Groups > comp.databases.ms-sqlserver > #975

Re: Database query -- how to?

From	bradbury9 <ray.bradbury9@gmail.com>
Newsgroups	comp.databases.ms-sqlserver
Subject	Re: Database query -- how to?
Date	2012-04-12 04:10 -0700
Organization	http://groups.google.com
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El jueves, 12 de abril de 2012 11:38:36 UTC+2, Gerd Brix  escribió:
> Am Donnerstag, 12. April 2012 11:28:32 UTC+2 schrieb bradbury9:
> > El jueves, 12 de abril de 2012 10:02:09 UTC+2, Gerd Brix  escribió:
> [...]
> > > There's a SQL Server Express with the following table:
> > > 
> > > ID     TIME
> > > ----------------
> > > 1       8:00
> > > 1       7:45
> > > 2       6:00
> > > 3       5:00
> > > 2       7:59
> > > 
> > > What I need to find out is the last time entered for all given IDs.
> > > That means:
> > > ID     TIME
> > > ----------------
> > > 1      8:00
> > > 2      7:59
> > > 3      5:00
> > > 
> > > Can someone please help me with this?
> > > 
> [...] 
> > In case the column TIME is DateTime type:
> > Select max(TIME) from TableName
> > 
> [...]
> 
> Not really :-(  This only delivers the latest entry. What I need is the latest entry for each ID. The example result shows this: 3 rows instead of only 1.
> 
> -gerd

select [id], max(time) as latestTime from tableName group by [id]

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Thread

Database query -- how to? Gerd Brix <gbrix@gmx.de> - 2012-04-12 01:02 -0700
  Re: Database query -- how to? bradbury9 <ray.bradbury9@gmail.com> - 2012-04-12 02:28 -0700
    Re: Database query -- how to? Gerd Brix <gbrix@gmx.de> - 2012-04-12 02:38 -0700
      Re: Database query -- how to? bradbury9 <ray.bradbury9@gmail.com> - 2012-04-12 04:10 -0700
  Re: Database query -- how to? Erland Sommarskog <esquel@sommarskog.se> - 2012-04-12 11:10 +0000
    Re: Database query -- how to? Gerd Brix <gbrix@gmx.de> - 2012-04-12 04:33 -0700

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