RE: Quick SQL assistance

    You'll need to use the mighty DECODE and MAX to help you out. Something like the following:  

select tablespace_name,

       round(max(decode(trunc(date_of_posting), trunc(sysdate),bytes_allocated))/1048576)as allocated_space,

       round(max(decode(trunc(date_of_posting), trunc(sysdate-6),bytes_allocated-bytes_used))/1048576,1)S0,

    round(max(decode(trunc(date_of_posting), trunc(sysdate-5),bytes_allocated-bytes_used))/1048576,1)S1,

    round(max(decode(trunc(date_of_posting), trunc(sysdate-4),bytes_allocated-bytes_used))/1048576,1)S2,

    round(max(decode(trunc(date_of_posting), trunc(sysdate-3),bytes_allocated-bytes_used))/1048576,1)S3,

       round(max(decode(trunc(date_of_posting), trunc(sysdate-2),bytes_allocated-bytes_used))/1048576,1)S4,

       round(max(decode(trunc(date_of_posting), trunc(sysdate-1),bytes_allocated-bytes_used))/1048576,1)S5,

       round(max(nvl(decode(trunc(date_of_posting), trunc(sysdate),bytes_allocated-bytes_used),0))/1048576,1)S6,

       round((max(decode(trunc(date_of_posting), trunc(sysdate-1),nvl(bytes_allocated-bytes_used,0),0))-

          max(decode(trunc(date_of_posting), trunc(sysdate),nvl(bytes_allocated-bytes_used,0),0)))*100/

          max(decode(trunc(date_of_posting), trunc(sysdate-1),nvl(bytes_allocated-bytes_used,bytes_allocated))),2)*-1 pct_change  

OH, don't forget the group by at the end.  

Dick Goulet
Senior Oracle DBA/NA Team Lead
PAREXEL International  

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Taylor, Chris David Sent: Monday, September 14, 2009 4:09 PM To: 'Oracle L'
Subject: Quick SQL assistance

Ok, I'm drawing a blank here as my brain seems to hvae taken the afternoon off.  

I have a dataset:  

HOST_NAME TARGET_NAME SNAP_DATE TABLESPACE_SIZE

-------------------  ------------------------  -------------------
-----------------------------
HostA            Dev1                   9/1/2009         99,999
HostA            Dev1                   9/2/2009         99,999
HostA            Dev1                   9/3/2009         99,999

HostA            Dev2                   9/1/2009         89,999
HostA            Dev2                   9/2/2009         89,999
HostA            Dev2                   9/3/2009         89,999
 

What I need to do is come up with a query that takes the above data and ONLY shows dates of weekly intervals. I need to get the following dataset:  

(Weekly Snapshot)

HostA        Dev1        9/1/2009                 99,999
HostA        Dev1        9/8/2009                 101,999
HostA        Dev2        9/1/2009                 89,999
HostA        Dev2        9/8/2009                 91,999
 

I think I need to use an analytic function of some sort, but I cannot seem to come up with the syntax.  

Anyone have any suggestions/thoughts? (Obviously I could create another date table as a driver table and join the dates to it, but I know there's a simpler way)      

Chris Taylor
Sr. Oracle DBA
Ingram Barge Company
Nashville, TN 37205
Office: 615-517-3355
Cell: 615-354-4799
Email: chris.taylor_at_ingrambarge.com  

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