question: static String buildKeySelection ( int selectionCount ) { String [ ] list = new String [ selectionCount ] ; Arrays . fill ( list , "?" ) ; return KEY_COLUMN + " IN (" + TextUtils . join ( ", " , list ) + ")" ; }
target:  Build the String required for an SQL select statement: WHERE key IN (?, ?, ..., ?) without 'WHERE' and with selectionCount '?'