mysql函数实例-统计月登陆用户数
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 doINSERT 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

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