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table t : { A : int }
fun sortEm b =
queryX1 (SELECT * FROM t ORDER BY t.A {if b then sql_asc else sql_desc})
(fn r => <xml>{[r.A]}; </xml>)
fun main () : transaction page = return <xml><body>
<a link={sortEm True}>Ascending</a><br/>
<a link={sortEm False}>Descending</a>
</body></xml>
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