使用Coldfusion循环查询

Question

我有一个包含companyID加上一些相关分数的表'scores'。公司ID可以在此表中多次出现。我有另一个表（'公司'），其中包含companyID和companyName。我想要做的是查询“公司”表以获取所有公司ID，然后使用此结果使用我先前查询的结果查询分数的“分数”表。我也需要做一些计算。我想我需要循环遍历第一个结果集并将companyID值放入我的第二个查询中。只是不知道如何做到这一点。任何帮助将不胜感激。

我知道这个代码将不能工作，但它可能给你什么，我试图完成一个感觉：

<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

有更好的方法来完成你所需要的，但我回答你的问题，因为你问它。我做了一些修改代码：

<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

有你可以做到这一点的几种方法，但下面的方式将工作。

<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> 

你也可以将你的两个查询结合在一起，所以你只需要一个整体查询，那将是首选的方法。

<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>