The following link is for the MS SQL Server 2019 books/documentation on the Internet:
http://msdn.microsoft.com/en-us/library/bb545450.aspx
A trained DBA will already be familiar with this information but you can visit this Web pages to learn what is best for you.
Note: This information is also available in the MS SQL Server 2019 Online Books, which can be installed on a local server or workstation.