Add documentation about Parameterized queries

Author: adespawn

docs/source/statements/index.md

@@ -6,4 +6,5 @@
 prepared.md
 unprepared.md
 batch.md
+parameterized-queries.md
 ```

docs/source/statements/parameterized-queries.md

@@ -0,0 +1,33 @@
+<!-- This document is heavily based on the DSx driver documentation:
+https://docs.datastax.com/en/developer/nodejs-driver/4.8/features/parameterized-queries/index.html -->
+
+# Parameterized queries
+
+You can bind the values of parameters in a statement either by _position_ or by using _named_ markers.
+
+## Positional parameterized statements
+
+When using positional parameters, the query parameters must be provided as an Array.
+
+```javascript
+const statement = 'INSERT INTO artists (id, name) VALUES (?, ?)';
+// Parameters by marker position
+const params = ['krichards', 'Keith Richards'];
+await client.execute(statement, params, { prepare: true });
+```
+
+## Named parameterized statements
+
+You declare the named markers in your queries and use JavaScript object properties to define the parameters, with
+the `Object` property names matching the parameter names.
+
+```javascript
+const statement = 'INSERT INTO artists (id, name) VALUES (:id, :name)';
+// Parameters by marker name
+const params = { id: 'krichards', name: 'Keith Richards' };
+await client.execute(statement, params, { prepare: true });
+```
+
+Named parameters are case-insensitive.
+
+Currently named parameters are supported only in prepared statements.