SQL Server Tutorial - Understanding data types

this explained what i have been searching for in clear tune. Appreciate this tutorial so much.

this is very good and nice explained.

But what's the point of specifying the size of string length? For example, nvarchar(10) my program works well and nvarchar(100) my program works well too? So do i need to care about that or there's something im wrong about?

Very vocal and informative. thank you very much

Very good i am indeed learning from you!

Excellent  video, very informative, voice is clear and covers the subject.
I give it five stars of rating.    Thank you very much.

thank you so much for this video! I have been struggling to understand the textbook on SSMS and with your in depth tutorial, i feel like i can tackle this head on! Thanks so much!!

Nice and to point