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I have a column (notes) that is a string. This field is periodically updated and more information is appended to it. (Not my design). What I need to do is be able to look for the last date that is put into the string and then compare that date to see if it is between two other dates.
For the purposes of this question we can assume 1 table - table1 with 1 column - Notes.
A sample piece of data for the notes column would be...
blurb on 03/23/2004 by Someone blurb on 03/23/2004 by Someone blurb on 09/27/2004 by Someone Blurb on 09/27/2004 by Someone
Of course, I took the actual data out and replaced it with blurb to protect the innocent.
Hmm, I think that is the first date not the last (?). Please try this:
SELECT ... WHERE patindex('%[01][0-9]/[0123][0-9]/2[012][0-9][0-9]%', notes) > 0 --verify that a date pattern is present /* not sure what this does, it may still be needed and substring(notes, CHARINDEX (' on', notes, len(notes)-25)+4, 1) in ('0','1') */ -- find the *last* date pattern, convert it to a date, ... AND convert(datetime, substring(notes, len(notes) - (patindex('%[0-9][0-9][012]2/[0-9][0123]/[0-9][01]%', reverse(notes)) + 8), 10), 101) -- ... and compare it to the requested start and end dates BETWEEN @StartDate AND @EndDate
SET @StartDate = convert(datetime, '10/01/2006',101) SET @EndDate = convert(datetime, '06/30/2007',101)
set @notes = 'blurb on 03/23/2004 by Someone blurb on 03/23/2004 by Someone blurb on 09/27/2004 by Someone Blurb on 09/27/2004 by Someone' select convert(datetime, substring(@notes, len(@notes) - (patindex('%[0-9][0-9][012]2/[0-9][0123]/[0-9][01]%', reverse(@notes)) + 8), 10), 101) where patindex('%[01][0-9]/[0123][0-9]/2[012][0-9][0-9]%', @notes) > 0 --and convert(datetime, substring(@notes, len(@notes) - (patindex('%[0-9][0-9][012]2/[0-9][0123]/[0-9][01]%', reverse(@notes)) + 8), 10), 101) between @startdate and @enddate
ted, I'm a dba\network admin so my plate is kind of full. I'm plodding through a programming manual now but not enough time for this. My DB is relatively small so it returns pretty quick right now.
also, the and substring(notes, CHARINDEX (' on', notes, len(notes)-25)+4, 1) in ('0','1') was just a way to get rid of nulls and results with character since this the date is always the only number in the field and begins with 0 or 1. Not eloquent but it works. Thanks! I'll let you know how it goes..
