Php 日期子问题

我的代码：

$song = mysql_query("SELECT COUNT(*) FROM `".$this->prefix."playlist`  
          WHERE `time` > DATE_SUB(CURRENT_TIMESTAMP, INTERVAL 20 MICROSECOND) 
          AND `long` < DATE_SUB(CURRENT_TIMESTAMP, INTERVAL 20 MICROSECOND)");
if(mysql_result($song, 0, 0) == 0)
{
  return "כלום";
} else {
  $query = mysql_query("SELECT * FROM `".$this->prefix."playlist`  
          WHERE `time` > DATE_SUB(CURRENT_TIMESTAMP, INTERVAL 20 MICROSECOND) 
          AND `long` < DATE_SUB(CURRENT_TIMESTAMP, INTERVAL 20 MICROSECOND)");
  $song = mysql_fetch_assoc($query);

  return $song["song"];
}

时间：

11:20

它返回：•לום而不是歌曲名

这是我的桌子：

CREATE TABLE IF NOT EXISTS `playlist` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `song` varchar(150) NOT NULL,
  `time` varchar(150) NOT NULL,
  `long` varchar(150) NOT NULL,
  `by` varchar(150) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=2 ;

--
-- Dumping data for table `playlist`
--

INSERT INTO `playlist` (`id`, `song`, `time`, `long`, `by`) VALUES
(1, 'till the worlds ends', '2011-06-04 11:40:10', '10', 'zRafael');

---

为了避免第二个查询，我会重新编写这个，这应该可以工作

再次更新-您的日期字段是VARCHAR，而不是DATETIME，因此我以前的查询不起作用

$rs = mysql_query("SELECT song FROM `".$this->prefix."playlist`  
   WHERE CAST(`time` AS DATETIME) >= NOW() 
   AND CAST(`long` AS DATETIME) < NOW()");
if (mysql_num_rows($rs) == 0)
  return "כלום";
else
  return mysql_result($rs, 0);

---

这样，您就不需要这些强制转换，您的数据库查找也会更快。

请提供一个数据示例，然后您的表模式显示CREATE table xxxxx我读对了吗？你说时间应该大于当前时间，并且在你的查询中，当前时间与歌曲的时间相同，这意味着条件不满足？不，我的意思是我们说歌曲开始于11:35，结束于11:40，现在是11:37，现在它没有带来任何空白。代码：$song=mysql\u querySELECT COUNT*FROM.$this->prefix.playlist`WHERE time>=NOW和time+longprefix.playlist WHERE time>=NOW和time+long$rs = mysql_query("SELECT song FROM `".$this->prefix."playlist` WHERE CAST(`time` AS DATETIME) >= NOW() AND CAST(`long` AS DATETIME) < NOW()"); if (mysql_num_rows($rs) == 0) return "כלום"; else return mysql_result($rs, 0);

ALTER TABLE `playlist` 
  MODIFY COLUMN `time` DATETIME NOT NULL
  , MODIFY COLUMN `long` DATETIME NOT NULL;