在一个sql文件中执行2个或更多查询时出现奇怪的结果

Question

我正在使用临时表

开发MySQL查询

这是查询：

CREATE TEMPORARY TABLE t1 (
SELECT closedcash.HOSTSEQUENCE ,tickets.TICKETID , 
RECEIPTS.DATENEW,PAYMENTS.PAYMENT, PAYMENTS.NOTES, PAYMENTS.TOTAL 

FROM PAYMENTS,RECEIPTS,closedcash,tickets

where CLOSEDCASH.MONEY = RECEIPTS.MONEY AND PAYMENTS.RECEIPT = RECEIPTS.ID 
and closedcash.HOSTSEQUENCE=230 and receipts.ID=tickets.ID

ORDER BY RECEIPTS.DATENEW

);


CREATE TEMPORARY TABLE t2 (
select TICKETID, DATENEW, timestampdiff(SECOND,prevdatenew,DATENEW) as "diff"
from (
    select TICKETID, DATENEW, @prevDateNew as prevdatenew, 
      @prevDateNew := DATENEW
    from t1 order by DATENEW
) t1     
);

UPDATE t2 SET diff =0 ORDER BY DATENEW ASC LIMIT 1;

SELECT
CONCAT(HOUR(t2.DATENEW), ':00-', HOUR(t2.DATENEW)+1, ':00') AS Hours ,
 SEC_TO_TIME( sum(diff) / count(t2.DATENEW) ) 
from t2
group BY CONCAT(HOUR(t2.DATENEW), ':00-', HOUR(t2.DATENEW)+1, ':00') 
order by t2.DATENEW ;

当我一个接一个地执行一个查询而不是一个文件时，它工作得很好，  但是当我将所有查询作为一个file.sql运行或者在sql编辑器中复制并粘贴phpmyadmin中的所有查询时，它显示null和零＆＃34;奇怪的结果，我不知道为什么????

以下是我一次执行一个查询时的良好结果的屏幕截图：

http://orasql.org/2012/04/28/a-funny-fact-about-collect/

以下是我从一个文件执行所有查询时的错误结果的屏幕截图：