Java check two tables within SQLite

I have a database that has two tables, being EstoqueDBQ and FilaDBQ , I need to create the following logic.

If the value exists in the FilaDBQ table and in stoqueDBQ , this value should be excluded from FilaDBQ, I thought I'd use the code below, but I'm having trouble adapting .

    String sql = "SELECT UM FROM FilaDBQ [.....]";
    Cursor data = database.rawQuery(sql, null);

    if (cursor.moveToFirst()) {
     Se é verdade, apagar o valor na tabela FilaDBQ
    } else {
   Se não, nada acontece.
    }