I'm building a quick csv from a mysql table with a query like:

```
select DATE(date),count(date) from table group by DATE(date) order by date asc;

```

and just dumping them to a file in perl over a:

```
while(my($date,$sum) = $sth->fetchrow) {
    print CSV "$date,$sum\n"
}

```

There are date gaps in the data, though:

```
| 2008-08-05 |           4 | 
| 2008-08-07 |          23 | 

```

I would like to pad the data to fill in the missing days with zero-count entries to end up with:

```
| 2008-08-05 |           4 | 
| 2008-08-06 |           0 | 
| 2008-08-07 |          23 | 

```

I slapped together a really awkward (and almost certainly buggy) workaround with an array of days-per-month and some math, but there has to be something more straightforward either on the mysql or perl side. 

Any genius ideas/slaps in the face for why me am being so dumb?

---

I ended up going with a stored procedure which generated a temp table for the date range in question for a couple of reasons:

* I know the date range I'll be looking for every time
* The server in question unfortunately was not one that I can install perl modules on atm, and the state of it was decrepit enough that it didn't have anything remotely Date::-y installed

The perl Date/DateTime-iterating answers were also very good, I wish I could select multiple answers!