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Sql query help

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nitagar3107
Starting Member

1 Post

Posted - 2012-11-19 : 04:13:59

Hi,I am trying to execute a sql query which says to count the number of customer who live in same city of employees and also find their average checking balance. I have four tables customer(cid,city ,cname)..employees(eid,city,ename)....transactions(tid,aid,cid,eid,trans_date,amount,trans_type)... and accounts(aid,balance,account_type,date_opened).. Please anyone can help me out it will be great... Thanks..

sodeep
Master Smack Fu Yak Hacker

7174 Posts

Posted - 2012-11-19 : 13:11:54

Though your question is not clear:

Here is my shot:

Select e.city,Count(Cid),AVG(balance) as CheckingBalance
from customer c
inner join transactions t on t.cid = c.cid
inner join employees e on e.eid = t.eid
inner join accounts a on a.tid = t.tid
Where account_type = 'Checking'
Group by e.city

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-11-20 : 02:11:34

[code]
SELECT e.*,t.CustCnt,t.AvgBal
FROM employees e
INNER JOIN (SELECT c.city,COUNT(DISTINCT c.cid) AS CustCnt, AVG(a.balance*1.0) AS AvgBal
FROM customer c
INNER JOIN transactions t
ON t.cid = c.cid
INNER JOIN accounts a
ON a.aid = t.aid
WHERE a.account_type='Checking'
GROUP BY c.city
)t
On t.city = e.city
[/code]

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SQL Server MVP
http://visakhm.blogspot.com/

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