DOCSP-29805: no query criteria in find (#681)

* DOCSP-29805: find op with no/empty query document

* wording fixes

* replace refs while im here

* DB PR fixes 1

(cherry picked from commit a4883c9)
(cherry picked from commit 6a8994c)
(cherry picked from commit 723cb73)

Author: rustagir

source/fundamentals/crud/read-operations/retrieve.txt

@@ -26,10 +26,10 @@ from the existing set of data, you can use a find operation such as the
 You can also further specify the information you are requesting by
 including additional parameters or by chaining other methods such as:
 
-- :doc:`Sort Results </fundamentals/crud/read-operations/sort>`
-- :doc:`Skip Returned Results </fundamentals/crud/read-operations/skip>`
-- :doc:`Limit the Number of Returned Results </fundamentals/crud/read-operations/limit>`
-- :doc:`Specify Which Fields to Return </fundamentals/crud/read-operations/project>`
+- :ref:`node-fundamentals-sort`
+- :ref:`node-fundamentals-skip`
+- :ref:`node-fundamentals-limit`
+- :ref:`node-fundamentals-project`
 
 You can also use an aggregation operation to retrieve data. This type of
 operation allows you to apply an ordered pipeline of transformations to the
@@ -44,11 +44,41 @@ matching data is inserted.
 Find
 ----
 
-The ``find()`` method is called on the ``Collection`` object that
-references the collection you want to query. The method accepts a query
-document that describes the documents you want to retrieve. For more
-information on how to specify your query document, see our guide on
-how to :doc:`Specify a Query </fundamentals/crud/query-document>`.
+You can call the ``find()`` method on a ``Collection`` object. The
+method accepts a query document that describes the documents you want to
+retrieve. For more information on how to specify your query document,
+see the :ref:`node-fundamentals-query-document` guide.
+
+.. tip:: No Query Criteria
+   
+   To execute a find operation that has no query criteria, you can
+   pass an empty query or omit the query document in your find
+   method parameters.
+
+   The following operations both return all documents in the
+   ``myColl`` collection:
+
+   .. code-block:: javascript
+
+      await myColl.find(); // no query
+      await myColl.find({}); // empty query
+   
+   If you don't pass a query or pass an empty query
+   to the ``findOne()`` method, the operation returns a single
+   document from a collection.
+
+   You can specify options in a find operation even when you pass an
+   empty query. For example, the following code shows how you can
+   specify a projection as an option while executing a find operation
+   with an empty query parameter:
+
+   .. code-block:: javascript
+
+      const options = {
+        projection: { _id: 0, field1: 1 },
+      };
+
+      const findResult = await myColl.findOne({}, options);
 
 To access the results, you can optionally pass a callback in the method
 call or resolve the returned ``Promise`` object. See our guide on
@@ -71,15 +101,13 @@ matching document or ``null`` if there are no matches.
       :start-after: start find crud example
       :end-before: end find crud example
 
-
    Once the operation returns, the ``findResult`` variable references a
    ``Cursor``. You can print the documents retrieved using the ``forEach()``
    method as shown below:
 
    .. code-block:: javascript
 
-      await cursor.forEach(console.dir);
-
+      await findResult.forEach(console.dir);
 
    The output might resemble the following:
 
@@ -92,8 +120,8 @@ matching document or ``null`` if there are no matches.
         ...
       ]
 
-See the :doc:`find() </usage-examples/find>` and :doc:`findOne()
-</usage-examples/findOne>` for fully-runnable examples.
+See the :ref:`find() <node-usage-find>` and :ref:`findOne()
+<node-usage-findone>` for fully-runnable examples.
 
 Aggregate
 ---------
@@ -115,15 +143,13 @@ group, and arrange the result data from a collection.
       :start-after: start aggregate crud example
       :end-before: end aggregate crud example
 
-
    Once the operation returns, the ``aggregateResult`` variable references a
    ``Cursor``. You can print the documents retrieved using the ``forEach()``
    method as shown below:
 
    .. code-block:: javascript
 
-      await cursor.forEach(console.dir);
-
+      await aggregateResult.forEach(console.dir);
 
    The output might resemble the following:
 
@@ -165,4 +191,4 @@ data whenever write operations are executed on the collection.
 
 
 For a runnable example of the ``watch()`` method using the NodeJS driver, see
-the :doc:`change streams </usage-examples/changeStream>` usage example.
+the :ref:`change streams <node-usage-watch>` usage example.