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Matching approximate dates between two queries

Posted on 2011-03-11
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Last Modified: 2013-12-25
Hello-

Is there sql that will allow for an approximate match on dates between two tables with a one-to-many relationship?

Essentially, this mimics the Microsoft Excel vlookup funtion using the 'True' designation of finding an approximate match.  I've attached a simple example.

Thanks!
Todd.  
EExchange.pdf
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Question by:TCristiano
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3 Comments
 
LVL 76

Accepted Solution

by:
GrahamSkan earned 63 total points
ID: 35113517
Not sure how approximate you need it. This requires the two dates to be within 100 days of each other. It produces the result that you show in the PDF.


SELECT Table1.[Asset Name], Table1.[Acquisition Date], Table1.Cost, Table2.Year, Table2.Index
FROM Table1, Table2
WHERE (Abs([Acquisition Date]-[Table2].[Year])<100);
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LVL 41

Assisted Solution

by:Sharath
Sharath earned 62 total points
ID: 35113622
Can you check this?
SELECT * 
  FROM Table1 AS t1, 
       Table2 AS t2 
 WHERE ABS(DATEDIFF(d,t1.Acquisition_Date,t2.Year)) = (SELECT MIN(ABS(DATEDIFF(d,t1.Acquisition_Date,t2.Year)))
                                                         FROM Table1 AS t3, 
                                                              Table2 AS t4 
                                                        WHERE t1.AssetName = t3.t1.AssetName 
                                                              AND t1.Acquisition_Date = t3.Acquisition_Date
                                                              AND t1.Cost = t3.Cost)

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Author Closing Comment

by:TCristiano
ID: 35131188
Thanks for the quick responses!
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