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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 is missing in the top table: Those values are shown as missing forthe rows from 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 final joined table: 174Were 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: 177Hint! You can drag and drop the files from KNIME Explorer to the workflow editor Demographics.sqliteLifeExpectancytravel_advidories.csvgeo_coordinates.tabledemographics.xlsx(life_expectancy)demographics.xlsx(population)demographics.xlsx(life_expectancy)Left JoinLeft JoinLeft JoinCorrectionsNode 32 SQLite Connector DB Table Selector File Reader Table Reader DB Reader Excel Reader Excel Reader Excel 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 is missing in the top table: Those values are shown as missing forthe rows from 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 final joined table: 174Were 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: 177Hint! You can drag and drop the files from KNIME Explorer to the workflow editor Demographics.sqliteLifeExpectancytravel_advidories.csvgeo_coordinates.tabledemographics.xlsx(life_expectancy)demographics.xlsx(population)demographics.xlsx(life_expectancy)Left JoinLeft JoinLeft JoinCorrectionsNode 32SQLite Connector DB Table Selector File Reader Table Reader DB Reader Excel Reader Excel Reader Excel Reader Joiner Joiner Joiner Table Editor Concatenate

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Created by: Maarit Laukkanen
Created at: 2020-04-20
On NodePit since: 2021-06-02
Last update: 2024-11-18
Created with KNIME version: v4.3.2
Tags: joinconcatenate

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