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ORA-01843: not a valid month

 
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Hi,


Regards,
Jaya
 
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Your LAST_MODIFIED_TIME is (presumably) a date-time, but you are comparing it with character values from your TO_CHAR functions. Leave all the dates as dates and it should work. Also, you can use "BETWEEN date1 AND date2" to catch dates inside a range.
 
Consider Paul's rocket mass heater.
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