如何获得一个 id 结果并将其添加到 mysql 表中的另一个？

Question

How can I record all data in a table together?

i have values in individual rows that i wish to add up to one. and get the value into a variable.

what can i use instead of this code below to get all id in the table instead of one?

  if(isset($_GET['ide'])){
 $coode = $_GET['ide'];

so that once i get all id, i can do the query below...

$products = $db->query("SELECT e1,e2 FROM eyfstb WHERE specialnum='$coode'");
 while($row = $products->fetch_assoc()){
 $e1view = $row["e1"]; $e2view = $row["e2"];
}

and once the query is done, i want to be able to store them in a variable like below

$final = (e1,e2 of id1) + (e1,e2 of id2) + (e1,e2 of id3) + (e1,e2 of id4);

fine is 5 good is 4 fair is 3 my e1 is fine which is equal 5 my e2 is good which is equal 4

making 9 when i added it. but i want to get for all record rows in the table

currently i'm able to get the details for only one student from the url $coode but i want to get for all the student from a table and be able to add the resulting data.

Table Structure

id  |   e1    |   e2   |
---------------------------
1   |  fine   |  good  |
2   |  good   |  good  |
3   |  fair   |  fine  |

Answer 1

Better way is to store in database parameters like this as integer. It generates less problems with math operations or comparison.

But if you can't refactor it you should map each value to their numerical equivalent.

function mapDbValue(string $value): int {
  switch ($value) {
    case 'fine': return 5;
    case 'good': return 4;
    case 'fair': return 3;
  } 
}

And now in your while loop map values and add it.

$final = 0;
while (...) {
  $final += mapDbValue($row['e1']) + mapDbValue($row['e2']);
}