sql MAX列多列

Posted 2021-05-13

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SELECT MAX(n)
FROM (
	SELECT 1 AS a, 2 AS b, 3 AS c, 4 AS d, 5 AS e, 6 AS f, 7 AS g, 8 AS h, 9 AS i, 10 AS j
) AS sourceData
UNPIVOT (n FOR r IN (a,b,c,d,e,f,g,h,i,j)) AS u;

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