Advance aggreate function: help required

Question

Hi All, Pls help me in solving the below requirement
Sample Data:
F1 F2 F3
[email protected] A 1
[email protected] B 1
[email protected] A 2
[email protected] A 1
Unique combination of F2 & F3 to be treated as a account.
Need to find the total accounts related to the domain along
with Unique emailID's and the accounts related to each email.
Required Output:
o1 o2 o3 o4
d1.com [email protected] 3 2
d1.com [email protected] 3 1
d1.com [email protected] 3 1
o1: Domain
o2: Unique email ID's in the Domain
o3: Unique accounts accessible by Domain
o4: Unique accounts accessible by Email
I'm able to get o1, o2 & o4 with the following sql
SELECT a.domain, a.F1, COUNT (a.rnum)
FROM (SELECT UNIQUE ROWNUM rnum,
SUBSTR (TRIM (F1),
INSTR (TRIM (F1), '@') + 1
) AS domain,
F1, F2, F3
FROM tab1
WHERE F1 LIKE '%d1.com%') a
GROUP BY a.domain, a.F1
Pls help me in completing this sql for the required output.
Thanks :-)

Answer 1

What version/edition of Oracle are you using? Can you use analytics?
SELECT a.domain, a.F1, COUNT (a.rnum),
count(a.domain) over (partition by a.domain) domain_count
FROM (SELECT UNIQUE ROWNUM rnum,
SUBSTR (TRIM (F1),
INSTR (TRIM (F1), '@') + 1
) AS domain,
F1, F2, F3
FROM tab1
WHERE F1 LIKE '%d1.com%') a
GROUP BY a.domain, a.F1;
DOMAIN               F1                   COUNT(A.RNUM) DOMAIN_COUNT
d1.com               [email protected]                    2            3
d1.com               [email protected]                    1            3
d1.com               [email protected]                    1            3