OK I eventually had a go.
I tried the underneath code snippet.
It first of all told me that there was an error in the SQL syntax, so I recreated everything.
And once I had done that, there was no effect at all; I was just left with the initial value showing in the input box.
URLs you need are in private area..
$CKEditor_initialValue = $rsAllPresenterData->getColumnVal("Biography");
$CKEditor_initialValue = "Please place your Biography here.";