845 A Look to the Future 847 15.4 The Future is Bright 847 Article Index 853 Index 861

Offers a collection of recommended guidelines for data warehousing and business intelligence. Features articles covering the complete lifecycle of data warehousing, including project planning, requirements gathering, dimensional modeling, ETL, and business intelligence and analytics.-- Source other than Library of Congress

The Kimball Group reader : relentlessly practical tools for data warehousing and business intelligence