After I provision a SQL Azure Single DB - with a Global Admin login/password - can it be changed after the initial deployement via SQL Scripts?
Can the passwords for the SQL logins/user created by the above Global Admin - be changed/reset after the initial deployment or setup via SQL Scripts?
RESET PASSWORD FOR SERVER ADMIN
You can do this after initial deployment through any of these - Azure Portal, AZURE CLI, PowerShell or SQL Scripts
SQL
Azure PORTAL
Go to Azure portal, click SQL Servers, select the server from the list, and then click Reset Password.
RESET PASSWORD FOR OTHER USERS/LOGIN
Yes, You can do this after initial deployment through SQL Scripts.
Traditional model users
Contained Database model users
See these links for more details:
Contained and Traditional Model Users Syntax Differences
Azure SQL Logins and Users