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04_​Data_​Transformation

Exercise 4: Table RestructuringIn this exercise you change data structure by unpivoting columns to rows. 1) Change the structure of the table with the onsite purchases so that each purchased product is in a separate row and notthe whole purchase event 1.1 Unpivot the columns that show the products ordered in one purchase event. Retain other columns in the table. 1.2 Remove rows that have missing values for the unpivoted column values 1.3 Rename "ColumnValues" column to "ProductNr" and "ShoppingNumber" to "OrderNumber" 1.4 Remove unnecessary columns "BasketSize" and "ColumnNames" 2) (optional) Format the product numbers 1.1 Split the product numbers into substrings where separated by "-" 1.2 Separate the rows where the middle part of the product number is less than 100 1.3 Separate the rows where the middle part of the product number is less than 10 1.4 Add one zero to the middle parts that are between 10 and 99 1.5 Add two zeros to the middle parts that are smaller than 10 1.6 Concatenate the tables separated and manipulated in steps 1.2-1.5 1.7 Combine the manipulated substrings back to one string, and replace the product numbers by these manipulated values Top: Online purchasesBottom: Product prizes Read onsitetransactions data Read cleanedcustomer information Read data ononline purchases Exercise 4: Table RestructuringIn this exercise you change data structure by unpivoting columns to rows. 1) Change the structure of the table with the onsite purchases so that each purchased product is in a separate row and notthe whole purchase event 1.1 Unpivot the columns that show the products ordered in one purchase event. Retain other columns in the table. 1.2 Remove rows that have missing values for the unpivoted column values 1.3 Rename "ColumnValues" column to "ProductNr" and "ShoppingNumber" to "OrderNumber" 1.4 Remove unnecessary columns "BasketSize" and "ColumnNames" 2) (optional) Format the product numbers 1.1 Split the product numbers into substrings where separated by "-" 1.2 Separate the rows where the middle part of the product number is less than 100 1.3 Separate the rows where the middle part of the product number is less than 10 1.4 Add one zero to the middle parts that are between 10 and 99 1.5 Add two zeros to the middle parts that are smaller than 10 1.6 Concatenate the tables separated and manipulated in steps 1.2-1.5 1.7 Combine the manipulated substrings back to one string, and replace the product numbers by these manipulated values Top: Online purchasesBottom: Product prizes Read onsitetransactions data Read cleanedcustomer information Read data ononline purchases

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Created by: Maarit Laukkanen
Created at: 2019-10-18
On NodePit since: 2019-12-07
Last update: 2024-04-23
Created with KNIME version: v4.0.2

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