SQL Organise via dates and match via logic

Question

<p>
Dear All,
<strong>
My apologies I missed out what makes it a little hard. Please read below:</strong>
I have a a table like these:
custDetails
custID custName
11112 John Smith
11113 Jane Smyth
11114 Barry Bell
11115 Jonny Ball
faultDetail
custID Time&Date Description
11112 28/10/08 08:00:00 Started Work
11112 28/10/08 08:10:00 Did report
11112 28/10/08 09:00:00 Fixed Car
11112 28/10/08 09:10:00 Drove Car to cust house
11112 28/10/08 09:10:12 Cust got car
11113 29/10/08 08:00:00 Started Work
11113 29/10/08 08:20:00 Did report
11113 29/10/08 08:30:00 Fixed Carr
11113 29/10/08 08:40:00 Drove Car to cust house
11113 29/10/08 08:40:00 Cust not in
11113 29/10/08 08:40:00 Drove Car to cust house
11113 29/10/08 08:43:00 Cust got car
11114 29/10/08 08:00:00 Started Work
11114 29/10/08 08:20:00 Did report
11114 29/10/08 08:30:00 Fixed Carr
11114 29/10/08 08:40:00 Drove Car to cust house
11114 29/10/08 08:40:00 Cust not in
11114 29/10/08 08:40:00 Drove Car to cust house
11114 29/10/08 08:43:00 Cust not in left car at garrage
<strong>11114 29/10/08 08:45:00 Cust got car</strong>
11115 29/10/08 08:00:00 Started Work
11115 29/10/08 08:20:00 Did report
11115 29/10/08 08:30:00 Fixed Carr
11115 29/10/08 08:40:00 Drove Car to cust house
11115 29/10/08 08:40:00 Cust not in left car at garrage
11115 29/10/08 08:40:00 Drove Car to cust house
<strong>11115 29/10/08 08:41:01 Got a burger and chips</strong>
11115 29/10/08 08:43:00 Cust got car
All I want to know is whether the customer got their car back by us or they got it from the garage. I have outlined 4 scenarios
11112 customer gets there car back no issues..
11113 customer gets there car back on the second attempt.
11114 customer keeps not being in so we ask them to pick it up from the <strong>garage cust picks it up from garage</strong>.
11115 customer keeps not being in so we ask them to pick it up from the garage, but for what ever reason we end up dropping it off anyway.
The desired output to did the customer get there car back by us.
1112 Yes
1113 Yes
1114 No
1115 Yes
I was hoping someone could help me with this, what is more annoying is that the dates are all jumbled up. How would I go about writing the SQL to create my desired out puts?
<strong>Sorry!</strong>
</p>
Edited by: DaveyB on Oct 28, 2008 3:23 PM
Edited by: DaveyB on Oct 29, 2008 2:18 AM
Edited by: DaveyB on Oct 29, 2008 2:23 AM

Answer 1

Nopparat V. wrote:
I assume that you want the rows with description 'Cust got car' which come after 'Drove Car to cust house' immediately
the follow query may help you. One restriction is that act_date column must be unique for each custid
select custid, max(got_car_by_us) got_car_by_us
from (
select custid,
case when description = 'Cust got car'
and lag(description) over (partition by custid order by act_date) = 'Drove Car to cust house'
then 'Yes'
else 'No'
end got_car_by_us
from faultdetail
group by custid
The rule is
IF we drive the car to the customers house and the customer gets the car then everything is great we get a Yes.
IF we drive the car to the customers house and the customer isn't in and they have to pick it up from the garage then we get a No.
IF we drive the car to the customers house and the customer isn't in and we take it back to the garrage and then they call us up and say can we drop it off again later. WE will then drive the car to the customers house and the customer gets the car then everything is great we get a Yes.
Also they don't always follow in a pattern, as you can see the driver may notes the driver is getting food etc during his journey.
Edited by: DaveyB on Oct 29, 2008 2:13 AM