"Knowledge of" vs. "Knowledgeable in"

Solution 1:

According to the Corpus English:

I have knowledge of navigating through large databases.

I have knowledge in navigating through large databases.

OR

I am knowledgeable in navigating through large databases.

Knowledge is one thing:

2. Familiarity, awareness, or understanding gained through experience or study:

I have knowledge of navigating through large databases.

Experience is another:

2.a. Active participation in events or activities, leading to the accumulation of knowledge or skill:

2.b. The knowledge or skill so derived.

I have experience in navigating through large databases.

Expertise still another:

1. special skill, knowledge, or judgment; expertness

I have expertise in navigating through large databases.

Solution 2:

Whichever way you choose, you should remain consistent throughout your document. I am assuming this is going to be presented as part of a bulleted list. Each item in the bulleted list should be a continuation of the same sentence fragment. For example, each of these bullet points run off the fragment: "I have the":

• Knowledge of navigating through large databases
• Ability to brew excellent coffee
• Milkshakes that bring all the boys to the yard

Each of these bullet points run off the fragment: "I am":

• Knowledgeable in navigating through large databases
• Skilled at brewing excellent coffee
• Capable of having milkshakes that bring all the boys to the yard

The choice is yours; just ensure that all your bullet points continue the same fragment.

Solution 3:

Maybe for a clearer, yet still formal sentence you could try

Knowledgeable in the navigation of large databases.

or even

Knowledgeable in the navigation of vast amounts of information in large databases.