I have datetime entries in a table and column name is datetime_entries. The values of column datetime_entries ={date1,date2,date3,date4,.....} All the entries are of different date but time is between 7AM to 8AM When I enter a new date for example datex+ with time 5PM then I have to find that this datetime entry doesn't belongs to the values of above column datetime_entries because of time difference. What method or algorithm I should have to use to find out that the new date i.e datex with time 5PM doesn't belongs

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