Question

查询1

    SELECT SessionInfo.IVRSessionInfoID         
    FROM SessionInfo 
     WHERE SessionCallTime BETWEEN UNIX_TIMESTAMP('2013-08-01 00:00:00') 
        AND UNIX_TIMESTAMP('2013-08-01 23:59:59')
    ORDER BY SessionInfo.SessionCallTime DESC;

QUERY2

          SELECT SessionInfo.IVRSessionInfoID         
          FROM SessionInfo 
         WHERE (SessionInfo.SessionCallTime BETWEEN '2013-08-01 00:00:00'
                                         AND  '2013-08-01 23:59:59')
          ORDER BY SessionInfo.SessionCallTime DESC;

为什么第一个查询给出0行的差异是什么第二个查询给出记录

在这两个日期之间的20000行

表架构

    CREATE TABLE `SessionInfo` (
    `IVRSessionInfoID` bigint(8) unsigned NOT NULL AUTO_INCREMENT,
   `SessionCallTime` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
   `MGServerIP` varchar(15) NOT NULL,
   `MGServerPort` smallint(2) unsigned NOT NULL DEFAULT '5060',
    `SessionUniqueID` varchar(64) NOT NULL,
   `ANI` varchar(20) NOT NULL,
  `CountryID` int(4) unsigned DEFAULT NULL,
  `CountryStateAreaID` int(4) unsigned DEFAULT NULL,
 `AccessNumberProviderLogID` int(4) unsigned DEFAULT NULL,
 `AccessNumberLogID` int(4) unsigned DEFAULT NULL,
    `AccessRestrictionLogID` int(4) unsigned DEFAULT NULL,
`SubscriberCardID` bigint(8) unsigned DEFAULT NULL,
  `SessionDuration` int(4) unsigned NOT NULL,
`SessionRNDDuration` int(4) unsigned NOT NULL,
 `TotalCharge` decimal(15,6) unsigned NOT NULL,
`RuleSetLogID` int(4) unsigned DEFAULT NULL,
`RuleSetChargeInfoLogID` int(4) unsigned DEFAULT NULL,
`RuleSetRNDDuration` int(4) unsigned NOT NULL,
`RuleSetTotalCharge` decimal(15,6) unsigned NOT NULL,
 PRIMARY KEY (`IVRSessionInfoID`),
   UNIQUE KEY `UNIQUE` (`SessionUniqueID`),
   KEY `SessionCallTime` (`SessionCallTime`),
   KEY `ANI` (`ANI`),
   KEY `CountryID` (`CountryID`),
    KEY `CountryStateAreaID` (`CountryStateAreaID`),
  KEY `AccessNumberProviderLogID` (`AccessNumberProviderLogID`),
  KEY `AccessNumberLogID` (`AccessNumberLogID`),
   KEY `AccessRestrictionLogID` (`AccessRestrictionLogID`),
  KEY `SubscriberCardID` (`SubscriberCardID`),

   ) ENGINE=InnoDB AUTO_INCREMENT=22199955 DEFAULT CHARSET=latin1 ROW_FORMAT=COMPACT;

Answer 1

这个问题可能更适合DBA交换...

...但我的猜测是因为UNIX_TIMESTAMP('anything')返回int/decimal/number而'2013-08-01 23:59:59'是某种数据库DateTime数据类型的格式。

EG：SessionInfo.SessionCallTime不使用与UNIX_TIMESTAMP()兼容的数据类型。

为什么查询给出0行

1 个答案: