update for occi

Author: XiaoyuMSFT

articles/sql-data-warehouse/TOC.yml

@@ -139,6 +139,12 @@
       items:
       - name: Performance tuning guidance  
         href: performance-tuning-ordered-CCI.md
+      - name: Create table
+        href: https://docs.microsoft.com/en-us/sql/t-sql/statements/create-table-azure-sql-data-warehouse?view=aps-pdw-2016-au7
+      - name: CTAS   
+        href: https://docs.microsoft.com/en-us/sql/t-sql/statements/create-table-as-select-azure-sql-data-warehouse?view=aps-pdw-2016-au7
+      - name: Create and change index
+        href: https://docs.microsoft.com/en-us/sql/t-sql/statements/create-index-transact-sql?view=sql-server-2017#examples--and- 
     - name: Result set caching
       items:
       - name: Set for a database
@@ -218,7 +224,13 @@
     - name: Troubleshoot
       href: sql-data-warehouse-troubleshoot.md
   - name: Maintenance schedules
-    href: maintenance-scheduling.md
+    items:
+    - name: Overview
+      href: maintenance-scheduling.md
+    - name: View maintenance schedule
+      href: viewing-maintenance-schedule.md
+    - name: Change maintenance schedule
+      href: changing-maintenance-schedule.md
   - name: Integration
     items:
     - name: Overview