May 18, 2018 11:12 AM|PatriceSc|LINK
https://docs.microsoft.com/en-us/sql/t-sql/functions/datalength-transact-sql?view=sql-server-2017 on the SQL Server side or LENGTHC in Oracle:
Ah what happens if you try SELECT LENGTH(N'⻩'') in Oracle (I assume you can have a Unicode prefix ?). If you need further help a specialized Oracle forum might be perhaps better.