Basics Flashcards
What are the 4 methods to connect to Data when creating a workbook?
- Connect to data on the site.
- Upload a file.
- Connect to on-premises and Cloud data sources.
- Use Dashboard Starters.
What is the Sheets column in the left pane of the interface?
Shows all the worksheets and the named ranges that are part of your spreadsheet.
Canvas
Located top right. When connected to most relational and file-based data, you can drag one or more tables to the canvas area to set up your Tableau data source.
Data Grid
Located below the canvas. Shows the first 1000 rows (default) of data from the tables in your canvas.
Does Tableau automatically identify the data types in each columns of your tables?
Yes. Tableau identifies data types AND geographic roles.
Relationships
Relationships define how tables relate to one another.
Relationships dynamically adjust the SQL join type applied between tables, based on the fields used in your visualizations.
Logical vs Physical Layer
Logical layer is the default view in the Data Source page. This view shows the logical relationships between your data tables. Logical tables remain distinct (normalized), not merged in data source.
Double-click a logical table to see its physical tables. You can combine data between tables at the physical layer using joins and unions. Each logical table contains at least one physical table in this layer. Physical tables are merged into a single , flat table that defines the logical table.
Noodle
Represents the relationship between the tables. Hover over to see summary of relationship. Double-click to edit relationship.
Workspace Area
Data pane: Displays all the fields from data source. Fields are grouped by data source tables.
Shelves + Cards: Drag fields here to build each viz.
View: Viz will display here.
Dimensions vs Measures + what’s their relationship?
Dimensions are fields that contain qualitative and quantitative descriptive values (eg names, dates, geographic data). ID fields are also dimensions.
Measures are fields that contain numeric quantitative values that can be aggregated using functions such as sum or average.
** Dimensions control the level of aggregation of the measures in a visualization **
Hierarchy
A logical arrangement of relevant unique attributes in a data set. This allows the data to have different levels of detail and helps us organize it.
Visualizations
Drag fields from the data pane to the shelves and cards to build each visualizations. Data viz will display in the view. Build one viz per sheet. Combine sheets to create dashboards and stories.
Calculated Fields
Allow you to create new data from data that already exists in your data source. Calculated fields essentially let you create a new field in your data source, where the values or members are determined by a calculation that you control. Can be a dimension OR a measure depending on fields/formulas you use. Calculated fields will appear in data pane and will have = next to them.
Click drop-down menu in data pane to create or go to Analysis > Create calculated field.
Show Me
Useful way to create a view. Shows you a list of common visualization types as well as the recommended one (outlined in orange).
Marks Card
Provides control over how the data is displayed in the view. Also lets you add context and details. Eg format numbers, change colors, size of chart elements, etc.