oracle 选取出现次数最多的前５条数据

标签：des   style   blog   class   code   strong   

SELECT
	*
FROM
	(
		SELECT
			PROJECT_LISTING.MATERIAL,
			COUNT (*) AS "出现次数"
		FROM
			PROJECT_LISTING
		WHERE
			PROJECT_LISTING.MATERIAL IS NOT NULL
		GROUP BY
			PROJECT_LISTING.MATERIAL
		ORDER BY
			COUNT (*) DESC
	) WHERE　ROWNUM <= 5

	ORDER BY
			COUNT (*) DESC　是关键排序

COUNT (*) AS "出现次数"　　这个可以不写，只是为了看的明白

oracle 选取出现次数最多的前５条数据,布布扣,bubuko.com

oracle 选取出现次数最多的前５条数据

标签：des   style   blog   class   code   strong   

原文地址：http://blog.csdn.net/hjm4702192/article/details/25292045