In Access 2010 I have a simple query (not append not update not delete) that is composed from three tables. Number of records is 30 -40 thousands, not big tables. Query runs fast (instant speed) when I use number field as criteria but when I use a text field (e.g. Last Name or similar as criteria it runs very slow it takes 1 minute or more to give result. All references are ok nothing missing.
Leading wildcards in a LIKE comparison are especially poor because the query engine can't optimize that AT ALL.
LIKE 'something*' can be a little better because the engine can truncate the field to the
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