We can also add or subtract date time from current date time. For example, for adding 2 days in current datetime, we can add another parameter to DATETIME function.
Similarly for subtracting 2 months from the current date, we can write the query below.
For positive numbers putting + before the number is optional.
We can add more than one modifiers to a DATETIME function. Let's say we have to get the datetime timestamp of +3 years to the current localtime.
There are more modifiers like 'Start of Day', 'Start of Month', 'Start of Year'.
These can be used to get the timestamps of start of day, month and year relative to the current timestamp.