Create table

Let say you just want to quickly test and validate your query with a small set of data, or you want to write a set of data and use that with some other data tables. How do we do that?
Example 1
datatable (Date: datetime, Event: string) [
datetime(1910-06-11), "Born",
datetime(1930-01-01), "Enters Ecole Navale",
datetime(1953-01-01), "Published first book",
datetime(1997-06-25), "Died"
Last modified 1yr ago