Update a list item with multi-select fields
Updates multi-select Lookup or Person/Group fields on an existing item.
UPDATE MyList
SET Title = 'Elizabeth Johnson',
--Method#1 (Pass type info in the same value)
ManyPersonsLookupId = '[11,22,33]', "fields.ManyPersonsLookupId@odata\u002Etype" = 'Collection(Edm.Int32)'
--Method#2 (Pass type info via ODataField)
--OR--
--ManyPersonsLookupId = '[11,22,33]',
--ManyPersonsLookupIdODataType" = 'Collection(Edm.Int32)
WHERE Id = '123'