REST-88: Add database standards

[SindhuBalla]

• Added SQL guidelines & best practices
• Added Microsoft SQL server guidelines & best practices
• Added Database Security Measures reference link

[osm-vishnukyatannawar]

I see that we are adding link for https://blog.sqlauthority.com/2007/06/04/sql-server-database-coding-standards-and-guidelines-part-1/

This blog is very old I see it says 16 years ago.

I am also just worried that this website might go down unlike microsoft and all. If possible can we not copy stuff from that website and add that as part of this coding standard instead of redirecting to link.

[SindhuBalla]

I see that we are adding link for https://blog.sqlauthority.com/2007/06/04/sql-server-database-coding-standards-and-guidelines-part-1/

This blog is very old I see it says 16 years ago.

I am also just worried that this website might go down unlike microsoft and all. If possible can we not copy stuff from that website and add that as part of this coding standard instead of redirecting to link.

Moved the content into the md file