show location and total staff cost for each event

Question

1.00/5 (2 votes)

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EVENT TABLE
EVENT_ID, LACATION,DURATION

STAFF TABLE
SSN,HOURLY_RATE

EVENT_STAFF TABLE
EVENT_ID,SSN

I TO MANY RELATIONSHIP IN EVENT_STAFF TABLE.

Posted 8-Dec-15 22:14pm

Member 12195543

Updated 8-Dec-15 22:34pm

v2

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Suvendu Shekhar Giri 9-Dec-15 5:08am

What have u tried so far?
Can u share sample of desired result?

_Asif_ 9-Dec-15 5:12am

What have you tried?

2 solutions

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John C Rayan · Answer 1 · 2015-12-08T23:18:00

Solution 1

SQL

select ev.EVENT_ID, ev.LOCATION, SUM(s.HOURLY_RATE) cost 
from EVENT_STAFF es
left join event ev on ev.EVENT_ID = es.EVENT_ID
left join staff s on s.ssn = es.SSN
group by ev.EVENT_ID , ev.location
order by ev.EVENT_ID

Posted 8-Dec-15 23:18pm

John C Rayan

_Asif_ · Answer 2 · 2015-12-08T23:17:00

Solution 2

I hope this should work!

SQL

SELECT LOCATION, TOTAL_COST
FROM
(
SELECT ES.EVENT_ID, SUM(HOURLY_RATE) TOTAL_COST
FROM   EVENT_STAFF ES
       INNER JOIN STAFF S ON ES.SSN = S.SSN
GROUP BY ES.EVENT_ID
) T INNER JOIN EVENT E ON T.EVENT_ID = E.EVENT_ID

Posted 8-Dec-15 23:17pm

_Asif_