Database Challenges

-- File Name: Krzysztof_Lukowski_TSQLChallenge_15.sql
SELECT ROW, 
	CASE WHEN [1] = 1 THEN 'X' ELSE '' END AS [1], 
	CASE WHEN [2] = 1 THEN 'X' ELSE '' END AS [2], 
	CASE WHEN [3] = 1 THEN 'X' ELSE '' END AS [3], 
	CASE WHEN [4] = 1 THEN 'X' ELSE '' END AS [4], 
	CASE WHEN [5] = 1 THEN 'X' ELSE '' END AS [5], 
	CASE WHEN [6] = 1 THEN 'X' ELSE '' END AS [6], 
	CASE WHEN [7] = 1 THEN 'X' ELSE '' END AS [7], 
	CASE WHEN [8] = 1 THEN 'X' ELSE '' END AS [8], 
	CASE WHEN [9] = 1 THEN 'X' ELSE '' END AS [9] 
FROM (SELECT C.COL
	, R.ROW
	, CASE WHEN R.ROW % C.COL = 0 THEN 1 ELSE 0 END AS [MOD]
FROM @COLS AS C
CROSS JOIN @ROWS AS R) AS MODULO
PIVOT (SUM(MOD) FOR COL IN ([1], [2], [3], [4], [5], [6], [7], [8], [9])) AS PVT

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