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SQL query to count records before they change

rwallacej
rwallacej asked
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Last Modified: 2012-05-06
Hi

I have a problem with SQL query.   I want to display the first record and the number of times a value is duplicated before the next uniqu record. An example of input data

date field   value         other fields.....
---------------------------------------
01:00       1234        
01:01       1234
01:02       1234
01:03       654
01:04        321
01:05        321
01:06        1234

The results I would like to display:

Date field                           Value        Count of records
(first time value occurs)
----------------------------------------
01:00                                 1234              3
01:03                                 654              1
01:04                                 321              2
01:06                                 1234            1

Not that I don't want a count of e.g. 1234 over all record set but counts as the values change

Thank-you in advance for help in SQL.
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