How to use PHP batch processing MySQL data? I hope the master can give the code directly, thank you

How do I bulk process mysql data using PHP? Hope that the master can directly give the code, thank you!
For example, there are several data in the database that want to add and insert two fields from each piece of data into another field:

CCA CCB CCD ID
45 66 0 1
67 36 0 2
86 24 0 5
76 84 0 8
6 55 0 12
......

The single calculation is as follows:

 
 Require_once ("header.php");

$q = "SELECT * from member where id= ' 5";
$r = $obj _db->simplequery ($q);
$a = $obj _db->fetchrow ($r, DB_FETCHMODE_ASSOC);

$CCD = $a [cca]+ $a [CCB];

$obj _db->simplequery ("Update member set ccd= ' $CCD ' where id= ' 5 '");
?>

Is there any way to calculate each piece of data in batches at once? Please give the detailed code, thank you!
------Solution--------------------
$obj _db->simplequery ("Update member set CCD=CCA+CCB");

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