Microsoft SQL Server 2016 Updates / RTM (13.0.1601.5) / SP1 (13.0.4001.0 or 13.1.4001.0) / SP2 (13.0.5026.0 or 13.2.5026.0) / SP3 (13.0.6300.2 or 13.3.6300.2) - SQL Server Blog
Can't upgrade SQL Server 2016 SP2-CU15-GDR to 2016SP3-KB5003279 - Microsoft Q&A
SQL server version differences - Database Administrators Stack Exchange
SQL Server Express LocalDB | notes on end user computing