Is there a postgres CLOSEST operator?

Question

I\'m looking for something that, given a table like:

| id | number |
|  1 |     .7 |
|  2 |   1.25 |
|  3 |   1.01 |
|  4 |    3.0 |

the qu

Answer 1

The 2nd answer is correct, but I encountered error on "UNION ALL":

DBD::Pg::st execute failed: ERROR: syntax error at or near "UNION"

I fixed it with this code:

SELECT * FROM
  (
    (SELECT * FROM table WHERE num >= ? ORDER BY num LIMIT 1)
        UNION ALL
    (SELECT * FROM table WHERE num < ?  ORDER BY num DESC LIMIT 1)
  ) as foo
ORDER BY abs(?-num) LIMIT 1;

the trick is to remove the AS from the inner tables and use it only on the UNION.