The arguments for the method are:
| Arguments | Description | 
|---|---|
| [ in]value | A Variantof typeString,Date, orOraTimeStampTZ. | 
| [[ in] [optional]format | Specifies the TIMESTAMPWITHTIMEZONEformat string to be used to interpret value whenvalueis typeString. Ifformatis not specified,valueis interpreted using theFormatproperty of the currentOraTimeStampTZobject. | 
Returns a Boolean value: The value is True if the OraTimeStampTZ object is less than the argument; otherwise, it is False. IsLess only compares the UTC date-time values stored in the OraTimeStampTZ object; the time zone information is ignored.
If value is of type String, the string format must match the format specified in the format argument. If format is not specified, the string format must match the Format property of the current OraTimeStampTZ object.
If value is of type Date, the date-time value in Date is interpreted as the date-time value in the time zone of the session.