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Fetch the latest record from a table thru an SQL query


IBM Mainframe Forums -> DB2
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maxsubrat

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Joined: 27 Feb 2008
Posts: 108
Location: india

PostPosted: Tue Dec 01, 2015 7:13 pm
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Hi,

I want to fetch the latest record from a DB2 table based on one field PO create time stamp, thru an SQL query only.

Thanks
Subrat
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Nic Clouston

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Joined: 10 May 2007
Posts: 2432
Location: Hampshire, UK

PostPosted: Tue Dec 01, 2015 8:40 pm
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If it by an SQL query only why did you post a request for a sort solution in the sort forum?
Possibly:
Code:
Where TIMESTAMP = Max(Timestamp)

but you will have to do your due diligence in checking that.
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Rohit Umarjikar

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PostPosted: Tue Dec 01, 2015 9:18 pm
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or you can say..
Code:
Order by PO create time stamp DESC
fetch first 1 row only
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maxsubrat

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PostPosted: Wed Dec 02, 2015 11:10 am
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Suppose my table structure is like below:

ACT-ID PO-NBR ACT-TS
12 12345 2015-12-02-10-00-00-000000
12 12345 2015-12-02-09-00-00-000000
12 12345 2015-12-02-08-00-00-000000
15 99999 2015-12-01-04-00-00-000000
15 99999 2015-12-01-09-00-00-000000
25 12345 2015-12-03-09-00-00-000000
25 88888 2015-12-01-09-01-00-000000

I want to fetch the latest ACT-TS for each PO-NBR and ACT-ID in (12,15) only.
so my output data should be:

ACT-ID PO-NBR ACT-TS
12 12345 2015-12-02-10-00-00-000000
15 99999 2015-12-01-09-00-00-000000
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Rohit Umarjikar

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Joined: 21 Sep 2010
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PostPosted: Wed Dec 02, 2015 11:24 am
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Code:
Select acct-Id,po-nbr,max(act-to)
From table
Group by acc-Id,po-nbr
Order by 1,2
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maxsubrat

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Joined: 27 Feb 2008
Posts: 108
Location: india

PostPosted: Wed Dec 02, 2015 11:35 am
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suppose I have this type of record structure:

ACT-ID PO-NBR ACT-TS
02 12222 2015-12-12-10-00-00-000000
02 12222 2015-12-15-10-00-00-000000
10 19222 2015-12-12-10-00-00-000000
12 12345 2015-12-02-10-00-00-000000
12 12345 2015-12-02-09-00-00-000000
12 12345 2015-12-02-08-00-00-000000
15 99999 2015-12-01-04-00-00-000000
15 99999 2015-12-01-09-00-00-000000
25 12345 2015-12-03-09-00-00-000000
25 88888 2015-12-01-09-01-00-000000
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Rohit Umarjikar

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Joined: 21 Sep 2010
Posts: 2508
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PostPosted: Wed Dec 02, 2015 11:38 am
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Have tried first , what has given to you? Are you clear what would you want to achieve ?
If you want further help then provide us sample input, logic , output what yo want.

Add a Where condition to above sql,
Code:
Where act-id in  (12,15)
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maxsubrat

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Joined: 27 Feb 2008
Posts: 108
Location: india

PostPosted: Wed Dec 02, 2015 3:45 pm
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Thanks
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Nic Clouston

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PostPosted: Wed Dec 02, 2015 7:38 pm
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And PLEASE use the code tags when presenting data.
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