Hi @alex1368 , I’m not really certain what you are asking but I’m going to assume that you are wanting to access database nodes but cannot see them on your version of KNIME.
The general database nodes are all included with KNIME without further downloading required (although for specific database such as MS SQL Sever and Oracle, and some others you would normally need to download extensions).
If you cannot see the regular database nodes, take a look at this link:
If that doesn’t help, can you reframe your question. Also which version of KNIME are you using?