Docsp-20523 review sql on merge out page (#557)

* OCSP-20523 update sql code

* rearrange code blocks in list

* fix tense

* add the

* add copyable false

* complete select statements

* remove following

Author: ianf-mongodb

source/reference/operator/aggregation/out.txt

@@ -123,15 +123,32 @@ following summarizes the capabilities of the two stages:
          however, can be sharded.
      - - Can output to a sharded collection. Input collection can
          also be sharded.
-   * - - Corresponds to SQL statements:
-
-         - ``INSERT INTO T2 SELECT FROM T1``
-         - ``SELECT INTO T2 FROM T1``
-     - - Corresponds to SQL statements:
-     
-         - ``MERGE``
-         - ``INSERT INTO T2 SELECT FROM T1``
-         - ``SELECT INTO T2 FROM T1``
+   * - - Corresponds to the SQL statements:
+
+         - .. code-block:: sql
+              :copyable: false
+
+              INSERT INTO T2 SELECT * FROM T1
+
+         - .. code-block:: sql
+              :copyable: false
+
+              SELECT * INTO T2 FROM T1
+
+     - - Corresponds to the SQL statement:
+
+         -  .. code-block:: sql
+               :copyable: false
+
+               MERGE T2 AS TARGET
+               USING (SELECT * FROM T1) AS SOURCE
+               ON MATCH (T2.ID = SOURCE.ID)
+               WHEN MATCHED THEN
+                 UPDATE SET TARGET.FIELDX = SOURCE.FIELDY
+               WHEN NOT MATCHED THEN
+                 INSERT (FIELDX)
+                 VALUES (SOURCE.FIELDY)
+
          - Create/Refresh Materialized Views
 
 Behaviors