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我运行以下查询数小时，进行了各种更改，但想知道为什么 DETAIL 查询没有返回任何结果。我对其他连接也有类似的查询（FIRSTCONN、SECONDCONN、FOURTHCONN），它们运行得非常好，并在输出中显示所需的日期范围。谁能弄清楚可能是什么原因？

<cfquery datasource = "XX.XX.X.XX" name="master">
SELECT STR_TO_DATE(date_format(Timedetail,'%m-%d-%Y'),'%m-%d-%Y') as THIRDCONN,count(Timedetail) as THIRDOCCURANCES ,EVENTS 
FROM MyDatabase
WHERE EVENTS = "THIRD" 
GROUP BY THIRDCONN;
 </cfquery> 


  DUMP FOR THIRD MASTER <cfdump var = "#master#"> 





<cfquery dbtype="query" name="detail">
SELECT  *
FROM master 
WHERE THIRDCONN  >= <cfqueryparam value="#form.startdate#" cfsqltype="cf_sql_date"> 
AND THIRDCONN  <  <cfqueryparam value="#form.enddate#" cfsqltype="cf_sql_date">;
</cfquery>  


   DUMP FOR THIRD DETAIL <cfdump var = "#detail#">

PS 作为一个测试，我在详细查询中运行“SELECT * from master”，我得到了预期的主查询和详细查询相同的输出，但是当我在详细查询中提到日期参数时，它停止显示输出。但是，其他连接查询（FIRSTCONN、SECONDCONN、FOURTHCONN 等）并非如此

有没有其他方法可以运行此查询或我犯的任何错误？

转储给第三位大师

        THIRDCONN   THIRDOCCURANCES     EVENTS
   1   {ts '2013-06-06 00:00:00'}   10810   THIRD
2   {ts '2013-06-07 00:00:00'}  8076    THIRD
3   {ts '2013-06-10 00:00:00'}  25043   THIRD
4   {ts '2013-06-11 00:00:00'}  24754   THIRD
5   {ts '2013-06-12 00:00:00'}  14587   THIRD
6   {ts '2013-06-13 00:00:00'}  24828   THIRD
7   {ts '2013-06-14 00:00:00'}  23987   THIRD
8   {ts '2013-06-15 00:00:00'}  28027   THIRD
9   {ts '2013-06-16 00:00:00'}  25190   THIRD
10  {ts '2013-06-17 00:00:00'}  27255   THIRD
11  {ts '2013-06-18 00:00:00'}  22227   THIRD
12  {ts '2013-06-19 00:00:00'}  15951   THIRD
13  {ts '2013-06-20 00:00:00'}  21120   THIRD
14  {ts '2013-06-21 00:00:00'}  24214   THIRD
15  {ts '2013-06-22 00:00:00'}  22466   THIRD
16  {ts '2013-06-23 00:00:00'}  19881   THIRD
17  {ts '2013-06-24 00:00:00'}  23479   THIRD
18  {ts '2013-06-25 00:00:00'}  7879    THIRD

转储第三个细节

THIRDCONN 三次事件

4

3 回答 3

1

正如 Leigh 建议的那样，您的查询实际上是返回日期的字符串，而不是真实的日期。CF 在 QoQ 中存在混合数据类型的问题 - 第二个查询试图将日期与字符串进行比较，如您所述，这可能会产生不稳定的结果。

尝试将第一个查询更改为：

<cfquery datasource = "XX.XX.X.XX" name="master">
   SELECT Timedetail as THIRDCONN,count(Timedetail) as     THIRDOCCURANCES ,EVENTS 
   FROM MyDatabase
   WHERE EVENTS = "THIRD" 
   GROUP BY THIRDCONN;
</cfquery>
于 2013-07-24T03:42:44.997 回答
1

听起来NULL您的数据库中有一个值会抛出您的查询。尝试使用类似这样的方式运行查询

WHERE isNull(THIRDCONN,getDate())  >= <cfqueryparam value="#form.startdate#" cfsqltype="cf_sql_date"> 
AND isNull(THIRDCONN,getDate())<  <cfqueryparam value="#form.enddate#" cfsqltype="cf_sql_date">;

getDate()如果您有值，您可以使用任何日期值代替，NULL那么这将确认该问题。

于 2013-07-24T01:12:15.683 回答
0

嗯，我自己想通了。STR_TO_DATE这里的 SQL Query 中不需要函数。我只是使用DATE()函数来检索日期部分。另外，我注意到在使用DateFormat函数时指定掩码yyyy-mm-dd有助于冷融合，而不是指定任何其他格式。

感谢大家的帮助。赞赏。

工作代码：

<cfparam name="form.startdate" default="#DateFormat(dateAdd('d',-40,now()), 'yyyy-mm-dd')#">
<cfparam name="form.enddate" default="#DateFormat(dateAdd('d',-1,now()), 'yyyy-mm-dd')#">


<cfquery datasource = "XX.XX.X.XX" name="master">
SELECT DATE(Timedetail) as THIRDCONN,count(Timedetail) as THIRDOCCURANCES ,EVENTS 
FROM MyDatabase
WHERE EVENTS = "THIRD" 
GROUP BY THIRDCONN;
 </cfquery> 





<cfquery dbtype="query" name="detail">
SELECT  *
FROM master 
WHERE THIRDCONN  >= <cfqueryparam value="#form.startdate#" cfsqltype="cf_sql_date"> 
AND THIRDCONN  <  <cfqueryparam value="#form.enddate#" cfsqltype="cf_sql_date">;
</cfquery>
于 2013-07-24T17:30:33.337 回答