I suppose it depends on their current knowledge base.  At a very beginning level I'd start with set theory:
https://www.mathsisfun.com/sets/venn-diagrams.html
If they don't understand sets properly, then anything...

As for being an introvert vs extrovert, I find I very wildly depending on the individual or group of people I'm dealing with.  There's some people I've known for years...

another free option is the open source program Dia:
http://dia-installer.de/
I've used it when I didn't have Visio available, or when Visio seemed like overkill for what I...

If you already have separate tables for staff, contacts, and companies, then it probably makes logical sense to stay consistent and have 3 separate link tables.  While it is possible...

here's an interesting article originally from the SQL Server Customer Advisory Team about this topic:
https://blogs.msdn.microsoft.com/sqlcat/2013/11/20/sql-server-2012-alwayson-high-availability-and-disaster-recovery-design-patterns/

I worked at a company in the late 90's that still required a button down shirt and tie every day for the men.  Of course the women's dress code was...

Microsoft recommends you always use ArithAbort ON: https://docs.microsoft.com/en-us/sql/t-sql/statements/set-arithabort-transact-sql#remarks

If ArithAbort setting is different between Management Studio (defaults to ON) and your application (may be defaulted to OFF), there...