I have a table like the following : 

```
ID  |INFO     | DATE_DT
-------------------------
1091|info5    |10/10/2010
1239|old.info |14/09/2010
1340|old.info |07/10/2010
3481|info     |16/10/2010
4134|info3    |21/01/2011

```

i would like to display just one row with the following conditions :  

- if i have in my table one row with `INFO = 'info'` --> display just this row  

- if i dont have one row with `INFO = 'info'` so i --> display the row with `INFO = 'old.info'` and `DATE_DT = MAX(DATE_DT)` 

so, in my example if my table is :

```
ID  |INFO     | DATE_DT
-------------------------
1091|info5    |10/10/2010
1239|old.info |14/09/2010
1340|old.info |07/10/2010
3481|info     |16/10/2010 ===> display this row
4134|info3    |21/01/2011

```

or if my table doesnt containt INFO = 'info'

```
ID  |INFO     | DATE_DT
-------------------------
1091|info5    |10/10/2010
1239|old.info |14/09/2010
1340|old.info |07/10/2010 ===> display this row
4134|info3    |21/01/2011

```

any suggestions?

Thanks.