mysql函數實例-統計1周內未登陸的用戶

mysql函數實例-統計月登陸用戶數   統計月使用用戶數，僅作備忘。  

Java代碼  
CREATE FUNCTION  statics_user_login_month() RETURNS int(11)  
    COMMENT '月使用用戶數\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;  
      
    #統計上月的食客登錄用戶  
    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');  
      
    #統計上月登錄用戶數  
    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