Deleting Similar Records Within 1 Second Time Frame!!

Apr 22, 2006

Hi guys,
need your help again with the following problem i'm having. I'll give an example to make the problem clear.
I have a table, eg table 1 with the following records:
Tag________Desc________Msgno____DateTime
016GB001___Alarm OFF___1403______21/4/06 11:02:02
016GB001___Alarm OFF___1605______21/4/06 11:02:02
034GB005___Alarm ON____1403______21/4/06 11:02:04
016GB001___Alarm ON____1403______21/4/06 11:02:07
016GB001___Alarm ON____1605______21/4/06 11:02:07
048GB001___Alarm OFF___1403______21/4/06 11:05:31
048GB001___Alarm OFF___1605______21/4/06 11:05:32
048GB001___Alarm ON____1403______21/4/06 11:06:51
048GB001___Alarm ON____1605______21/4/06 11:06:52

I need a query that looks at records with similar Tag fields that occur with a 1 second difference between them and deletes those with "1403" in the Msgno field. I'm a newbie and i've got no idea where to start. The query should return the following records:
I have a table, eg table 1 with the following records:
Tag________Desc________Msgno____DateTime
016GB001___Alarm OFF___1605______21/4/06 11:02:02
034GB005___Alarm ON____1403______21/4/06 11:02:04
016GB001___Alarm ON____1605______21/4/06 11:02:07
048GB001___Alarm OFF___1605______21/4/06 11:05:32
048GB001___Alarm ON____1605______21/4/06 11:06:52

I hope the problem is clear. I know this is going to be one heck of a challenge, and i'm not sure whether this can actually be done in access!! Anyhelp from anybody would be enormously appreciated. Hope to see a solution soon!!

Kind regards,
Monty

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