what are the different parameters based on which @unique in Lotus Notes returns a unique value.?

Question

what are the different parameters based on which @unique in Lotus Notes returns a unique value.

Answer 1

In addition to other answers:

Multiple calls to @unique on the same machine will always return a unique answer, even if called repeatedly quicker than the time resolution would otherwise allow for. The counter will always be moved on.

Answer 2

The documentation is incorrect when it says that @Unique() returns a "random, unique text value". It is not random, and in fact there is no random component of the value. It is not guaranteed to be unique.

The return value of @Unique is based on the username and the date/time. The first four characters are: First letter of first name + First letter of last name + Second letter of last name + Last letter of last name. The final six characters are a date/time stamp with a resolution of 1 second. I do not know how the encoding for that works. This value will always increase with time.

Answer 3

Just use @Unique with no parameters and it will construct a unique value.

See the documentation

There is a slight chance that a duplicate value can be returned, if different users with similar names call this formula during the same second. This site discusses workarounds for that issue if that's important to you.