How to move a Daily Partition to a Monthly Partitioned Table
Community wiki answer:


  Is there a way, using the Partitioned Table, to merge the SwitchOut table that is on the filegroup Daily_2018_06_18_FG into the partition on Archive_Monthly_2018_06_01_FG?


No, you'll need to use INSERT...SELECT for row processing. MERGE/SPLIT/SWITCH DDL are partition level.