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07 Join and Concatenate

07 Join and Concatenate
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? unknowns (?) are filled in for missing rank values 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? 174 rows. Were any rows discarded during the joining operation? Yes3) 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? 177 rows Demographics.sqliteLifeExpectancydemographics.xlsx(life_expectancy)demographics.xlsx(population)demographics.xlsx(life_expectancy)travel_advidories.csvgeo_coordinates.tableinner join on country nameinner join on country nameinner join on country namemanual manipulationconcatenate lifeexpectancy tables SQLite Connector DB Table Selector DB Reader Excel Reader Excel Reader Excel Reader CSV Reader Table Reader Joiner Joiner Joiner Table Editor Concatenate 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? unknowns (?) are filled in for missing rank values 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? 174 rows. Were any rows discarded during the joining operation? Yes3) 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? 177 rows Demographics.sqliteLifeExpectancydemographics.xlsx(life_expectancy)demographics.xlsx(population)demographics.xlsx(life_expectancy)travel_advidories.csvgeo_coordinates.tableinner join on country nameinner join on country nameinner join on country namemanual manipulationconcatenate lifeexpectancy tablesSQLite Connector DB Table Selector DB Reader Excel Reader Excel Reader Excel Reader CSV Reader Table Reader Joiner Joiner Joiner Table Editor Concatenate

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Created by: Maarit Laukkanen
Created at: 2020-04-20
On NodePit since: 2022-01-22
Last update: 2024-11-18
Created with KNIME version: v4.5.0
Tags: joinconcatenate

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