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<pre><code class="code-1 nolinks" id="code-20-42437940-1"> SELECT u.`email`, u.`LastName` 
 FROM Client_Scores cs
 LEFT JOIN Users u
 ON cs.UserID = u.UserID
</code></pre>
 
Since a user with no score record would mean they haven't taken the test, return only those who have taken the test and matching user
</div>

<div>
i think that's working 
will try more after lunch 
 
many thanks 
 
michael
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<div>
Thanks for the points! 
 
I was very tempted to use the rare RIGHT JOIN syntax since the SELECT fields where from Users and it might have looked nicer being that the fields would have come from the FROM table; however, I figured LEFT JOIN would be most acceptable. In case you wanted to see the alternate form: 
 

<pre><code class="code-1 nolinks" id="code-20-42437989-1"> SELECT u.`email`, u.`LastName` 
 FROM Users u
 RIGHT JOIN Client_Scores cs
 ON u.UserID = cs.UserID 
 WHERE cs.YourType IS NOT NULL
</code></pre>
 
Lastly, and possibly the BEST syntax in your case, would be as follows: if a Client_Score exists for a User that doesn't exist (say a deleted user) the other queries would return such an orphaned record; to prevent this issue, you could use an INNER JOIN as an alternative (to require that a User AND a Score records exist). 
 
(Recommended) 
 

<pre><code class="code-1 nolinks" id="code-20-42437989-2"> SELECT u.`email`, u.`LastName` 
 FROM Users u
 INNER JOIN Client_Scores cs
 ON u.UserID = cs.UserID 
 WHERE cs.YourType IS NOT NULL
</code></pre>
 
<a href="https://filedb.experts-exchange.com/incoming/2018/01_w03/1220332/sql-joins.jpg" target="_blank" title="sql-joins (143 KB)"><img alt="sql-joins" class="file-block lazyload" style="max-width: 800px;" data-src="https://filedb.experts-exchange.com/incoming/2018/01_w03/800_1220332/sql-joins.jpg" /></a>
</div>

sql-joins.jpg

<div>
<div class="content wysiwyg-content">
Hi, 
 
How do I join these two databases? 
 
db1: Visitors 
Table: Users 
This table contains all users on the system. &nbsp;each one has a unique &quot;UserID&quot; 
 
 
db2: &nbsp;PT_UserData 
Table: Client_Scores 
This table contains only those users who have completed a test 
If they complete a test, the field &quot;YourType&quot; IS NOT NULL 
All rows contain the field &quot;UserID&quot; 
 
 
Both tables have &quot;UserID&quot; in common 
 
I'm looking to output those users who have completed the test, but I need their Email and LastName which is in the Users table
</div>
</div>

Hi,

How do I join these two databases?

db1: Visitors
Table: Users
This table contains all users on the system.  each one has a unique "UserID"


db2:  PT_UserData
Table: Client_Scores
This table contains only those users who have completed a test
If they complete a test, the field "YourType" IS NOT NULL
All rows contain the field "UserID"


Both tables have "UserID" in common

I'm looking to output those users who have completed the test, but I need their Email and LastName which is in the Users table

How do I join these two separate databases in ColdFusion

Databases are organized collections of data, most commonly accessed through management systems including schemas, tables, queries and processes that allow users to enter and manipulate the information or utilize it in other fashions, such as with web applications or for reporting purposes.

Databases

ColdFusion is a server-side rapid application development platform originally created by Allaire and now sold by Adobe, implementing the dynamic general purpose CFML programming language. The term ColdFusion is sometimes colloquially used to refer to the CFML language (Cold Fusion Markup Language), but can also include discussions of the server software implementation. ColdFusion runs using a customised version of Apache Tomcat. Earlier versions are bundled with JRun.

ColdFusion Language

SQL (Structured Query Language) is designed to be used in conjunction with relational database products as of a means of working with sets of data. SQL consists of data definition, data manipulation, and procedural elements. Its scope includes data insert, query, update and delete, schema creation and modification, and data access control.