How to set the value of a data template parameter at runtime?

I went through the document and found one line "A parameter is a variable whose value can be set at runtime.". But there is no further description or example about this feature.
Can anyone tell how to do or show me a example?
Thanks in advance

Hi,
define in the report-definition a parameter (for example p_deptno). This results in an entry in the xdo-file:
<parameter id="p_deptno"> ....
Define the same parameter in the Data Template ....
<parameters>
<parameter name="p_deptno" datatype="number"/>
</parameters>
and use this parameter in your Query:
<sqlStatement name="QueryDept">
<![CDATA[SELECT DEPTNO,DNAME,LOC FROM DEPT WHERE DEPTNO = :p_depnto]]>
</sqlStatement>
Regards
Rainer

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