SQL query added

Author: tirthajyoti

Dataframe_SQL_query.ipynb

@@ -208,7 +208,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "### Run a slightly more complex query\n",
+    "### Run slightly more complex queries\n",
     "How many entries in the `Close` field are higher than 500?"
    ]
   },
@@ -234,6 +234,35 @@
     "count_greater_500 = spark1.sql(\"SELECT COUNT(Close) FROM stock WHERE Close > 500\").show()"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "What is the average `Open` values of all the entries where `Volume` is either greater than 120 million or less than 110 million?"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 36,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "+------------------+\n",
+      "|         avg(Open)|\n",
+      "+------------------+\n",
+      "|309.12406365290224|\n",
+      "+------------------+\n",
+      "\n"
+     ]
+    }
+   ],
+   "source": [
+    "avg_1 = spark1.sql(\"SELECT AVG(Open) FROM stock WHERE Volume > 120000000 OR Volume < 110000000\").show()"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},