Solved

SQL Query - Oracle 10g - Subract date from next data row

Posted on 2016-11-03
4
68 Views
Last Modified: 2016-11-07
Experts,
I need some help with a query I need to populate a report.
I have data that looks like this:
JOB        START TIME
TASK1   02/11/2016 09:00
TASK2   02/11/2016 09:06
TASK3   02/11/2016 09:08
END      02/11/2016 09:12

Each row has a JobID and a start time. The end time needs to be the start time of the next Job.
My goal is to add a column that contains the total task time
JOB        START TIME        TOTAL TIME
TASK1   02/11/2016 09:00   6.0
TASK2   02/11/2016 09:06   2.0
TASK3   02/11/2016 09:08   4.0
END      02/11/2016 09:12

Obviously I need to subtract Task1 from Task2 to get the time, but how can I write a query that looks at the next row?
any guidance is greatly appreciated.
0
Comment
Question by:JDCam
  • 2
  • 2
4 Comments
 
LVL 76

Accepted Solution

by:
slightwv (䄆 Netminder) earned 500 total points
ID: 41872166
LEAD allows you to peak at the next row.

If you want the results in minutes try this:
select job, start_time, (lead(start_time) over(order by start_time)-start_time) * 1440
from yourtable;

Open in new window

0
 

Author Comment

by:JDCam
ID: 41872230
Sounds great. I will read up on and try it out.
I assume it considers any order by clause to determine what the next row is.
Thanks
0
 
LVL 76

Expert Comment

by:slightwv (䄆 Netminder)
ID: 41872235
>>I assume it considers any order by clause to determine what the next row is.

Nope.  It uses the ORDER BY inside the LEAD call.
0
 

Author Closing Comment

by:JDCam
ID: 41877074
Works Great Thanks
0

Featured Post

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I remember the day when someone asked me to create a user for an application developement. The user should be able to create views and materialized views and, so, I used the following syntax: (CODE) This way, I guessed, I would ensure that use…
This post first appeared at Oracleinaction  (http://oracleinaction.com/undo-and-redo-in-oracle/)by Anju Garg (Myself). I  will demonstrate that undo for DML’s is stored both in undo tablespace and online redo logs. Then, we will analyze the reaso…
This video shows, step by step, how to configure Oracle Heterogeneous Services via the Generic Gateway Agent in order to make a connection from an Oracle session and access a remote SQL Server database table.
This video shows how to copy an entire tablespace from one database to another database using Transportable Tablespace functionality.

810 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question