Mysql timeline data to obtain the first three data of the same day

CREATE TABLE `praise_info` (
 `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'ID',
 `pic_id` varchar(64) DEFAULT NULL COMMENT 'Picture ID',
 `created_time` datetime DEFAULT CURRENT_TIMESTAMP COMMENT 'Creation time',
PRIMARY KEY (`id`),
 KEY `pic_id` (`pic_id`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=3647 DEFAULT CHARSET=utf8 COMMENT='Picture table';

SELECT * FROM
(
SELECT *, @num := if(@created_time = DATE_FORMAT(created_time, '%Y-%m-%d'), @num := @num + 1, 1) as row_num,
@created_time := DATE_FORMAT(created_time, '%Y-%m-%d') as axisTime FROM praise_info
order by id desc
) AS temp
WHERE row_num < 3;

DROP PROCEDURE IF EXISTS pro_dim_date;
tudou@Gyyx
CREATE PROCEDURE pro_dim_date(IN bdate DATE,IN edate DATE)
BEGIN
DECLARE var DATE DEFAULT bdate;
DECLARE evar DATE DEFAULT DATE_ADD(edate,INTERVAL 1 DAY);
DECLARE bweek DATE;
DECLARE eweek DATE;
WHILE var < evar DO
SET bweek = DATE_ADD(DATE_SUB(var,INTERVAL 1 WEEK),INTERVAL 1 DAY);
SET eweek = DATE_SUB(DATE_ADD(var,INTERVAL 1 WEEK),INTERVAL 1 DAY);
INSERT INTO gyyx_report.dim_date
(
`date_id`,
`date_name`,
`date_of_month`,
`year_id`,
`year_name`,
`quarter_id`,
`quarter_name`,
`month_id`,
`month_name`,
`month_of_year_name`,
`month_of_year_id`,
`week_id`,
`week_name`,
`week_of_year_id`,
`week_of_year_name`,
`is_weekend`
)
VALUES
(
DATE_FORMAT(var,'%Y%m%d'),
DATE_FORMAT(var,'%Y-%m-%d'),
DAYOFMONTH(var),
YEAR(var),
CONCAT(YEAR(var),'年'),
QUARTER(var),
CONCAT(QUARTER(var),'quarter'),
DATE_FORMAT(var,'%Y%m'),
CONCAT(YEAR(var),'year',MONTH(var),'month'),
CONCAT(MONTH(var),'Month'),
MONTH(var),
WEEKDAY(var),
CASE WEEKDAY(var) WHEN 0 THEN 'Monday' WHEN 1 THEN 'Tuesday' WHEN 2 THEN 'Wednesday' WHEN 3 THEN 'Thursday' WHEN 4 THEN 'Friday' WHEN 5 THEN 'Saturday' WHEN 6 THEN 'Sunday' END,
WEEKOFYEAR(var),
CONCAT('第',WEEKOFYEAR(var),'周(',MONTH(bweek),'月',DAY(bweek),'日~',MONTH(eweek),'月',DAY(eweek),'日'),
CASE WHEN WEEKDAY(var)>4 THEN 'Yes' ELSE 'No' END
);
SET var=DATE_ADD(var,INTERVAL 1 DAY);
END WHILE;
END

CALL pro_dim_date('2005-01-01','2013-12-31')

: : : : : : : : : : : : : : :

CREATE TABLE `dim_date` (
  `date_id` int(11) NOT NULL COMMENT '20110512',
  `date_name` varchar(16) DEFAULT NULL COMMENT '2011-05-12',
  `date_of_month` int(11) DEFAULT NULL COMMENT '12',
  `year_id` int(11) DEFAULT NULL COMMENT '2011',
  `year_name` varchar(16) DEFAULT NULL COMMENT '2011',
  `quarter_id` int(11) DEFAULT NULL COMMENT '2',
  `quarter_name` varchar(16) DEFAULT NULL COMMENT '2季',
  `month_id` int(11) DEFAULT NULL COMMENT '5',
  `month_name` varchar(16) DEFAULT NULL COMMENT 'May',
  `month_of_year_name` varchar(16) DEFAULT NULL COMMENT 'May 2011',
  `month_of_year_id` int(11) DEFAULT NULL COMMENT '201105',
  `week_id` int(11) DEFAULT NULL,
  `week_name` varchar(16) DEFAULT NULL,
  `week_of_year_id` int(11) DEFAULT NULL,
  `week_of_year_name` varchar(32) DEFAULT NULL,
  `is_weekend` enum('No','Yes') DEFAULT NULL COMMENT 'Is it the weekend',
  PRIMARY KEY (`date_id`),
  KEY `ix_dim_date_date_name` (`date_name`),
  KEY `ix_dim_date_month_id` (`month_id`),
  KEY `ix_dim_date_year_id` (`year_id`),
  KEY `ix_dim_date_quanter_id` (`quarter_id`),
  KEY `ix_dim_date_week_of_year_id` (`week_of_year_id`,`week_of_year_name`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1