Mixed case (alternate upper & lower)...

Question

Hello Friends,
1) always 1st character is lowercase,2nd character is uppercase and so on.
2) ignore the spaces/numbers while converting i.e. alternate lower and upper case character
input:
hello world
Good Morning
All Are Fine Here
output:
hElLo WoRlD
gOoD mOrNiNg
aLl ArE fInE hErE
Any help will be appreciated.

Answer 1

SQL> with greetings as
  2    (select 'hello world'       greet from dual union all
  3     select 'Good Morning'      greet from dual union all
  4     select 'All Are Fine Here' greet from dual)
  5    --
  6    select greet,
  7           max(replace(sys_connect_by_path(decode(mod(rn, 2),1,lower(lett),upper(lett)),'/'),'/')) new_greet
  8      from (select t.*,
  9                   lev - sum(decode(lett, ' ', 1, 0)) over(partition by greet order by lev) rn
10              from (select greet, substr(greet, level, 1) lett, level lev
11                      from greetings
12                    connect by level <= length(greet)
13                           and prior greet = greet
14                           and prior dbms_random.value is not null) t) tt
15    connect by prior greet = greet
16           and prior lev + 1 = lev
17     start with lev = 1
18     group by greet
19  /
GREET             NEW_GREET
All Are Fine Here aLl ArE fInE hErE
Good Morning      gOoD mOrNiNg
hello world       hElLo WoRlD
SQL