Group function problem

Question

Hi, I need to list the shortest string along with the number of characters in the string, so far I've come up with:
SELECT eventtitle, MIN(LENGTH(eventtitle))
FROM event
Oracle XE is giving the error "not a single-group group function", but I can't quite see how to get "eventtitle" on it's own, the function "MIN(LENGTH(eventtitle))" does give me the desired result if run by its self. I'm grateful for any assistance!

Answer 1

  1  with t
  2  as
  3  (
  4   select 'abcd' short_string from dual
  5   union all
  6   select 'a' short_string from dual
  7   union all
  8   select 'b' from dual
  9  )
10  select short_string, rownum rn from t
11* order by length(short_string)
SQL> /
SHOR         RN
a             2
b             3
abcd          1one version using analytics
  1  with t
  2  as
  3  (
  4   select 'abcd' short_string from dual
  5   union all
  6   select 'a' short_string from dual
  7   union all
  8   select 'b' from dual
  9  )
10  select short_string, len from
11  (
12  select short_string, length(short_string) len, min(length(short_string)) over() min_length from t
13* ) where len = min_length
SQL>
SHOR        LEN
a             1
b             1Regards
Raj