When it holds an infinite number, since “infinity” is not a number. Oracle Database OCM Franck Pachot reminded me recently about the floating point literals available in Oracle Database, such as **binary_float_infinity** and **binary_double_infinity**. Not only can you use them to compare to numbers that can’t be represented as numeric literals, but you can also populate table columns with them:

```
SQL> create table double_demo as
2 select binary_double_infinity dinf from dual;
Table DOUBLE_DEMO created.
SQL> select dinf+1 from double_demo;
DINF+1
----------
Inf
SQL>
```

Apparently, Infinity+1 is still Infinity! Comparison operators don’t seem to work as expected, but not surprisingly given that infinity is not really a number:

```
SQL> select
2 case
3 when dinf+1 > dinf then 'Double is better!'
4 when dinf-1 < dinf then 'Less than nothing?'
5 when dinf+1 = dinf then 'They are all the same.'
6 else 'I have NO idea.'
7 end inception_time
8 from double_demo;
INCEPTION_TIME
----------------------
They are all the same.
SQL>
```

As I am always curious about what goes on behind the scenes, I used the DUMP function to see what is actually stored in that column:

```
SQL> select dump(dinf) from double_demo;
DUMP(DINF)
------------------------------------
Typ=101 Len=8: 255,240,0,0,0,0,0,0
SQL>
```

So the next time someone asks you what infinity actually means, you can say that in Oracle Database, a double precision infinity = 0xFFF0000000000000.

How could one possibly forget the amazing capacity of Hilbert’s Hotel: https://en.wikipedia.org/wiki/Hilbert%27s_paradox_of_the_Grand_Hotel

I’ll never forget the first week that the McDonald’s smartphone app was available: https://www.dropbox.com/s/c73n9vit4rmfsuk/nan.png?dl=0

Why I was ordering so-called food from that so-called restaurant is beyond me.