Help with minimum/group by

[Brendan Moran]

Suppose I have a simple table:

closest:
+---+-------+
| a | b |
+---+-------+
| 1 | 1 |
| 2 | 5.7 |
| 3 | 15.9 |
| 4 | 6.8 |
| 5 | 17 |
| 6 | -12.7 |
+---+-------+

And I want to find the closest match to b=14.3. My query would be:
SELECT MIN(ABS(14.3-b)),a,b FROM closest;
However, this is a syntax error, as I'm mixing group and non-group columns with no group-by statement. How do I return not only the minimum, but also the row that it matched on?

Thanks,
Annirak