How to secure any table/contents in a Database? What are the best security practices when it comes to Database?

Few steps to take for Database Security Solutions:

Database Level:

• Masking
• Tokenization
• Encryption

Access Level:

• Access Control Lists:
• Permissions

Perimeter Level:

• Firewalls
• Virtual Private Networks

https://www.geeksforgeeks.org/control-methods-of-database-security/

Grant table-level permissions in SQL Server https://chartio.com/learn/databases/grant-sql-server-table-permissions/