使用Coldfusion循環查詢

Question

我有一個包含companyID加上一些相關分數的表'scores'。公司ID可以在此表中多次出現。我有另一個表（'公司'），其中包含companyID和companyName。我想要做的是查詢「公司」表以獲取所有公司ID，然後使用此結果使用我先前查詢的結果查詢分數的「分數」表。我也需要做一些計算。我想我需要循環遍歷第一個結果集並將companyID值放入我的第二個查詢中。只是不知道如何做到這一點。任何幫助將不勝感激。

我知道這個代碼將不能工作，但它可能給你什麼，我試圖完成一個感覺：

<cfquery name="companyIDs" datasource="myDB"> 
    Select companyID from company 
</cfquery> 

<cfloop> 
<cfquery name="companyScore" datasource="myDB"> 
SELECT Round(sum(leadership)/Count(leadership)) as leadership, 
Round(sum(communication)/Count(communication)) as communication, 
Round(sum(fairness)/Count(fairness)) as fairness, 
Round(sum(ethics)/Count(ethics)) as ethics, 
Round(sum(competence)/Count(competence)) as competence 
FROM scores 
Where companyID = 'companyIDs.companyID' 
</cfquery> 
</cfloop> 

比

Answer 1

有更好的方法來完成你所需要的，但我回答你的問題，因爲你問它。我做了一些修改代碼：

<cfloop query='companyIDs'> // add the name of your query to the cloop 
<cfquery name="companyScore" datasource="myDB"> 
SELECT Round(sum(leadership)/Count(leadership)) as leadership, 
Round(sum(communication)/Count(communication)) as communication, 
Round(sum(fairness)/Count(fairness)) as fairness, 
Round(sum(ethics)/Count(ethics)) as ethics, 
Round(sum(competence)/Count(competence)) as competence 
FROM scores 
Where companyID = '#companyIDs.companyID#' // add ## around your output 
</cfquery> 

<cfdump var='#companyScore#'> // dump your results 

</cfloop> 

Answer 2

有你可以做到這一點的幾種方法，但下面的方式將工作。

<cfquery name="companyIDs" datasource="myDB"> 
Select companyID from company 
</cfquery> 

<cfloop query="companyIDs"> 
<cfquery name="companyScore" datasource="myDB"> 
SELECT Round(sum(leadership)/Count(leadership)) as leadership, 
Round(sum(communication)/Count(communication)) as communication, 
Round(sum(fairness)/Count(fairness)) as fairness, 
Round(sum(ethics)/Count(ethics)) as ethics, 
Round(sum(competence)/Count(competence)) as competence 
FROM scores 
Where companyID = #companyIDs.companyID# 
</cfquery> 
</cfloop> 

你也可以將你的兩個查詢結合在一起，所以你只需要一個整體查詢，那將是首選的方法。

<cfquery name="companyScore" datasource="myDB"> 
SELECT companyID, 
Round(sum(leadership)/Count(leadership)) as leadership, 
Round(sum(communication)/Count(communication)) as communication, 
Round(sum(fairness)/Count(fairness)) as fairness, 
Round(sum(ethics)/Count(ethics)) as ethics, 
Round(sum(competence)/Count(competence)) as competence 
FROM scores INNER JOIN company ON scores.companyID = company.companyID 
GROUP BY companyID 
</cfquery>