mysql函数实例-统计月登陆用户数

luobo2ni

　　统计月使用用户数，仅作备忘。
　　

CREATE FUNCTION  statics_user_login_month() RETURNS int(11)
COMMENT '月使用用户数\r\n'
BEGIN
#Routine body goes here...
DECLARE stopFlag INT DEFAULT 0 ;
DECLARE _shop_id INT(11) DEFAULT 0;
DECLARE _device VARCHAR(50);
DECLARE _a_token CHAR(64) DEFAULT '-1';
DECLARE _s_token VARCHAR(64) DEFAULT NULL;
DECLARE _use_count INT(11) DEFAULT 0;
DECLARE _month_time date;
#统计上月的食客登录用户
DECLARE cur1 CURSOR FOR SELECT id, device, a_token, s_token FROM visitor_user
WHERE DATE_FORMAT(off_time, '%Y-%m') = DATE_FORMAT((curdate() - 1), '%Y-%m');
DECLARE CONTINUE HANDLER FOR NOT FOUND SET stopFlag=1;
OPEN cur1;
FETCH cur1 INTO _shop_id, _device, _a_token, _s_token;
WHILE  stopFlag = 0 do
INSERT INTO report_user_login_month_detail(id, shop_id, month_time, device, a_token, s_token)
VALUES (UUID(), _shop_id, DATE_FORMAT((curdate() - 1), '%Y-%m'), _device, _a_token, _s_token);
FETCH cur1 INTO _shop_id, _device, _a_token, _s_token;
END WHILE;
CLOSE cur1;
set _month_time = DATE_FORMAT((curdate() - 1), '%Y-%m');
#统计上月登录用户数
SELECT COUNT(device) INTO _use_count FROM visitor_user
WHERE DATE_FORMAT(off_time, '%Y-%m') = _month_time;
INSERT INTO report_user_login_month(id, month_time, use_count, type_client)
VALUES(UUID(), _month_time, _use_count, 0);
RETURN 1;
END