Create a sequence AAAAA - ZZZZZ

Create a sequence AAAAA - ZZZZZ

--sequence AAAAA to ZZZZZ....... wow.

 select   CHR(65+MOD((rownum-1)/(26*26*26*26), 26))
        ||CHR(65+MOD((rownum-1)/(26*26*26), 26))
        ||CHR(65+MOD((rownum-1)/(26*26), 26))
        ||CHR(65+MOD((rownum-1)/26, 26))
        ||CHR(65+MOD((rownum-1), 26)) as AA_ZZ_sequence
   from dual 
connect by level <= 26*26*26*26*26;

This is along the lines of a trick sql statement and demonstrates what can be achieved when you use the connect by terminology.