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Joe Celko's SQL puzzles & answers (engelsk)

Del af Morgan Kaufmann series in data management systems

Joe Celko

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Summary: In this complete revision and expansion of his first SQL Puzzles book, Joe Celko challenges you with his trickiest puzzles-and then helps solve them with a variety of solutions and explanations. Joe demonstrates the thought processes that are involved in attacking a problem from an SQL perspective to help advanced database programmers solve the puzzles you frequently face. These techniques not only help with the puzzle at hand, but help develop the mindset needed to solve the many difficult SQL puzzles you face every day. Of course, part of the fun is to see whether or not you can write better.

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Front Cover; Joe Celko's Sql Puzzles & Answers; Copyright Page; CONTENTS; Introduction; Acknowledgments, Corrections, and Future Editions; Part: Puzzle; Chapter 1. Fiscal Year Tables; Chapter 2. Absentees; Chapter 3. The Anesthesia Puzzle; Chapter 4. Security Badges; Chapter 5. Alpha Data; Chapter 6. Hotel Reservations; Chapter 7. Keeping A Portfolio; Chapter 8. Scheduling Printers; Chapter 9. Available Seats; Chapter 10. Wages of Sin; Chapter 11. Work Orders; Chapter 12. Claims Status; Chapter 13. Teachers; Chapter 14. Telephone; Chapter 15. Find The Last Two Salaries; Chapter 16. Mechanics ; Chapter 17. Employment AgencyChapter 18. Junk Mail; Chapter 19. Top Salespeople; Chapter 20. Test Results; Chapter 21. Airplanes And Pilots; Chapter 22. Landlord; Chapter 23. Magazine; Chapter 24. One In Ten; Chapter 25. Milestone; Chapter 26. Dataflow Diagrams; Chapter 27. Finding Equal Sets; Chapter 28. Calculate The Sine Function; Chapter 29. Find The Mode Computation; Chapter 30. Average Sales Wait; Chapter 31. Buying All The Products; Chapter 32. Computing Taxes; Chapter 33. Computing Depreciation; Chapter 34. Consultant Billing; Chapter 35. Inventory Adjustments; Chapter 36. Double Duty ; Chapter 37. A Moving AverageChapter 38. Journal Updating; Chapter 39. Insurance Losses; Chapter 40. Permutations; Chapter 41. Budgeting; Chapter 42. Counting Fish; Chapter 43. Graduation; Chapter 44. Pairs Of Styles; Chapter 45. Pepperoni Pizza; Chapter 46. Sales Promotions; Chapter 47. Blocks Of Seats; Chapter 48. Ungrouping; Chapter 49. Widget Count; Chapter 50. Two Of Three; Chapter 51. Budget Versus Actual; Chapter 52. Personnel Problem; Chapter 53. Collapsing A Table By Columns; Chapter 54. Potential Duplicates; Chapter 55. Playing The Ponies; Chapter 56. Hotel Room Numbers ; Chapter 57. Gaps-version OneChapter 58. Gaps-version Two; Chapter 59. Merging Time Periods; Chapter 60. Barcodes; Chapter 61. Sort A String; Chapter 62. Report Formatting; Chapter 63. Contiguous Groupings; Chapter 64. Boxes; Chapter 65. Age Ranges For Products; Chapter 66. Sudoku; Chapter 67. Stable Marriages Problem; Chapter 68. Catching The Next Bus; Chapter 69. Lifo-fifo Inventory; Chapter 70. Stock Trends; Chapter 71. Calculations; Chapter 72. Scheduling Service Calls; Chapter 73. A Little Data Scrubbing; Chapter 74. Derived Tables Or Not?; Chapter 75. Finding A Pub; Index ; About the Author