MySQL5.7递归查询

向下递归查询

SELECT ID,NAME,PARENT_ID,LEVEL_
	FROM(SELECT @ID AS _IDS,
	           (SELECT @ID := GROUP_CONCAT(ID)
					FROM TREE_TABLE 
				WHERE FIND_IN_SET(PARENT_ID,@ID) > 0
				AND REMOVE = 'N') T1,
				@L := @L + 1 AS LEVEL_
			FROM TREE_TABLE,
			(SELECT @ID := 'start', @L:= 0) T2
		   	WHERE @ID IS NOT NULL) T3,
           TREE_TABLE T4
   WHERE FIND_IN_SET(T4.ID,T3._IDS) > 0
ORDER BY T3.LEVEL_,T4.SORT

start为开始递归的父ID，LEVEL为层级，SORT为原来表里的排序字段。