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07 Join and Concatenate

05 Join and Concatenate
Exercise: Joiner1) Read the adult.csv, adult_education.table, and adult_income.xlsx files by executing the reader nodes2) Join the adult.csv data with the adult_education.table data. Use the ID column as the joining column. Useinner join. 3) Join the adult_income.xlsx data with the joined table. Apply the same settings. 4) What is the number of rows and columns in the first joined table? And in the second? Were any rowsdiscarded in the joining operations? 32549 rows in all three tables. No rows discarded Exercise: Concatenate1) Execute the Table Reader nodes below. The adult_joined.table file contains the records for all countriesbut Scotland. The records for Scotland are stored in a separate adult_scotland.table file.2) Concatenate the two tables into one3) Which column is missing in one of the tables? If you want to include this column in your concatenatedtable, do you select union or intersection of columns? ID column is missing from adult_scotland and youwould need to use a union of columns in order to include this column Read dataadult_income.xlsxRead adult.csvRead adult_education.tableadult_joined.tableadult_scotland.tableNode 34Node 35Node 36 Excel Reader CSV Reader Table Reader Table Reader Table Reader Joiner Joiner Concatenate Exercise: Joiner1) Read the adult.csv, adult_education.table, and adult_income.xlsx files by executing the reader nodes2) Join the adult.csv data with the adult_education.table data. Use the ID column as the joining column. Useinner join. 3) Join the adult_income.xlsx data with the joined table. Apply the same settings. 4) What is the number of rows and columns in the first joined table? And in the second? Were any rowsdiscarded in the joining operations? 32549 rows in all three tables. No rows discarded Exercise: Concatenate1) Execute the Table Reader nodes below. The adult_joined.table file contains the records for all countriesbut Scotland. The records for Scotland are stored in a separate adult_scotland.table file.2) Concatenate the two tables into one3) Which column is missing in one of the tables? If you want to include this column in your concatenatedtable, do you select union or intersection of columns? ID column is missing from adult_scotland and youwould need to use a union of columns in order to include this column Read dataadult_income.xlsxRead adult.csvRead adult_education.tableadult_joined.tableadult_scotland.tableNode 34Node 35Node 36 Excel Reader CSV Reader Table Reader Table Reader Table Reader Joiner Joiner Concatenate

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Created by: Maarit Laukkanen
Created at: 2020-04-20
On NodePit since: 2022-02-26
Last update: 2024-11-21
Created with KNIME version: v4.5.1
Tags: joinconcatenate

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