GENERATE ALPHABETS IN SEQUENCE WITH ORACLE SQL

SQL> -- HOW TO GENERATE ALPHABETS WITH ORACLE SQL QUERIES
SQL>
SQL>
SQL> SELECT CHR(X.RNO +64) "ALPHA" FROM (
  2                select level rno
  3                from dual
  4                connect by level <= 26 ) X ;

ALPHA

-----

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

26 rows selected

SQL>