Question

Anyone knows how to get sum of number?

For example i have mysql column name package.

Package 3 4 1 3 4 

If package 3, the value should be usd 5, if package 4, value should be usd 10, if package 1, value should be usd 1 and so on.

So the total value above should be => 5 + 10 + 1 + 5 + 10 = 31

So how do i get sum of it in php?

i tried array_sum .. but it gives me error, im not very expert in php.. Please help me

Thanking in advance.

Answer 1

Get the database to do the work:

select sum(CASE WHEN package = 3 THEN 5 ELSE 0 END)        + sum(CASE WHEN package = 4 THEN 10 ELSE 0 END)        + sum(CASE WHEN package = 1 THEN 1 ELSE 0 END) AS total from table_name 

The right way of doing it, if you’ve got more than a few values be to modify the table to contain the amount field so you can do:

select sum(amount) from table_name 

Alternatively have another table that you contained the relationship between the values (package, amount), and then do

select sum(package_amount)  from table_name, lookup_values where table_name.package = lookup_values.package 

Or, if you really want to do it in PHP:

$amount = array(3=>5, 4=>10, 1=>1);  // define the amount of each value $result = mysql_query('SELECT id FROM table_name'); $sum = 0;  while ($row = mysql_fetch_assoc($result)) {     $sum += $amount[ $row['id'] ]; }