Counting Occurrences with SQL -- MIDRANGE-L

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I am have a data set that looks like the following:

BB8179 04/17/11 04/02/11
BE7214 04/17/11 04/02/11
BD9607 04/17/11 04/02/11
BB6382 04/17/11 04/02/11
BB7942 04/17/11 04/02/11
BE7487 04/17/11 04/02/11
BE7488 04/18/11 04/02/11
BE2178 04/18/11 04/02/11
BE1618 04/18/11 04/02/11
BE7489 04/18/11 04/02/11
BE2179 04/18/11 04/02/11
BD9608 04/21/11 04/02/11
BE2180 04/21/11 04/02/11
BE8955 04/21/11 04/02/11
BE1696 04/21/11 04/02/11

What I would like to do is count the unique occurrences of the first date column. Something like:

BB8179 04/17/11 1 04/02/11
BE7214 04/17/11 1 04/02/11
BD9607 04/17/11 1 04/02/11
BB6382 04/17/11 1 04/02/11
BB7942 04/17/11 1 04/02/11
BE7487 04/17/11 1 04/02/11
BE7488 04/18/11 2 04/02/11
BE2178 04/18/11 2 04/02/11
BE1618 04/18/11 2 04/02/11
BE7489 04/18/11 2 04/02/11
BE2179 04/18/11 2 04/02/11
BD9608 04/21/11 3 04/02/11
BE2180 04/21/11 3 04/02/11
BE8955 04/21/11 3 04/02/11
BE1696 04/21/11 3 04/02/11

Actually there are more columns involved here but this data set illustrates the challenge. Can't seem to wrap my head around the whole thing but I may need a subselect to get the count of the occurrences...

Thanks

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