Hi,
I am trying to build a query that does a sum if a certain parameter is set.
For example:
I have a row with four fields: code1, code2, duration and bytes. My current
query looks something like this: SELECT code1 as code, sum(bytes) as bin,
max(bytes) as min, avg(bytes) as ain, count(bytes) as cin, sum(duration) as
dur from data group by code; which returns something like this:
+---------------------------+--------------+-----------+-------------+----------+-------------+
| code | bin | min | ain |
cin | dur |
+---------------------------+--------------+-----------+-------------+----------+-------------+
| NONE | 103939170759 | 485089817 | 3739.1827 |
27797297 | 11681839027 |
Now, what i need todo is exclude certain info from the above NONE entry if
code2 is equal to something. So for example (in php terminology):
if(code == 'NONE') {
if(code2 == 'DENIED') { continue; }
else {
bin += bytes;
if(bytes > min) { min = bytes; }
cin++;
dur += dur;
}
}
after that i could work out the average by dividing bin / cin for what in
the report is called ain. Is there any way of achieving this via the sql
query because the above is a hugely tedious way of doing it. I know mysql
has an if() statement, but I have no idea how to implement it using what i
want to achieve above.
Thanks in advance.
Ian
