Combines the rows whose Period values either meet or overlap so that the resulting normalized row contains the earliest beginning bound and the latest ending bound from the Period values of all the rows involved.
Result Type
This function returns result rows with the columns specified in the RETURNS clause as follows:
- The grouping columns specified in the input argument.
- The Period column with normalized Period values.
- An optional INTEGER column containing the count of the rows that were normalized because their Period values meet.