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my $confidence_query = $dbh->prepare("select confidence_str from $tabl
+e  where probeset_id = ?");

$confidence_query->execute('SNP_1');

DBD::mysql::st execute failed: You have an error in your SQL syntax; c
+heck the manual that corresponds to your MySQL server version for the
+ right syntax to use near 'where probeset_id='SNP_1')