SQL How do I select plans not associated with any country - sql-server

Question

Please check http://sqlfiddle.com/#!18/1acd1/2
I'm passing UserId to get User's countryid so I can fetch plans according to user's country.
I have plans specific to countries but I don't have plans for all countries so when I pass userid where I don't have any plan for that user/country at the moment no rows returns but in that case I need to show default plans (plans with country id = '1') to that user.
Please see fiddle, In case of userid='4' no rows returns so in that case I need to show default plans to that user. all default plans have countryid=1
I hope you understand my question :) thanks

Answer 1

Here is my take on it.
I took a different approach and started from the tblProfile because your input for this query is actually a UserId so I found it more logical to follow this process:
For the UserId, fetch PlanId of his CountryId
If User's CountryId does not exist in lstCountry or has no PlanId replace User's CountryId by the default CountryId=1 (as mentioned in the comments below)
Finally, fetch Plan details and Currency for the final CountryId
Tables definitions
CREATE TABLE lstCountry(
CountryID int,
CountryTitle varchar(100),
CurrencyCode varchar(3))
INSERT INTO lstCountry (CountryId, CountryTitle, CurrencyCode) VALUES
(1, 'USA', 'USD'),
(2, 'GB', 'GBP'),
(3, 'France', 'EUR')
CREATE TABLE tblProfile(
UserId int,
CountryId int)
INSERT INTO tblProfile (UserId, CountryId) VALUES
(1, 1),
(2, 2),
(3, 3),
(4, 4)
CREATE TABLE tblPlan (
PlanId int,
PlanTitle nvarchar(50),
PlanPrice money,
CountryId int)
INSERT INTO tblPlan (PlanId, PlanTitle, PlanPrice, CountryId) VALUES
(1, 'PlanDefault', 10, 1),
(2, 'Plan2', 20, 2),
(3, 'Plan3', 30, 3),
(4, 'PlanDefault', 40, 1),
(5, 'Plan5', 50, 2)
Query
select distinct f.PlanId,
f.PlanTitle,
f.PlanPrice,
e.CurrencyCode
from (
select case when c.PlanId is null then '1' else a.CountryId end as CountryId
from tblProfile a
left join lstCountry b on a.CountryId=b.CountryId
left join tblPlan c on b.CountryId=c.CountryId
where UserId=4
) d
inner join lstCountry e on d.CountryId=e.CountryId
inner join tblPlan f on d.CountryId=f.CountryId
Result for UserId=1:
| PlanId | PlanTitle | PlanPrice | CurrencyCode |
|--------|-------------|-----------|--------------|
| 1 | PlanDefault | 10 | USD |
| 4 | PlanDefault | 40 | USD |
Result for UserId=2
| PlanId | PlanTitle | PlanPrice | CurrencyCode |
|--------|-----------|-----------|--------------|
| 2 | Plan2 | 20 | GBP |
| 5 | Plan5 | 50 | GBP |
Result for UserId=3
| PlanId | PlanTitle | PlanPrice | CurrencyCode |
|--------|-----------|-----------|--------------|
| 3 | Plan3 | 30 | EUR |
Result for UserId=4
| PlanId | PlanTitle | PlanPrice | CurrencyCode |
|--------|-------------|-----------|--------------|
| 1 | PlanDefault | 10 | USD |
| 4 | PlanDefault | 40 | USD |
Here is the SQL Fiddle
http://sqlfiddle.com/#!18/7068c/8/0

Answer 2

I think a LEFT JOIN and second parse of the table might achieve this. If not, then please look at #JuanCarlosOropeza comments and update your post with Sample and expected data.
SELECT p.PlanId,
p.PlanTitle,
p.PlanPrice,
ISNULL(c.CurrencyCode, d.CurrencyCode) AS CurrencyCode
FROM tblPlan p
LEFT JOIN lstCountry c ON c.CountryId = p.CountryId
LEFT JOIN lstCountry d ON c.CountryId IS NULL
AND d.CountryId = 226
WHERE P.CountryId = (SELECT sq.CountryId
FROM tblProfile sq --Not sure if this requires a Default Country
WHERE UserId = #UserId)
AND p.IsVisible = '1';