Mysql join with one to many relations - mysql

Question

claims
c_id claim id
1 201
2 202
3 203
4 204
claim_status
cs_id claim_id status
1 201 created
2 202 created
3 202 submitted
4 203 submitted
5 204 created
If the claim is created and submitted(like claim_id 202) it would not show up if i search with 'created' condition. this is my main requirement. i need result like below
If i search with status='created' i need to get records as below
c_id claim_id cs_id claim_id status
1 201 1 201 created
4 204 5 204 created
If i search with status='submitted' i need to get records as below
c_id claim_id cs_id claim_id status
2 202 3 202 submitted
3 203 4 203 submitted
But i'm unable to achive my result with below query. I'm new to stackoverflow. so please forgive me if i'm wrong in clear posting.
SQL:
SELECT * from claims c
INNER JOIN claim_status cs
ON c.claim_id = cs.claim_id
WHERE cs.status='created'
GROUP BY cs.claim_id

Answer 1

for 'created':
SELECT * from claims c
INNER JOIN claim_status cs
ON c.claim_id = cs.claim_id
WHERE cs.status='created'
for 'submitted':
SELECT * from claims c
INNER JOIN claim_status cs
ON c.claim_id = cs.claim_id
WHERE cs.status='submitted'

Answer 2

To get claims that are created but not submitted try this:
SELECT * from claims c
INNER JOIN claim_status cs
ON c.claim_id = cs.claim_id
WHERE cs.status='created'
AND NOT EXISTS (
SELECT 1
FROM claim_status cs2
WHERE cs2.claim_id = cs.claim_id
AND cs2.status='submitted'
)

Answer 3

Are those your actual tables? why are you handling claim statuses on another table than claims? You should have a "status" column on "claims" and you are done. You could have another table for versioning (if you want to get older states of the claim) and save changes, timestamps, etc, but for the current status is much better to have that on the same table
I know it's not the answer you are asking, but I think it's better to have something like:
SELECT * FROM claims WHERE status = 'created'
or
SELECT * FROM claims WHERE status = 'submitted'
It's faster, cleaner, better, everything (?)
Also, to make them even faster, status should be an integer column and "created" should have an associated number so you can do
SELECT * FROM claims WHERE status = <value that means created>
the same for submitted or any extra status