Using '(' and less than operator in an xsql page sql query

Question

Dear All,
I tried to use left parenthesis '(' and less than operator in an sql query through an xsql page, it doesn't let to use them.
Do you know how to use those in an xsql page?
Thanks for your help.
Mustafa

Answer 1

Following is the xsql page that I tried to run:
<?xml version="1.0"?>
<xsql:query xmlns:xsql="urn:oracle-xsql" connection = "bib" rowset-element="bib" row-element="book">
(SELECT year,title,last,first,' ' as affiliation,publisher,price
FROM book,author
WHERE year=2001 and bookid=parentid
UNION
SELECT year,title,last,first,affiliation,publisher,price
FROM book,editor
WHERE year=2001 and bookid=parentid)
INTERSECT
(SELECT year,title,last,first,' ' as affiliation,publisher,price
FROM book,author
WHERE publisher='Publisher1' and bookid=parentid
UNION
SELECT year,title,last,first,affiliation,publisher,price
FROM book,editor
WHERE publisher='Publisher1' and bookid=parentid)
</xsql:query>
This is the error message generated after running:
<ERROR>java.sql.SQLException: ORA-01009: missing mandatory parameter</ERROR>
When I remove the parentheses it works but this results in a different result set.
Can anybody tell me the reason?
Thanks,
Mustafa
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