What sources of knowledge are most effective in developing towards DBA?

Question

SQL

I understand that first of all, personal experience will help. But still, I would like to more systematically acquire knowledge that would help in the analysis of practical problems.
Maybe there are good books or courses?

Answer 1

dba is mssql orcale
they have books and docks + certification in this direction and we need to move

Answer 2

I can recommend these books:
www.amazon.com/dp/0321210255
www.amazon.com/dp/1558608206