Update Multiple Rows in one PHP

Question

I have three rows with three columns in one table

id    type       value
1     gold       1000.00
2     silver     32.21
3     platinum   1500.00


        

Answer 1

You could use a CASE clause like this:

$query = "UPDATE metals SET value = CASE id WHEN 1 THEN $gold  WHEN 2 THEN $silver WHEN 3 THEN $plat END";

This seems a bit of overkill for just three rows, though.

Answer 2

Why not use the metal name as your key?

$update="UPDATE metals SET value = '".$gold."' WHERE type = 'gold'";

And you really need to switch to prepared statements. You're wide open to SQL injection