Reading php and associative array from multiple database records

I know there have been many questions on associative arrays, but I haven't seen one that explains what I have to do to extract the data from this way of creating one. Assume that I have selected multiple records from the same field in the database.

    while ($Row = mysql_fetch_array($mySQLData))
    {
    $assocarraydata[]= array('field1'=>$Row["field1"]);
    };

I know I can do it this way using the index:

    //Put Data into an regular array
    while ($Row = mysql_fetch_array($mySQLData))
    {
    $field1[] = $Row[field1];
    }

    echo $field1[1];

But I don't know how to do it for the associative array in the first example. Can someone help?

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Hard to figure out what you're asking, but if the question is how to produce the same result from the first example, the answer is:

// echo the value of field1 from the second (index 1) row of data
echo $assocarraydata[1]['field1'];