Joe Celko's SQL Puzzles and AnswersJoe 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.
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A1.category algorithm Answer AnthologyContributors barcode batch_nbr cat_1 cat_2 cat_3 Celko city2 claim status clause column CompuServe constraint COUNT(DISTINCT CREATE TABLE CREATE VIEW CURRENT_TIMESTAMP database DATE NOT NULL emp_name employee end_date EXISTS SELECT floor_nbr Foobar Francisco Moreno GROUP Husband S Husband INNER JOIN INSERT INSERT INSERT INSERT INTO Husbands INSERT INTO Policy_Criteria INSERT INTO Wives INTEGER NOT NULL inventory item_a job_id Joe Celko keycol LEFT OUTER JOIN look MAX(CASE mech_type month_cnt N1.name NULL CHECK NULL END NULL PRIMARY KEY NULL REFERENCES OLAP order_nbr P1.pen_year pen_year Personnel Policy_Criteria VALUES portfolio predicate problem procedure PUZZLE Qty_on_hand query room_nbr rows S1.sal_date sal_date Salaries Sales scalar subquery SELECT COUNT SELECT DISTINCT self-join Sequence ServicesSchedule solution SP1.sno STABLE MARRIAGES PROBLEM stand_nbr start_date step_status StockHistory string student_name subquery SupParts Sybase T-SQL Timesheets trick UPDATE VALUES VALUES VALUES WATCOM WidgetInventory Wife_perms Wives VALUES Wives Wives Wives
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