adding SQL DB tutorial files to support this tutorial: https://learn.microsoft.com/en-us/azure/azure-sql/database/design-first-database-tutorial?view=azuresql

Update README.md 

Update README.md 

Update README.md 

Update README.md 

Update README.md 

Update README.md 

Updating screenshot 

Revert "Revert "Merge branch 'master' of https://github.com/Microsoft… …/sql-server-samples"" This reverts commit e2a931b.

Merge pull request microsoft#303 from nulllogicone/master Fix typo