Joe Celko's SQL Puzzles and Answers

ISBN-13: 9780123735966 / Angielski / Miękka / 2006 / 325 str.

Joe Celko

Opis

Joe Celko's SQL Puzzles and Answers, Second Edition, challenges you with his trickiest puzzles and then helps solve them with a variety of solutions and explanations. Author Joe Celko 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 also help develop the mindset needed to solve the many difficult SQL puzzles you face every day. This updated edition features many new puzzles; dozens of new solutions to puzzles; and new chapters on temporal query puzzles and common misconceptions about SQL and RDBMS that leads to problems. This book is recommended for database programmers with a good knowledge of SQL.

• A great collection of tricky SQL puzzles with a variety of solutions and explanations
• Uses the proven format of puzzles and solutions to provide a user-friendly, practical look into SQL programming problems - many of which will help users solve their own problems
• New edition features: Many new puzzles added , Dozens of new solutions to puzzles, and using features in SQL-99, Code is edited to conform to SQL STYLE rules, New chapter on temporal query puzzles, New chapter on common misconceptions about SQL and RDBMS that leads to problems

Spis treści

PUZZLE 01: FISCAL YEAR TABLES
PUZZLE 02: ABSENTEES
PUZZLE 03: THE ANESTHESIA PUZZLE
PUZZLE 04: SECURITY BADGES
PUZZLE 05: ALPHA DATA
PUZZLE 06: HOTEL RESERVATIONS
PUZZLE 07: KEEPING A PORTFOLIO
PUZZLE 08: SCHEDULING PRINTERS
PUZZLE 09: AVAILABLE SEATS PUZZLE
PUZZLE 10: WAGES OF SIN:
PUZZLE 11: WORK ORDER
PUZZLE 12: CLAIMS STATUS
PUZZLE 13: TEACHERS
PUZZLE 14: TELEPHONE
PUZZLE 15: FIND THE LAST TWO SALARIES
PUZZLE 16: MECHANICS
PUZZLE 17: EMPLOYMENT AGENCY
PUZZLE 18: JUNK MAIL
PUZZLE 19: TOP SALESMEN
PUZZLE 20: TEST RESULTS
PUZZLE 21: AIRPLANES AND PILOTS
PUZZLE 22: LANDLORD
PUZZLE 23: MAGAZINE
PUZZLE 24 ONE IN TEN
PUZZLE 25: MILESTONE
PUZZLE 26: DATAFLOW DIAGRAMS
PUZZLE 27: FINDING EQUAL SETS
PUZZLE 28: CALCULATE THE SINE FUNCTION
PUZZLE 29: FIND THE MODE COMPUTATION
PUZZLE 30: AVERAGE SALES WAIT

PUZZLE 31: BUYING ALL THE PRODUCTS
PUZZLE 32: COMPUTING TAXES
PUZZLE 33: COMPUTING DEPRECIATION
PUZZLE 34: CONSULTANT BILLING
PUZZLE 35: REQUISITIONS
PUZZLE 36: DOUBLE DUTY
PUZZLE 37: MOVING AVERAGE
PUZZLE 38: JOURNAL UPDATING
PUZZLE 39: INSURANCE LOSSES
PUZZLE 40: PERMUTATIONS:
PUZZLE 41: BUDGETING
PUZZLE 42: COUNTING FISH
PUZZLE 43: GRADUATION
PUZZLE 44: PAIRS OF STYLES
PUZZLE 45: PEPPERONI PIZZA
PUZZLE 46: SALES PROMOTIONS
PUZZLE 47: BLOCKS OF SEATS
PUZZLE 48: UN-GROUPING
PUZZLE 49: WIDGET COUNT
PUZZLE 50: TWO OF THREE
PUZZLE 51: BUDGET VERSUS ACTUAL
PUZZLE 52: PERSONNEL PROBLEM
PUZZLE 53: COLLAPSING A TABLE BY COLUMNS
PUZZLE 54: POTENTIAL DUPLICATES
PUZZLE 55: PLAYING THE PONIES
PUZZLE 56: HOTEL ROOM NUMBERS
PUZZLE 57: GAPS - 1
PUZZLE 58: GAPS - 2
PUZZLE 59: MERGING TIME PERIODS
PUZZLE 60: BARCODES
PUZZLE 61: SORTING A STRING
PUZZLE 62: REPORT FORMATTING
PUZZLE 63: CONTIGUOUS GROUPINGS
PUZZLE 64: BOXES
PUZZLE 65: AGE RANGES FOR PRODUCTS
PUZZLE 66: FOUR CONSECUTIVE ABSENCES
PUZZLE 67: STABLE MARRIAGES PROBLEM
PUZZLE 68: CATCHING THE NEXT BUS
PUZZLE 69: LIFO-FIFO INVENTORY
PUZZLE 70: STOCK TRENDS
PUZZLE 71: CALCULATIONS
PUZZLE 72: SCHEDULING SERVICE CALLS
PUZZLE 73: A LITTLE DATA SCRUBBING
PUZZLE 74: DERIVED TABLES OR NOT?
PUZZLE 75: FINDING A PUB

O autorze

Joe Celko served 10 years on ANSI/ISO SQL Standards Committee and contributed to the SQL-89 and SQL-92 Standards.

Mr. Celko is author a series of books on SQL and RDBMS for Elsevier/MKP. He is an independent consultant based in Austin, Texas.

He has written over 1200 columns in the computer trade and academic press, mostly dealing with data and databases.