diff --git a/code/Structured_APIs-Chapter_6_Working_with_Different_Types_of_Data.py b/code/Structured_APIs-Chapter_6_Working_with_Different_Types_of_Data.py
index ed4168d..6832e34 100644
--- a/code/Structured_APIs-Chapter_6_Working_with_Different_Types_of_Data.py
+++ b/code/Structured_APIs-Chapter_6_Working_with_Different_Types_of_Data.py
@@ -310,13 +310,13 @@ def color_locator(column, color_string):
 
 # COMMAND ----------
 
-df.select(map(col("Description"), col("InvoiceNo")).alias("complex_map"))\
+df.select(create_map(col("Description"), col("InvoiceNo")).alias("complex_map"))\
   .selectExpr("complex_map['WHITE METAL LANTERN']").show(2)
 
 
 # COMMAND ----------
 
-df.select(map(col("Description"), col("InvoiceNo")).alias("complex_map"))\
+df.select(create_map(col("Description"), col("InvoiceNo")).alias("complex_map"))\
   .selectExpr("explode(complex_map)").show(2)
 
 
@@ -331,7 +331,7 @@ def color_locator(column, color_string):
 from pyspark.sql.functions import get_json_object, json_tuple
 
 jsonDF.select(
-    get_json_object(col("jsonString"), "$.myJSONKey.myJSONValue[1]") as "column",
+    get_json_object(col("jsonString"), "$.myJSONKey.myJSONValue[1]").alias("column"),
     json_tuple(col("jsonString"), "myJSONKey")).show(2)
 
 
diff --git a/code/Structured_APIs-Chapter_7_Aggregations.py b/code/Structured_APIs-Chapter_7_Aggregations.py
index a6155f7..daf3224 100644
--- a/code/Structured_APIs-Chapter_7_Aggregations.py
+++ b/code/Structured_APIs-Chapter_7_Aggregations.py
@@ -179,3 +179,6 @@
 
 # COMMAND ----------
 
+pivoted.where("date > '2011-12-05'")\
+  .select("date", "`USA_sum(CAST(Quantity AS BIGINT))`")\
+  .show()