以下cfquery結果讓我瘋狂

Question

我正在運行以下查詢很多小時，做了各種更改，但想知道爲什麼DETAIL Query沒有返回任何結果。對於其他連接（FIRSTCONN，SECONDCONN，FOURTHCONN），我也有類似的疑問，它們運行得非常好，並在輸出中顯示期望的日期範圍。誰能弄清楚可能是什麼原因？

<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#"> 

P.S.就像測試一樣，我在詳細查詢中運行了「SELECT * from master」，我得到了預期的主查詢和詳細查詢的相同輸出，但是當我在詳細查詢中提到日期參數時，它會停止顯示輸出。但是，其他連接查詢（FIRSTCONN，SECONDCONN，FOURTHCONN等）的情況不是這樣的

是否有任何其他方式可以運行此查詢或我所做的任何錯誤？

DUMP第三MASTER

 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 

轉儲第三細節

THIRDCONN THIRDOCCURANCES活動

Answer 1

聽起來像是你在你的數據庫中的NULL值是擺脫查詢。試着用一些運行查詢像這樣

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

在這裏你可以代替getDate()，如果你有NULL值，那麼這將確認該問題使用任何日期值。

Answer 2

正如Leigh所說，您的查詢實際上是爲日期返回一個字符串，而不是實際的日期。 CF在QoQ中存在混合數據類型的問題 - 第二個查詢嘗試將日期與字符串進行比較，如您所記下的那樣，這可能會產生不可思議的結果。

嘗試改變第一查詢：

<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> 

Answer 3

好吧，我想通了，我自己的。這裏SQL查詢中不需要STR_TO_DATE函數。我只是用DATE()函數來檢索日期部分。另外，我注意到，在使用DateFormat函數時指定掩碼對於Coldfusion有幫助，而不是指定任何其他格式。

感謝大家的幫助。讚賞。

工作代碼：

<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>