Consolidate data from three rows (with nulls) into one - sql

Question

I have three tables:
Profile
-ProfileID
-FirstName
-LastName
ProfilePhoneNumber
-ProfileID
-PhoneNumberID
PhoneNumber
-PhoneNumberID
-PhoneNumberTypeID
-Number
ProfilePhoneNumber is a simple bridge table between Profile and PhoneNumber.
I want to query for specific phone number types and return a single row. I want to be able to accept null values because not all people will have all types of phone numbers.
Here is my current query:
SELECT
p.FirstName
, p.LastName
, bpn.Number as BusinessPhoneNumber
, mpn.Number as MobilePhoneNumber
FROM Profile p
LEFT JOIN ProfilePhoneNumber ppn ON p.ProfileID = ppn.ProfileID
LEFT JOIN PhoneNumber bpn ON ppn.PhoneNumberID = bpn.PhoneNumberID AND bpn.PhoneNumberTypeID = '1'
LEFT JOIN PhoneNumber mpn ON ppn.PhoneNumberID = mpn.PhoneNumberID AND mpn.PhoneNumberTypeID = '2'
WHERE p.ProfileID = '123'
This always works, but returns three rows because Profile 123 has three phone numbers, and so the query returns a row for each phone number.
If I change it to an INNER JOIN on PhoneNumber, I can get only one row back, but only in circumstances where the Profile being queried has all of the PhoneNumberTypeID types that I am querying for.
How do I return one row that is null tolerant?

Answer 1

I will update the query later, if you provide some data sample and expected output.
So far, will this help?
SELECT
p.FirstName
, p.LastName
, Max(bpn.Number) as BusinessPhoneNumber
, Max(mpn.Number) as MobilePhoneNumber
FROM Profile p
LEFT JOIN ProfilePhoneNumber ppn on p.ProfileID = ppn.ProfileID
LEFT JOIN PhoneNumber bpn on ppn.PhoneNumberID
= bpn.PhoneNumberID AND bpn.PhoneNumberTypeID = '1'
LEFT JOIN PhoneNumber mpn on ppn.PhoneNumberID
= mpn.PhoneNumberID AND mpn.PhoneNumberTypeID = '2'
WHERE p.ProfileID = '123'
group by p.FirstName, p.LastName;

Answer 2

If each profile has one phone per type then you can:
Use INNER JOIN queries to match profile with each phone type
Use LEFT JOIN query to match the profiles with the above
DDL:
CREATE TABLE profile (ProfileID INT NOT NULL, FirstName VARCHAR(100), LastName VARCHAR(100), PRIMARY KEY (ProfileID));
INSERT INTO profile (ProfileID, FirstName, LastName) VALUES (1, 'User', '#1'), (2, 'User', '#2'), (3, 'User', '#3');
CREATE TABLE phonenumber (PhoneNumberID INT NOT NULL, PhoneNumberTypeID INT, Number VARCHAR(100), PRIMARY KEY (PhoneNumberID));
INSERT INTO phonenumber (PhoneNumberID, PhoneNumberTypeID, Number) VALUES (1, 1, '0800-U1BUS'), (2, 1, '0800-U2BUS'), (3, 2, '0800-U2MOB'), (4, 1, '0800-U3BUS'), (5, 2, '0800-U3MOB'), (6, 3, '0800-U3ETC');
CREATE TABLE profilephonenumber (ProfileID INT NOT NULL, PhoneNumberID INT NOT NULL, PRIMARY KEY (ProfileID,PhoneNumberID));
INSERT INTO profilephonenumber (ProfileID, PhoneNumberID) VALUES (1, 1), (2, 2), (2, 3), (3, 4), (3, 5), (3, 6);
Query:
SELECT Profile.FirstName, Profile.LastName, BusPhone.Number AS BusPhoneNumber, MobPhone.Number AS MobPhoneNumber
FROM profile
LEFT JOIN (
SELECT ProfileID, Number
FROM profilephonenumber
INNER JOIN phonenumber ON profilephonenumber.PhoneNumberID = phonenumber.PhoneNumberID
WHERE PhoneNumberTypeID = 1
) AS BusPhone ON Profile.ProfileID = BusPhone.ProfileID
LEFT JOIN (
SELECT ProfileID, Number
FROM profilephonenumber
INNER JOIN phonenumber ON profilephonenumber.PhoneNumberID = phonenumber.PhoneNumberID
WHERE PhoneNumberTypeID = 2
) AS MobPhone ON Profile.ProfileID = MobPhone.ProfileID
Output:
+-----------+----------+----------------+----------------+
| FirstName | LastName | BusPhoneNumber | MobPhoneNumber |
+-----------+----------+----------------+----------------+
| User | #1 | 0800-U1BUS | NULL |
| User | #2 | 0800-U2BUS | 0800-U2MOB |
| User | #3 | 0800-U3BUS | 0800-U3MOB |
+-----------+----------+----------------+----------------+
SQL Fiddle

Answer 3

-- Sample data.
declare #Profile as Table ( ProfileId Int Identity, FirstName VarChar(10), LastName VarChar(10) );
insert into #Profile ( FirstName, LastName ) values
( 'Alice', 'Aardvark' ), ( 'Bob', 'Bear' ), ( 'Cindy', 'Cat' );
declare #PhoneNumber as Table ( PhoneNumberId Int Identity, PhoneNumberTypeId Int, Number VarChar(10) );
insert into #PhoneNumber ( PhoneNumberTypeId, Number ) values
( 1, '1111111111' ), ( 2, '1112221111' ), ( 1, '1113331111' ), ( 2, '2222222222' );
declare #ProfilePhoneNumber as Table ( ProfileId Int, PhoneNumberId Int );
insert into #ProfilePhoneNumber ( ProfileId, PhoneNumberId ) values
( 1, 1 ), ( 1, 2 ),
( 2, 3 ),
( 3, 4 );
-- Dump the sample data.
select *
from #Profile as P left outer join
#ProfilePhoneNumber as PPN on PPN.ProfileId = P.ProfileId left outer join
#PhoneNumber as PN on PN.PhoneNumberId = PPN.PhoneNumberId;
-- Do the deed.
with ExtendedPhoneNumbers as (
select ProfileId, PhoneNumberTypeId, Number
from #ProfilePhoneNumber as PPN inner join
#PhoneNumber as PN on PN.PhoneNumberId = PPN.PhoneNumberId )
select P.FirstName, P.LastName,
EPNB.Number as BusinessPhoneNumber,
EPNM.Number as MobilePhoneNumber
from #Profile as P left outer join
ExtendedPhoneNumbers as EPNB on P.ProfileID = EPNB.ProfileID and EPNB.PhoneNumberTypeId = 1 left outer join
ExtendedPhoneNumbers as EPNM on P.ProfileID = EPNM.ProfileID and EPNM.PhoneNumberTypeId = 2
where P.ProfileId = 2; -- Comment out the WHERE clause to see all profiles.