sql统计分组数
sql统计分组的组数
列1：

SELECT COUNT(*) from (SELECT * from enroll GROUP BY org_id) newtable;

列2:

		SELECT COUNT(0) FROM(SELECT member_id from li_store_flow WHERE(
        create_time BETWEEN '2022-06-01 00:00:00.0' AND '2022-07-06 23:59:59.999'
    ) GROUP BY member_id) newtable
SELECT

例子

查询攻击的类别数

SELECT
	"count" (*) 
FROM
	( SELECT event_type FROM internal_app_bsackc."event" 
	GROUP BY event_type ) AS a;