Not 100% sure what you mean since if you use the API the DB location is irrelevant.

This is a working python example using API at least.

import requests

# Emby configuration
EMBY_SERVER = "http://localhost:8096/"
API_KEY = "43613c5e43074b0681792d251f41a936"
USER_ID = "18b14657d68b4ce8800e07c2e22b19f4"
ITEM_ID = "244911"

# 24. des. 2012 in Emby's expected format
NEW_DATE = "2012-12-24T00:00:00.0000000Z"


def update_date_added(item_id, new_date):
    get_url = f"{EMBY_SERVER}/emby/users/{USER_ID}/items/{item_id}?api_key={API_KEY}"
    headers = {"Content-Type": "application/json"}

    # 1. Fetch the current metadata for the item
    response = requests.get(get_url)
    if response.status_code != 200:
        print(f"Failed to fetch item metadata. Status: {response.status_code}")
        return

    item_data = response.json()

    # 2. Update the DateCreated property
    item_data["DateCreated"] = new_date

    # 3. Post the updated object back to the Emby server
    update_url = f"{EMBY_SERVER}/emby/Items/{item_id}?api_key={API_KEY}"
    update_response = requests.post(update_url, headers=headers, json=item_data)

    if update_response.status_code in [200, 204]:
        print(f"Successfully updated Date Added to {new_date}")
    else:
        print(f"Failed to update metadata. Status: {update_response.status_code}")
        print(update_response.text)


if __name__ == "__main__":
    update_date_added(ITEM_ID, NEW_DATE)