The number of rows is determined by the data types and number of fields that are being rendered. Sampled: To enable you to interact directly with your data, Tableau Prep works with a subset of your raw data. When you hover over the number of fields and rows, you can see the exact number of rows (in this example, 2848).ĭata set size: Work with a subset of your data by specifying the number of rows to include in the Data Sample tab in the Inputpane. In the example below, there are 21 fields and 3000 rows in the data set. Tableau Prep rounds to the nearest thousand. Number of fields and rows: In the upper-left corner of the Profile pane you can find information that summarizes the number of fields and rows in the data at a particular point in the flow. You can use the Profile pane to see the current state and structure of your data and spot nulls and outliers. See size details about your dataĪfter you connect to your data, add a table to the flow, and then add a step. To see a list of cleaning options available in the different step types, see About cleaning operations. You can change the data type in your Input step after connecting to data from the following data sources:įor all other data sources, add a cleaning step or other step type to make this change. Like Tableau Desktop, if the change is not successful you will see Null values in the fields instead and you can create a calculation to make the change.įor more information about using DateParse, see Convert a Field to a Date Field (Link opens in a new window) in the Tableau Desktop and Web Authoring Help. You can change string or integer data types to Date or Date & Time, and Tableau Prep will trigger Auto DateParse to change these data types. To change a data type, click the data type icon and select the correct data type from the context menu. Because different databases can handle data in different ways, Tableau Prep's interpretation might not always be correct. Like Tableau Desktop, Tableau Prep interprets the data in your fields when you drag a connection to the Flow pane and automatically assigns a data type to it. Review the data types assigned to your data Use the options in this topic to get a good understanding about the composition of your data to better understand changes you need to make and the effect of the operations you include in the flow. For more information about authoring flows on the web, see Tableau Prep on the Web in the Tableau Server (Link opens in a new window) and Tableau Cloud (Link opens in a new window) help. The content in this topic applies to all platforms, unless specifically noted. Note: Starting in version 2020.4.1, you can now create and edit flows in Tableau Server and Tableau Cloud.
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