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07 Join and Concatenate

Exercises for joining and concatenating data.

Join tables with different information for the same ID. Concatenate tables with the same information for different IDs.

Exercise: Concatenate1) Read the life expectancy data from two sources: an Excel sheet that contains the data for countries and adatabase table that contains the data for continents.2) Concatenate them into one table. Use union of columns. What happens to the Rank column that ismissing in the top table? Exercise: Join1) Read the population, life expectancy, geo coordinates, and travel advisories data by executing the readernodes below2) Join all tables based on the names of the countries. Use inner join. How many rows are there in the finaljoined table? Were any rows discarded during the joining operation?3) OPTIONAL: The names of the following countries are written differently in the travel advisories tablecompared to the other tables. The spelling in the other tables is shown in brackets:- The Gambia (Gambia)- Guinea Bissau (Guinea-Bissau)- The Bahamas (Bahamas)Edit the country names in the travel advisories table manually with the Table Editor node. Join the edited tablewith the other tables. How many rows are there in the joined table now? Demographics.sqliteLifeExpectancydemographics.xlsx(life_expectancy)demographics.xlsx(population)demographics.xlsx(life_expectancy)travel_advidories.csvgeo_coordinates.table SQLite Connector DB Table Selector DB Reader Excel Reader Excel Reader Excel Reader CSV Reader Table Reader Exercise: Concatenate1) Read the life expectancy data from two sources: an Excel sheet that contains the data for countries and adatabase table that contains the data for continents.2) Concatenate them into one table. Use union of columns. What happens to the Rank column that ismissing in the top table? Exercise: Join1) Read the population, life expectancy, geo coordinates, and travel advisories data by executing the readernodes below2) Join all tables based on the names of the countries. Use inner join. How many rows are there in the finaljoined table? Were any rows discarded during the joining operation?3) OPTIONAL: The names of the following countries are written differently in the travel advisories tablecompared to the other tables. The spelling in the other tables is shown in brackets:- The Gambia (Gambia)- Guinea Bissau (Guinea-Bissau)- The Bahamas (Bahamas)Edit the country names in the travel advisories table manually with the Table Editor node. Join the edited tablewith the other tables. How many rows are there in the joined table now? Demographics.sqliteLifeExpectancydemographics.xlsx(life_expectancy)demographics.xlsx(population)demographics.xlsx(life_expectancy)travel_advidories.csvgeo_coordinates.tableSQLite Connector DB Table Selector DB Reader Excel Reader Excel Reader Excel Reader CSV Reader Table Reader

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Created by: Maarit Laukkanen
Created at: 2020-04-20
On NodePit since: 2023-09-25
Last update: 2026-01-10
Created with KNIME version: v4.4.0
Tags: joinconcatenate

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