The question
Display, by company, the company name, contact name and phone number for any payer who has no insureds.
(now, I believe a company is the payer, yet can still have no insureds, if that makes sense.)
The ERD
http://s23.postimg.org/5zo1dajw7/image.jpg
What I've tried
Yea, don't ask where i was going with this..........it isn't good
Thats the closest I could get,
INSURED TABLE
The thing is, Im trying to get a list of entites where there is no insurance likely a company from payer, then a mortal?
Display, by company, the company name, contact name and phone number for any payer who has no insureds.
(now, I believe a company is the payer, yet can still have no insureds, if that makes sense.)
The ERD
http://s23.postimg.org/5zo1dajw7/image.jpg
What I've tried
Code:
SELECT PAYER.COMPANY_NAME, CONTACT_NAME, PHONE_NUM
FROM PAYER
JOIN PLAN ON PAYER.PAYER_ID = PLAN.PAYER_ID
JOIN POLICY ON PLAN.POLICY_ID =POLICY.POLICY_ID
JOIN INSURED ON POLICY.POLICY_ID = INSURED.POLICY_ID
JOIN MORTAL ON INSURED.MORTAL_ID = MORTAL.MORTAL_IDCode:
SQL> SELECT PAYER.COMPANY_NAME, PAYER.CONTACT_NAME, PAYER.PHONE_NUM
2 FROM PAYER
3 JOIN PLAN ON PLAN.PAYER_ID = PAYER.PAYER_ID
4 JOIN POLICY ON POLICY.PLAN_ID = PLAN.PLAN_ID
5 LEFT OUTER JOIN INSURED ON INSURED.POLICY_ID = POLICY.POLICY_ID
6 WHERE
7 INSURED.POLICY_ID IS NULL;
no rows selectedINSURED TABLE
Code:
SQL> select * from insured;
INSURED_ID I POLICY_ID MORTAL_ID
---------- - ---------- ----------
602 P 501 102
603 s 501 103
604 c 501 104
605 p 502 105
606 S 502 106
607 C 502 107
608 P 503 108
609 c 503 109
610 p 504 110
611 C 504 111
612 P 505 112
613 s 505 113
614 c 506 114
615 C 506 115
616 P 507 116
617 S 507 117
618 c 507 118
619 p 508 119
620 C 508 120