[Zope] SQL returns as <dtml-sqlvar foobar> ?

[Richard Smith]

Say I have a query like......
 
SELECT * FROM foo; 

Can I, in Zope have the results come back so I can use then as
<dtml-sqlvars> in other statements.  Like have a link to update 
a row at the end of a table ? If so can someone give me an example ?

Thanks
Richard