mysql统计用户七日留存存储过程

begin
declare i int;
declare numareaId int(10);
declare currentareaId int(10);
SELECT COUNT(areaId),MIN(areaId) INTO @a,@b FROM option_area_info;

SET numareaId=@a;
SET currentareaId=@b;

loop1:WHILE numareaId>0 DO
SET @AID = currentareaId;






SET i=1;
while i<8 do
if exists(select * from statistics_player_l where createTime>=date_sub(curdate(),interval i day) and createTime=date_add(date_sub(curdate(),interval i day),interval 1 day) and loginTime=date_sub(curdate(),interval i day) and createTime=date_add(date_sub(curdate(),interval i day),interval 2 day) and loginTime=date_sub(curdate(),interval i day) and createTime=date_add(date_sub(curdate(),interval i day),interval 3 day) and loginTime=date_sub(curdate(),interval i day) and createTime=date_add(date_sub(curdate(),interval i day),interval 4 day) and loginTime=date_sub(curdate(),interval i day) and createTime=date_add(date_sub(curdate(),interval i day),interval 5 day) and loginTime=date_sub(curdate(),interval i day) and createTime=date_add(date_sub(curdate(),interval i day),interval 6 day) and loginTime=date_sub(curdate(),interval i day) and createTime=date_add(date_sub(curdate(),interval i day),interval 7 day) and loginTime=date_sub(curdate(),interval i day) and createTime