Puzzle 18 Seating Chart #13
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maximilian22x
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Thank you, I will check out this syntax. This puzzle was originally in Joe Celko's SQL Puzzle and Answer book, which is where I learned how to solve this puzzle. Thank you for letting me know of all the small errors in the puzzles. Really appreciate it. Please keep them coming. |
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AdvancedSQLPuzzles/Advanced SQL Puzzles/Advanced SQL Puzzles Solutions.sql
Line 828 in 66533d0
** Also possible, but your version is better.**
WITH cte_Gaps AS
(
SELECT SeatNumber AS GapStart,
LEAD(SeatNumber,1,0) OVER (ORDER BY SeatNumber) AS GapEnd,
LEAD(SeatNumber,1,0) OVER (ORDER BY SeatNumber) - SeatNumber AS Gap
FROM #SeatingChart
)
SELECT sum((GapEnd - 1 ) - (GapStart + 1 ) + 1)
FROM cte_Gaps
WHERE Gap > 1;
GO
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