[AccessD] More in Queries and Memo Fields

Dan Waters df.waters at comcast.net
Tue Jul 12 14:34:20 CDT 2011


>From Allen Browne’s site: (http://allenbrowne.com/QueryPerfIssue.html)

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This makes a major difference with Memo fields. If you GROUP BY a memo
(Notes in the example), Access compares only the first 255 characters, and
the rest are truncated! By choosing First instead of Group By, JET is free
to return the entire memo field from the first match. So not only is it more
efficient; it actually solves the the problem of memo fields being chopped
off.

(A downside of using First is that the fields are aliased,
e.g. FirstOfNotes.)
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Dan






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