For the last option (hide an answer option) you don't have to manage tables* only use javascript with a code similar than:
<script type="text/javascript" charset="utf-8">
$(document).ready(function() {
$('#javatbd14254X295X2205nc').hide();
});
</script>You have to look to the source code of your survey and adapt this snippet, with correct question type (radio, dropdown etc...) and IDs (search at the doc for SGQA code)
*Answer tables present in the database:
For current answers (active survey):
"lime_survey_10000"
For old answers (includes date of desactivation):
"lime_old_survey_10000_20121217110331" 
