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Last 3 records by group

46 New Member
How can I retrieve the last 3 records from the following table. The table has the following fields and sample data:

ClientID TransactionID TransactionDate

1 6511216 01/02/2012
1 5332573 18/05/2011
1 9849528 11/02/2012
1 5374530 24/08/2010
1 5711675 26/04/2009
1 4001184 01/09/2011
2 9087526 15/07/2011
2 6524824 06/08/2009
2 5376892 26/07/2011
2 5327891 28/10/2008
2 6423568 11/11/2011
2 5379827 16/06/2012

the results should be (order by TransactionDate ):

ClientID TransactionID TransactionDate

1 4001184 01/09/2011
1 6511216 01/02/2012
1 9849528 11/02/2012
2 5376892 26/07/2011
2 6423568 11/11/2011
2 5379827 16/06/2012


Note: I can't use 'Select Top 3' a. because of the month format b. this must work for a table where TransactionDate is a different field with text data.
Feb 11 '12 #1
69 8570
yarbrough40
320 Contributor
if you know which client IDs you want ahead of time. you could use:
Expand|Select|Wrap|Line Numbers
  1. SELECT TOP 3 * FROM MyTable
  2. WHERE ClientID = 1
  3. UNION ALL
  4. SELECT TOP 3 * FROM MyTable
  5. WHERE ClientID = 2
  6. ORDER BY ClientID,TransactionDate
  7.  
  8.  
Feb 11 '12 #2
moishy101
46 New Member
I want the query to show all ClientId's (there are some 150000).
Feb 11 '12 #3
ADezii
8,834 Recognized Expert Expert
Shouldn't the results for Client# 1 be:
Expand|Select|Wrap|Line Numbers
  1. ClientID TransactionID TransactionDate
  2.     1       4001184      18/05/2011
  3.     1       6511216      01/02/2012
  4.     1       9849528      11/02/2012
Feb 11 '12 #4
ADezii
8,834 Recognized Expert Expert
There is a relatively simple solution using VBA, but I'll see what the SQL Gang comes up with first.
Feb 11 '12 #5
moishy101
46 New Member
@ADezii
ADezii,

You are right, my mistake.
Feb 11 '12 #6
NeoPa
32,584 Recognized Expert Moderator MVP
@Moishy101.
Unless and until you complete the question by explaining under which circumstances 'the last three' has meaning, we're left guessing what you mean. This is not a good way to proceed, so if you want meaningful help, then I suggest you clarify the question by explaining what you should have included in your original question.
Feb 12 '12 #7
ADezii
8,834 Recognized Expert Expert
@moishy101:
The key, as I see it, is NOT to perform a Secondary Sort on the [TransactionDate] itself since it must remain Text, but on the Expression
CDate([TransactionDate]). The Records that you want returned would be the 'BOTTOM' 3 for each ID ASC with CDate([TransactionDate]) ASC.
Feb 12 '12 #8
moishy101
46 New Member
@NeoPa:
I'm sorry but I don't understand what you meant when you wrote: "explaining under which circumstances 'the last three' has meaning"
the table contains thousands of records and I need a report to show the last 3 records for each id. What else can I write to clarify matters?
Feb 12 '12 #9
moishy101
46 New Member
@ADezii:
Your suggestion may work in the sample table but as I wrote "this must work for a table where TransactionDate is a different field with text data" I meant that TransactionDate is replaced by TransactionMont h who's values are Jan, Feb, Mar, Apr etc.
Feb 12 '12 #10

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