Leo C questions

Leo C answers

• Use Spark Scala to transform flat data into nested object
• Calculate average using Spark Scala
• Rename nested struct columns in a Spark DataFrame [duplicate]
• Update Spark Dataframe's window function row_number column for Delta Data
• Postgresql : can't connect with new created users
• Spark - How to calculate percentiles in Spark?
• How to compare a string with another where the one has space in between
• Add column names to data read from csv file without column names
• How to split multi-value column into separate rows using typed Dataset?
• Type bound error when creating a tuple in scala