Aggregates / minDate

minDate(dataset, columnIndex OR date, date...)

Finds and returns the minimum date in the given column of the given dataset, or the min value in a series of dates specified as arguments. When looking up the min date in a dataset, the column may be specified as an index or as a column name. Any null values in the column are ignored. If there are no rows in the dataset, null is returned.

For example, suppose you had a Table with this dataset in it:

You could use this expression to get the date and time for the oldest alert:

minDate({Root Container.Table.data}, "AlertTime")