Microsoft Excel: Combining Tables with Power Query Editor
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Questions and Answers

What is the purpose of importing from Excel in Power Query Editor?

  • To remove duplicates
  • To load data into Powerbi initially (correct)
  • To append tables
  • To transform data types

    • What is the format of the data in the Logged column?

  • 2018-12-31 at 08:59 (correct)
  • DD-MM-YYYY HH:MM
  • YYYY-MM-DD HH:MM
  • MM-DD-YYYY HH:MM

    • What is the purpose of appending tables in Power Query Editor?

  • To remove duplicates
  • To combine tables (correct)
  • To transform data types
  • To load data into Powerbi

    • What is the purpose of removing duplicates in Power Query Editor?

    <p>To get a table with unique values</p> Signup and view all the answers

    How can you analyze the complaints by the logged date and use a built-in date hierarchy?

    <p>By splitting the Logged column by using 'at' as the delimiter</p> Signup and view all the answers

    What happens when you split the Logged column by using 'at' as the delimiter?

    <p>The date and time are separated into separate columns</p> Signup and view all the answers

    Why is it necessary to import data from Excel in Power Query Editor?

    <p>Because the data has not been loaded to Powerbi initially</p> Signup and view all the answers

    What is the purpose of Power Query Editor?

    <p>To combine and transform data from multiple sources</p> Signup and view all the answers

    What is the purpose of dropping the Subject and Body from the email report?

    <p>To prevent report recipients from reading the analyzed emails</p> Signup and view all the answers

    What should you configure in the table to make it available as an organizational data type in Microsoft Excel?

    <p>Row label: Name</p> Signup and view all the answers

    What is the purpose of the Key column field in the Power BI table?

    <p>To provide a unique ID for the row</p> Signup and view all the answers

    Where can users find data from featured tables in Power BI datasets in Excel?

    <p>In the Data Types Gallery</p> Signup and view all the answers

    What is the purpose of using row-level security (RLS) in the Power BI model?

    <p>To restrict managers to seeing only their respective country data</p> Signup and view all the answers

    How many RLS roles should be created to meet the requirements?

    <p>A single role that filters Country[Manager_Email]</p> Signup and view all the answers

    What is the benefit of using the USERNAME DAX function in the RLS role?

    <p>To filter the data by manager email</p> Signup and view all the answers

    What is the main goal of the RLS implementation in this scenario?

    <p>To restrict managers to seeing only their respective country data</p> Signup and view all the answers

    What is the primary purpose of Column Distribution in Power BI?

    <p>To get a sense of the overall distribution of values within a column</p> Signup and view all the answers

    What is the difference between distinct values and unique values in Column Distribution?

    <p>Distinct values are the total number of values, unique values are the total number of values that only appear once</p> Signup and view all the answers

    What is the purpose of merging queries in Power BI?

    <p>To add one or more columns to another query</p> Signup and view all the answers

    When should you append queries in Power BI?

    <p>When you have additional rows of data to add to an existing query</p> Signup and view all the answers

    What should you do on the Categories query to create a Power BI dataset with a single table named Product?

    <p>Merge the Categories query with the Products query</p> Signup and view all the answers

    What is the benefit of breaking down data transformations into multiple queries in Power BI?

    <p>It makes sense in many situations, such as merging queries</p> Signup and view all the answers

    Why should you disable the query load in Power BI?

    <p>To manage the loading of queries</p> Signup and view all the answers

    What is the result of merging two queries in Power BI?

    <p>A new query with additional columns</p> Signup and view all the answers

    What is the purpose of configuring an on-premises data gateway in Power BI?

    <p>To enable data refresh from an on-premises Microsoft SQL Server database</p> Signup and view all the answers

    What is the final step in ensuring that the Power BI service can connect to an on-premises Microsoft SQL Server database and refresh the dataset?

    <p>Configure a scheduled refresh</p> Signup and view all the answers

    What type of connector should you choose to connect to a Cassandra database in Power BI Desktop?

    <p>ODBC</p> Signup and view all the answers

    What is the benefit of using the ODBC connector in Power BI Desktop?

    <p>It connects to data sources not listed in the Get Data connectors</p> Signup and view all the answers

    What is the purpose of adding a data source in Power BI?

    <p>To connect to an on-premises data source</p> Signup and view all the answers

    What is the first step in ensuring that the Power BI service can connect to an on-premises Microsoft SQL Server database and refresh the dataset?

    <p>Configure an on-premises data gateway</p> Signup and view all the answers

    What is the purpose of adding the dataset owner to the data source in Power BI?

    <p>To enable the Power BI service to access the data source</p> Signup and view all the answers

    What is the result of not configuring an on-premises data gateway in Power BI?

    <p>The Power BI service cannot connect to the on-premises data source</p> Signup and view all the answers

    What is the main purpose of importing data in Power BI?

    <p>To create visuals and reports based on the imported data</p> Signup and view all the answers

    What is the advantage of using Direct Query for the dataset?

    <p>It ensures that your dataset is always up-to-date and reflects changes made to the source data</p> Signup and view all the answers

    How do you combine two tables with a common column in Power Query Editor?

    <p>Merge queries</p> Signup and view all the answers

    What happens when you use Direct Query for the dataset?

    <p>The data is retrieved and queried from the original data source in real-time</p> Signup and view all the answers

    What should you do to analyze the complaints by the logged date and use a built-in date hierarchy?

    <p>Apply a transformation to extract the last 11 characters of the Logged column and set the data type of the new column to Date</p> Signup and view all the answers

    What is the purpose of using Power Query to import data?

    <p>To create visuals and reports based on the imported data</p> Signup and view all the answers

    What is the result of using Merge queries in Power Query Editor?

    <p>Combining columns of two tables</p> Signup and view all the answers

    What is the format of the data in the Logged column?

    <p>YYYY-MM-DD at HH:MM</p> Signup and view all the answers

    Study Notes

    Power BI Query Editor

    • Importing from Excel requires the data to be loaded to Power BI initially.
    • To combine products from two tables into one table with no duplicate values, perform the following actions in sequence:
      • Import From Excel
      • Append Table 2 to Table 1
      • Remove Duplicates from the appended table

    Date and Time Analysis

    • To analyze complaints by logged date and use a built-in date hierarchy, split the Logged column by using "at" as the delimiter.
    • This allows separation of the date and time into separate columns.

    Combining Queries

    • There are two primary ways of combining queries: merging and appending.
    • Merging is used when you have one or more columns that you'd like to add to another query.
    • Appending is used when you have additional rows of data that you'd like to add to an existing query.
    • To create a Power BI dataset that contains a single table named Product, merge the queries and disable the query load.

    Data Refresh

    • To ensure that the Power BI service can connect to an on-premises Microsoft SQL Server database and refresh the dataset, perform the following actions in sequence:
      • Configure an on-premises data gateway.
      • Add a data source.
      • Add the dataset owner to the data source.
      • Configure a scheduled refresh.

    Data Connectors

    • If there is no specific connector for a Cassandra database, use an ODBC connector.
    • ODBC allows you to connect to data sources that aren't identified in the Get Data lists.
    • You can specify a Data Source Name (DSN) or a connection string to connect to the ODBC driver.

    Table Relationships

    • To combine tables into a single query that contains the unique columns of each table, select Merge queries in Power Query Editor.
    • Merge combines columns, while Append combines rows.

    Organizational Data Types

    • To make a table available as an organizational data type in Microsoft Excel, configure the properties of the table as follows:
      • Set the row label to Name.
      • Set the key column to ID.
      • Set the organizational data type to Yes.

    Row-Level Security (RLS)

    • To meet the requirements of row-level security (RLS), perform the following actions:
      • Create a single role that filters Country[Manager_Email] by using the USERNAME DAX function.
      • (Additional action not specified)

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    Related Documents

    pl-300_june download.pdf

    Description

    Learn how to combine tables in Microsoft Excel using Power Query Editor. This quiz will test your skills in merging data from two tables into one without duplicates.

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