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Messages 1 to 6 of 6 total |
SQL, GROUP BY and show highest date detail record |
Tue, Jun 2 2015 1:10 PM | Permanent Link |
B Shelton | I need my query to show 1 record but not the one with the highest date.
SELECT Master.MasterID, Detail.DetailDate, Detail.DetailBalance FROM Master, Detail WHERE Master.MasterID = Detail.MasterID GROUP BY Master.MasterID ORDER BY Detail.DetailDate DESC Data for detail is like this DetailID MasterID DetailDate DetailBalance 1 1 6/2/2015 200 2 1 6/3/2015 300 3 1 6/1/2015 100 result is MasterID DetailDate DetailBalance 1 6/2/2015 200.00 I want it to show MasterID DetailDate DetailBalance 1 6/3/2015 300.00 Thanks for any help Brent |
Wed, Jun 3 2015 3:10 AM | Permanent Link |
Roy Lambert NLH Associates Team Elevate | Brent
In this case you've picked the second item, is that always the case, what if detail contains 4 rows, 7 rows etc. Is the criteria the biggest detail balance which is what you've show here More info needed before an answer can be attempted Roy Lambert |
Wed, Jun 3 2015 6:04 AM | Permanent Link |
Jose Eduardo Helminsky HPro Informatica | Brent Shelton
<< SELECT Master.MasterID, Detail.DetailDate, Detail.DetailBalance FROM Master, Detail WHERE Master.MasterID = Detail.MasterID GROUP BY Master.MasterID ORDER BY Detail.DetailDate DESC >> When you put "order by" you define the order to show and does not matter if it will show one or more records. You have to use more criteria for data filtering (in the where clause) or add more fields in the order by. Like Roy said, we need more details to help you. |
Wed, Jun 3 2015 7:40 AM | Permanent Link |
Roy Lambert NLH Associates Team Elevate | Jose
Whilst reading your post I had a thought - is this the old problem with which non grouped data is returned from a GROUP BY Roy Lambert |
Wed, Jun 3 2015 2:59 PM | Permanent Link |
B Shelton | >>
In this case you've picked the second item, is that always the case, what if detail contains 4 rows, 7 rows etc. Is the criteria the biggest detail balance which is what you've show here More info needed before an answer can be attempted << Sorry, in my original post I meant to say I want to show one record for each MasterID with the detail record being the one with the highest date. When records are being entered, I am not allowing a duplicate date. |
Thu, Jun 4 2015 3:35 AM | Permanent Link |
Roy Lambert NLH Associates Team Elevate | Brent
>In this case you've picked the second item, is that always the case, what if detail contains 4 rows, 7 rows etc. >Is the criteria the biggest detail balance which is what you've show here >More info needed before an answer can be attempted ><< > >Sorry, in my original post I meant to say I want to show one record for each MasterID with the detail record being the one with the highest date. When records are being entered, I am not allowing a duplicate date. OK this is the GROUP BY problem. GROUP BY does not guarantee which details are returned apart from the grouped ones. I think its based on the physical order of the rows but it could be anything. Its a question that's been asked quite a few times. Just search this news group for GROUP BY Roy Lambert |
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