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Term: TO_DATE. Definition: The Oracle TO_DATE function will convert either a character string or an expression into a date value. Example Syntax. These all show valid date formats for February 16th, 2009: to_date('16-Feb-09', 'DD-Mon-YY') to_date('02/16/09', 'MM/DD/YY') to_date('021609', 'MMDDYY')
Using date and time functions. Date and time functions are the most important functions as the main data context of analysis is time. Date and time functions can convert dates into time portions, calculate time differences between dates, and be the basis for advanced time filtering, such as current week, last month, and other time portions.