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From Don Albertson <>
Subject Re: help!! why UNION of multiple tables is not working
Date Tue, 12 Jul 2005 15:35:42 GMT wrote:
> Yes..I have. 
> I mean for example, when you do a simple query like this
> Select 1,2,3 UNION Select 4,5,6, it should display all rows for all
> select statements but it only displays 3,6.
>  I thought a UNION could be used for multiple tables with unrelated
> data, as long as am selecting the same fields or number of fields?

What happens if you replace the sql tags with scriptlet code that
creates a Connection, a Statement, executes the query text and returns the 
ResultSet?  Does that returned ResultSet contain what you expect?

> On 7/12/05, McCormack, Chris <> wrote:
>>Have you checked the row coming back from t2 exists in t1 also ? That would explain
only one row being returned.
>>-----Original Message-----
>>From: []
>>Sent: 12 July 2005 15:30
>>Subject: help!! why UNION of multiple tables is not working
>>I have Tomcat 5.0, Servlet 2.4, jstl and standard taglibs 1.1.
>>And all the required dependencies.
>>I want to get a UNION of multiple tables
>>so like
>>   <sql:query dataSource="" var="row">
>>SELECT name, user, addr from t1
>>SELECT name, user, addr from t2
>>However, the UNION of  multiple tables does not bring forth the right
>>result. It displays the last table fields. In this case, only
>>field in t2.
>>Is this a jstl and standard taglin issue or does this
>>have to do with the fact that I have mysql version 3.23?
>>I am still trying to understand how these taglibs work.
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