Oracle TO_TIMESTAMP Function Guide

The TO_TIMESTAMP function in Oracle database is used to convert a string expression into a value of date and time type. Its syntax is as follows:

TO_TIMESTAMP(string, format)

In this case, string is the string expression to be converted, and format is the date-time formatting pattern. For example, you can use the following code to convert a string into a date-time value:

SELECT TO_TIMESTAMP('2021-09-20 12:30:45', 'YYYY-MM-DD HH24:MI:SS') FROM dual;

This will convert the string ‘2021-09-20 12:30:45’ into a value of date and time type, and return the result. It is important to ensure that the format of the string and the date and time formatting pattern match when using the TO_TIMESTAMP function, as mismatched formats could lead to conversion failure.