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It is not working becuase CUSTBAL column does not exist in either cusomter and rep. you need to use derived table for the solution as :<br />
<br />
select CUSTOMER_NUM, CUSTOMER_NAME, &nbsp;CUSTBAL, REP.REP_NUM from (<br />
&nbsp;SELECT CUSTOMER_NUM, CUSTOMER_NAME, SUM(BALANCE) AS CUSTBAL, REP.REP_NUM FROM CUSTOMER, REP <br />
WHERE CUSTOMER.REP_NUM=REP.REP_N<wbr />UM &nbsp;GROUP BY CUSTOMER_NUM)<br />
as tblderived where (CUSTBAL&gt;10000)
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It is not working becuase CUSTBAL column does not exist in either cusomter and rep. you need to use derived table for the solution as :

select CUSTOMER_NUM, CUSTOMER_NAME,  CUSTBAL, REP.REP_NUM from (
 SELECT CUSTOMER_NUM, CUSTOMER_NAME, SUM(BALANCE) AS CUSTBAL, REP.REP_NUM FROM CUSTOMER, REP
WHERE CUSTOMER.REP_NUM=REP.REP_NUM  GROUP BY CUSTOMER_NUM)
as tblderived where (CUSTBAL>10000)

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I am receiving an invalid identifier for &quot;CUSTBAL&quot;... any ideas why? &nbsp;Thanks!<br />

<pre><code id="code-275102">SELECT CUSTOMER_NUM, CUSTOMER_NAME, SUM(BALANCE) AS CUSTBAL, REP.REP_NUM FROM CUSTOMER, REP WHERE CUSTOMER.REP_NUM=REP.REP_NUM AND (CUSTBAL&gt;10000) GROUP BY CUSTOMER_NUM;
</code></pre>
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I am receiving an invalid identifier for "CUSTBAL"... any ideas why?  Thanks!

Oracle SQL Question

Oracle is an object-relational database management system. It supports a large number of languages and application development frameworks. Its primary languages are SQL, PL/SQL and Java, but it also includes support for C and C++. Oracle also has its own enterprise modules and application server software.

Oracle Database

Enterprise software, also known as enterprise application software (EAS), is computer software used to satisfy the needs of an organization, including businesses, schools, interest-based user groups, clubs, charities, or governments. Services provided by enterprise software are typically business-oriented tools such as online shopping and online payment processing, interactive product catalogue, automated billing systems, security, enterprise content management, IT service management, customer relationship management (CRM), enterprise resource planning (ERP), business intelligence (BI), project management, human resource management (HR), manufacturing and supply chain management, enterprise application integration (EAI), and enterprise forms automation. Enterprise software is often available as a suite of customizable programs that require specialist capabilities.