What is the purpose of these number signs around date value type?

Question

Can anyone explain the correct usage/requirement of using these \'#\' number signs. Do they simply have to surround any date type in SQL?

Thanks

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Answer 1

These are the MS Access syntax for date constants.

In most other databases, you just use a string to represent a date. In my opinion, you should use one of the ISO standard formats for this (either YYYYMMDD or my preference YYYY-MM-DD). So a valid date in most databases would be '2014-01-01'. In Access, this can be written #2014-01-1#.

Answer 2

I suppose that is a vendor specific SQL modification. If I am not mistaken, that is specific for MS Access databases that the date should be delimited with a hash.