Got things down to the query

my $batchnumber = $CGI ->param('batchnumber')||"20170903nervana" ;

my $sql = "SELECT time, mastuntemp, LineTemp, spargtemp FROM brew_temp
+_tb WHERE sitename = 'Brew' AND batchnumber = '$batchnumber' ORDER BY
time";
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There is data in the database. Which I display in ttml