mySQL更新问题

嘿，我在尝试更新数据库中的表时遇到此错误：

每个派生表都必须有自己的别名

以下是我尝试更新的mysql查询：

 UPDATE (SELECT clientinfo.idNumber, clientinfo.theCompName, clientoffers.idNumber, 
 clientoffers.expTimeWaiting, clientoffers.theDateStart,
 clientoffers.theDateEnd, clientoffers.theOffer, clientoffers.isActive, 
 clientoffers.theType, clientoffers.fixedAmount, clientoffers.fixedUsed
 FROM clientinfo, clientoffers
 WHERE clientoffers.idNumber = clientinfo.idNumber
 AND clientoffers.theDateEnd >= '2010-06-03'
 AND clientoffers.theDateStart <= '2010-06-03'
 AND clientoffers.idNumber = 'NB351560'
 AND clientoffers.isActive = 'YES')
 SET clientoffers.fixedUsed = clientoffers.fixedUsed + 1

这似乎没问题，但不知什么原因似乎不起作用

任何帮助都会很好o

更新

这给了我一个错误 ODBC驱动程序不支持请求的属性

我正在使用Mysql 5.1和经典ASP

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大卫

客户服务商。在括号外无效，因此需要为select语句创建别名try UPDATE select。。。foo SET foo.fixedUsed=foo.fixedUsed+1

但是，一次更新一个表更简单：

UPDATE clientoffers
SET fixedUsed = fixedUsed + 1
WHERE
EXISTS (SELECT * FROM clientinfo WHERE
clientoffers.idNumber = clientinfo.idNumber)
AND clientoffers.theDatEnd >= '2010-06-03'
AND clientoffers.theDateStart <= '2010-06-03'
AND clientoffers.idNumber = 'NB351560'
AND clientoffers.isActive = 'YES

除此之外，根据MySQL版本，可能不支持EXISTS子查询语法。如果您是这样，您可以：

a。升级MySQL或切换到其他DB引擎

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B使用代码在循环中运行select，然后针对每个返回的行发出一条update语句，记住锁定两个表。

为什么会有select？这有必要吗

为什么不：

 UPDATE clientinfo, clientoffers

 SET clientoffers.fixedUsed = clientoffers.fixedUsed + 1

 WHERE clientoffers.idNumber = clientinfo.idNumber
 AND clientoffers.theDateEnd >= '2010-06-03'
 AND clientoffers.theDateStart <= '2010-06-03'
 AND clientoffers.idNumber = 'NB351560'
 AND clientoffers.isActive = 'YES'

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这样做会产生一个错误，即您无法从clauseI'm no ASP expert中指定更新的目标表'clientoffers'。虽然从外观上看，您正在尝试检索oRecordSet.open返回的行。update语句实际上并不返回行，因此您可能需要使用ado命令，因为它最终导致每个sql行末尾的&\出现问题。把那些拿出来，它工作得很好。谢谢Vin-G！：哦，对！您可能仍然可以通过在字符串ie和clientoffers中添加一个尾随空格来保留这些内容。不管怎样，不客气。

 UPDATE clientinfo, clientoffers

 SET clientoffers.fixedUsed = clientoffers.fixedUsed + 1

 WHERE clientoffers.idNumber = clientinfo.idNumber
 AND clientoffers.theDateEnd >= '2010-06-03'
 AND clientoffers.theDateStart <= '2010-06-03'
 AND clientoffers.idNumber = 'NB351560'
 AND clientoffers.isActive = 'YES'

 UPDATE clientoffers

 SET clientoffers.fixedUsed = clientoffers.fixedUsed + 1

 WHERE clientoffers.theDateEnd >= '2010-06-03'
 AND clientoffers.theDateStart <= '2010-06-03'
 AND clientoffers.idNumber = 'NB351560'
 AND clientoffers.isActive = 'YES'