Update repo

Author: smazcw3

.gitignore

@@ -9,3 +9,9 @@
 *.crc
 *.parquet
 */*/_SUCCESS
+
+# Venv
+.venv/
+
+# System
+.DS_Store

01-HelloSpark/README.md

@@ -0,0 +1,68 @@
+Setting up the Apache Spark on Visual Code IDE
+----------------------------------------------
+
+1. Create virtual environment (`.venv`) for the project.
+2. Install pyspark to the virtual environment using `pip install pyspark`
+
+
+Reading csv data using spark
+----------------------------
+```
+spark_df = spark.read
+            .format("csv")
+            .option("header", "true")
+            .option("inferSchema, "true")
+            .load("/databricks-datasets/learning-spark-v2/sf-fire/sf-fire-calls.csv")
+```
+
+Reading csv data using spark csv method
+---------------------------------------
+```
+spark_df = spark.read
+            .csv("/databricks-datasets/learning-spark-v2/sf-fire/sf-fire-calls.csv", 
+            header="true", 
+            inferSchema="true")
+```
+
+Creating globalTemporaryView of the dataframe
+---------------------------------------------
+```
+spark_df.createGlobalTempView("fire_service_calls_view")
+```
+
+With this view, we can run Sql queries such as
+```
+select * from global_temp.fire_service_calls_view
+```
+
+Creating database
+-----------------
+```
+create database if not exists demo_db
+```
+
+Create Table
+------------
+```
+create table if not exists demo_db.fire_service_calls_tbl(
+    CallNumber integer,
+    UnitID string,
+    IncidentNumber integer,
+    CallType: string
+) using parquet
+```
+
+Insering data into table
+------------------------
+```
+insert into demo_db.fire_service_calls_tbl
+values(1234, null, null, null)
+```
+
+Viewing data from table
+-----------------------
+```
+select * from demo_db.fire_service_calls_tbl
+```
+
+