使用PHP和比较日期时间数据从MYSQL检索记录
我的MYSQL表如下:使用PHP和比较日期时间数据从MYSQL检索记录,php,mysql,Php,Mysql,我的MYSQL表如下: id record_nr timestamp 1 931 2014-02-15 6:21:00 2 577 2013-05-03 0:19:00 3 323 2012-08-07 11:26:00 $dateTimeString = "2013-07-28 7:23:34"; $query = "SELECT * FROM mytable "; $query .= "WHERE time
id record_nr timestamp
1 931 2014-02-15 6:21:00
2 577 2013-05-03 0:19:00
3 323 2012-08-07 11:26:00
$dateTimeString = "2013-07-28 7:23:34";
$query = "SELECT * FROM mytable ";
$query .= "WHERE timestamp <= STR_TO_DATE('".$dateTimeString."', '%H:%i:%s')";
$query .= " ORDER BY timestamp DESC LIMIT 1";
在PHP中,我尝试通过如下比较时间来检索记录:
id record_nr timestamp
1 931 2014-02-15 6:21:00
2 577 2013-05-03 0:19:00
3 323 2012-08-07 11:26:00
$dateTimeString = "2013-07-28 7:23:34";
$query = "SELECT * FROM mytable ";
$query .= "WHERE timestamp <= STR_TO_DATE('".$dateTimeString."', '%H:%i:%s')";
$query .= " ORDER BY timestamp DESC LIMIT 1";
$dateTimeString=“2013-07-28 7:23:34”;
$query=“从mytable中选择*”;
$query.=“其中时间戳下面的代码可能会有帮助:
$dateTimeString = '2016-12-27 12:59:46';
$query = "SELECT * FROM `mytable`
WHERE `TIMESTAMP` <= '".$dateTimeString."'
ORDER BY TIMESTAMP DESC LIMIT 1";
$dateTimeString='2016-12-27 12:59:46';
$query=“从'mytable'中选择*
其中'TIMESTAMP`我改为
$query .= "WHERE timestamp <= '".$dateTimeString."'";
$query.=“WHERE timestamp由于您只比较日期部分,您还需要比较时间戳的->”WHERE date(timestamp)注意,OP有@sean感谢您的更正。我已经编辑了我的代码。对不起,我需要澄清一下。我不需要精确匹配。我只想选择最接近$dateTimeString的记录,不要超过那个时间。谢谢你的帮助。