Technical Interview Questions
A heat map is used for comparing categories with color and size. With heat maps, you can compare two different measures together. A treemap is a powerful visualization that does the same as that of the heat map. Apart from that, it is also used for illustrating hierarchical data and part-to-whole relationships. Both heat maps … Read more
According to your question, you must have a country, state, profit and sales fields in your dataset. Double-click on the country field. Drag the state and drop it into Marks card. Drag the sales and drop it into size. Drag profit and drop it into color. Click on size legend and increase the size. Right-click … Read more
To view the underlying SQL Queries in Tableau, we mainly have two options: Use the Performance Recording Feature: You have to create a Performance Recording to record the information about the main events you interact with the workbook. Users can view the performance metrics in a workbook created by Tableau. Help -> Settings and Performance … Read more
The Joining term is used when you are combining data from the same source, for example, worksheet in an Excel file or tables in an Oracle database. While blending requires two completely defined data sources in your report. In Tableau, joining and blending are both methods used to combine data from multiple sources, but they … Read more
NVL(exp1, exp2) and NVL2(exp1, exp2, exp3) are functions which check whether the value of exp1 is null or not. If we use NVL(exp1,exp2) function, then if exp1 is not null, then the value of exp1 will be returned; else the value of exp2 will be returned. But, exp2 must be of the same data type … Read more