[R] Query an Access database based on a date attribute (Tudor Bodea)
Prof Brian Ripley
ripley at stats.ox.ac.uk
Tue Nov 13 19:26:28 CET 2007
On Tue, 13 Nov 2007, Baize, Harold wrote:
> Tudor Bodea asked:
>
>> In this context, I try to get all the records for which market is atl-bos,
>> competitor is delta and dd is 2007-11-20 (first record above). To do this I used
>
>>> # channel <- odbcConnectAccess("test.mdb")
>>> res <- sqlQuery(channel, "select * from test_table where market = 'atl-bos'
>>> and competitor = 'delta' and dd = 2007-11-20")
>
>> Does any of you know what it is going on?
>
> Try this:
>
> res <- sqlQuery(channel, "select * from test_table
> where market = 'atl-bos'and competitor = 'delta' and dd = {d '2007-11-20'}")
>
> Microsoft variant of SQL has an odd date syntax. I tried a dozen things before
> I found what worked.
You could have asked RODBC: sqlTypeInfo() tells you what quote pairs to
use with each type for the current DBMS.
--
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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