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- How to practice DAX functions please help me with examples and sample dataIn Tech Talk·July 30, 2023Practicing DAX (Data Analysis Expressions) functions is essential for mastering Power BI and Excel data modeling. DAX is a formula language that allows you to create custom calculations and aggregations in your data models. Below are some common DAX functions along with examples and sample data to help you get started: Sample Data: Let's consider a simple sales table with the following columns: Date: The date of the sales transaction. Product: The name of the product sold. Quantity: The quantity of the product sold in each transaction. Price: The price of each product sold. Examples of DAX Functions: SUM: Calculates the sum of a numeric expression over a table. Total Sales = SUM(Sales[Quantity] * Sales[Price]) This DAX formula calculates the total sales amount by multiplying the Quantity and Price columns for each row and then summing the results. AVERAGE: Calculates the average of a numeric expression over a table. Average Price = AVERAGE(Sales[Price]) This DAX formula calculates the average price of all products sold. COUNTROWS: Counts the number of rows in a table or table expression. Total Transactions = COUNTROWS(Sales) This DAX formula calculates the total number of transactions in the sales table. FILTER: Filters a table based on a specified condition. Filtered Sales = FILTER(Sales, Sales[Price] > 10) This DAX formula creates a new table that includes only the rows where the price is greater than 10. RELATED: Returns a related value from another table based on a specified relationship. Product Category = RELATED(Products[Category]) This DAX formula returns the product category for each row in the sales table, based on the relationship between the Sales and Products tables. CALCULATE: Evaluates an expression in a modified filter context. Discounted Sales = CALCULATE(SUM(Sales[Quantity] * Sales[Price]), Sales[Price] > 10) This DAX formula calculates the total sales amount for transactions where the price is greater than 10. These examples demonstrate some basic DAX functions and how they can be applied to the sample data. As you practice and gain familiarity with DAX, you can explore more advanced functions and combinations to perform complex calculations and analysis in your data models. Happy DAX-ing! 📈💡004
- EY Live Power Bi Developer Interview Q & AIn Tech Talk·August 12, 2023Interviewer (I): Uh, yeah. Uh, can you quickly walk me through your profile? Candidate (C): Yeah, sure. Thanks for this opportunity. My name is Dinesh. I have a total of four years of experience in IT. Most of my relevant experience comes from working with Power BI, which is almost three years. Currently, I'm employed at Fidelity. This is my current company. I've been involved in many end-to-end reporting projects. As for my skills, I'm proficient in SQL and visualization tools such as Power BI. Much of my experience involves building comprehensive reports. Right now, I'm working with a client named Sigma, a US-based insurance company. This client requires us to gather and analyze insurance data from on-premises databases for reporting purposes. INTERVIEWER: Great. Can you tell me about the sources you've connected for the current project? CANDIDATE: Certainly. For the current project at Sigma, we're connected to a Microsoft SQL database using the import mode. Although I have experience with various data sources like CSV, Excel, JSON, and XML files, for this project, we're specifically using a SQL Server. INTERVIEWER: Could you explain the difference between import mode and direct query mode? CANDIDATE: Import mode and direct query mode are both ways to access data. In import mode, Power BI brings the data into its environment, allowing for comprehensive modeling, including creating schemas, implementing functions, and more. However, there's a storage limitation. Direct query mode, on the other hand, accesses data from the source tables via queries. It's beneficial when dealing with unlimited data sizes. Import mode lets you build complex models, while direct query mode allows for working with vast datasets directly from the source. INTERVIEWER: How would you rate your proficiency in SQL and Power BI? CANDIDATE: In terms of SQL, I'd rate myself at around 3.5 out of 5. As for Power BI, I'd give myself a 4 out of 5. SQL was my starting point, and I've honed my skills with it. With Power BI, I've gained significant experience over time. INTERVIEWER: Can you share your role and responsibilities across the projects you've worked on as a Power BI developer? CANDIDATE: Certainly. In my current project, I'm the sole Power BI developer. I've been involved in the entire lifecycle, starting from gathering requirements. Our client provided requirements without direct data, so I had to analyze the database, identify relevant tables, and create schema structures. I've also performed various data transformations, including text, column, and data transformations. I'm well-versed in choosing the appropriate visualization charts for different data. Additionally, I've been responsible for publishing the reports and setting up schedules for automated updates. INTERVIEWER: Have you worked with any custom charts beyond the default ones? CANDIDATE: Yes, I have. While custom charts are typically obtained through premium access or organizational accounts, I've used charts like infographic charts, scroller charts for categorical data, word clouds, and drill-down column charts. We follow guidelines to ensure the charts we use are approved and reliable for our reports. INTERVIEWER: How about Sankey charts or ribbon charts? Are you familiar with those? CANDIDATE: Certainly. Sankey charts are useful for visualizing relationships between categorical variables. Ribbon charts, on the other hand, are an extended version of stacked column charts. They allow you to visualize the change and growth between different levels, making them great for year-over-year comparisons or percentage growth analyses. INTERVIEWER: Have you utilized conditional formatting in your reports? CANDIDATE: Yes, I've implemented conditional formatting, especially when accuracy down to the decimal point is crucial. We use it in metrics and tables to make the data more informative and visually appealing. INTERVIEWER: You mentioned working with DAX functions. Can you provide an example of a scenario where you used DAX functions? CANDIDATE: Certainly. Let's say we have a sales scenario, and we want to compare this year's sales with the sales of the previous year for the same time frame, say from November to December. In this case, I'd use the SAMEPERIODLASTYEAR function. It's a versatile way to achieve year-over-year comparisons without having to manually adjust time frames. INTERVIEWER: Have you also worked with DAX functions beyond this example? CANDIDATE: Absolutely. I've worked with various DAX functions. For instance, I've used SUMX for calculating totals even when the original column isn't present. It's a powerful way to achieve calculations without altering the original dataset. I've also used RANKX, ALL, ALLSELECTED, and ALLEXCEPT functions, depending on the requirements and context of the reports. INTERVIEWER: You mentioned working with Power Query Editor for data transformations. Can you share some of the transformations you've performed? CANDIDATE: Certainly. I've worked with text transformations, number transformations, column transformations, and merging queries. I've also built schema structures like star schemas and snowflake schemas to organize the data efficiently. Power Query Editor has been instrumental in transforming raw data into meaningful insights. INTERVIEWER: Have you faced any challenges during your projects? CANDIDATE: Yes, there were a few challenges. One significant challenge was data gathering. Clients often provide requirements without direct data sources, which means I had to explore and identify relevant tables. Additionally, implementing complex calculations and DAX functions sometimes required intensive effort. In another project, data performance tuning was crucial, where we aimed to optimize report performance through efficient Power Query transformations. INTERVIEWER: Could you provide an example of a complex report you've built and any positive feedback you received? CANDIDATE: Certainly. In a previous project for a telecommunication vendor, we built a dynamic report with innovative features. One instance was using infographic charts to represent different telecom services visually. The client appreciated the creativity and out-of-the-box thinking, and the report was well-received. INTERVIEWER: What type of access did you hold in your projects, and what were your roles? CANDIDATE: In my current project, I held contributor access since I was the primary Power BI developer. I had the responsibility of creating reports, performing data transformations, and publishing them. I've seen different roles in other projects, where teams had multiple members with varying levels of access. INTERVIEWER: Have you implemented row-level security in your reports? CANDIDATE: Yes, we've implemented row-level security to restrict data access based on user roles. This ensures that each user sees only the relevant data, enhancing data security. INTERVIEWER: How do you keep yourself updated with Power BI's frequent updates? CANDIDATE: I stay updated by regularly checking Microsoft's official documentation, where they summarize new features and updates each month. I also engage in hands-on Proof of Concept (POC) projects to test new features before incorporating them into live projects. For instance, I recently explored small multiples for improved data visualization. INTERVIEWER: Thank you for sharing your experiences and insights. Do you have any questions for me? CANDIDATE: Yes, thank you for the discussion. I'd like to know more about the specific role you're looking to fill and the challenges the team is currently facing. INTERVIEWER: Certainly. We're seeking a Power BI developer with end-to-end experience, similar to what you've described. The role involves working across all phases of the reporting lifecycle, from data gathering to sharing insights with stakeholders. It seems like your experience aligns well with our requirements. CANDIDATE: Thank you for the information. It's been a great conversation and I appreciate the opportunity to discuss my background and skills. INTERVIEWER: Likewise, thank you for your time. We'll be in touch soon regarding the next steps in the interview process. CANDIDATE: Sounds good. Looking forward to it. Thank you again. INTERVIEWER: You're welcome. Have a great day. CANDIDATE: You too. Goodbye0049
- Any one have dax pattern collection notes ?In Ask Questions·October 16, 2023Any one have dax pattern collection notes?001
- If you want to update the existing item in the SharePoint list instead of creating a new one when you send the same data from the Power BIIn Ask Questions·October 20, 2023If you want to update the existing item in the SharePoint list instead of creating a new one when you send the same data from the Power BI report. This is certainly possible with Microsoft Flow. Here are the steps you can follow to update the existing item in SharePoint list: 1. Create a Flow with a Trigger: • Start by creating a new flow or editing your existing flow. • Set up the trigger as per your requirement (either automated or instant with a button). 4. Get Data from Power BI Report: • Add a new step and choose "Power BI." • Use the "Get rows" action to retrieve data from your filtered Power BI report. • Configure the "Get rows" action by specifying the workspace, dataset, and table. 8. Check if Item Exists in SharePoint List: • Add a new step and choose "SharePoint." • Use the "Get items" action to retrieve items from your SharePoint list. • Use a filter query to check if the item you want to update already exists in the list. 12. Update or Create Item in SharePoint List: • Add a condition to check if the item exists in the SharePoint list. • If the item exists, use the "Update item" action to update the existing item in the list. • If the item does not exist, use the "Create item" action to create a new item in the list. 16. Save and Test Your Flow: • Save your flow and test it by triggering it manually or waiting for the automated trigger to occur.003
- science-related general knowledge questions along with their answersIn Questions & Answers·August 18, 2023Question: What is the chemical symbol for the element oxygen? Answer: O Question: What is the process by which plants convert light energy into chemical energy to produce food? Answer: Photosynthesis Question: What is the smallest unit of matter? Answer: Atom Question: What is the force that opposes the motion of objects through a fluid (liquid or gas)? Answer: Friction Question: What is the process by which water vapor turns into liquid water? Answer: Condensation Question: Which gas is most abundant in Earth's atmosphere? Answer: Nitrogen Question: What is the study of the Earth's physical structure, processes, and history? Answer: Geology Question: What is the process by which a solid changes directly into a gas without passing through the liquid state? Answer: Sublimation Question: What is the SI unit of electric current? Answer: Ampere (A) Question: What is the study of celestial bodies such as stars, planets, galaxies, and black holes? Answer: Astronomy Question: What is the process by which an organism produces offspring that are genetically identical to itself? Answer: Asexual reproduction Question: What is the process by which an electric current passes through a liquid, causing chemical reactions and the separation of materials? Answer: Electrolysis Question: What is the force that attracts any two masses toward each other? Answer: Gravity Question: What is the unit of measure for frequency? Answer: Hertz (Hz) Question: What is the chemical process that releases energy from food in the presence of oxygen? Answer: Cellular respiration Question: What is the outermost layer of the Earth called? Answer: Crust Question: What is the process by which a liquid changes into a gas at temperatures below its boiling point? Answer: Evaporation Question: What is the unit of measure for sound intensity? Answer: Decibel (dB) Question: What is the study of the Earth's atmosphere, weather, and climate? Answer: Meteorology Question: What is the part of a cell that controls its activities and contains genetic information? Answer: Nucleus Question: What is the process by which a gas changes into a liquid? Answer: Condensation Question: What is the force that opposes the motion of one surface past another? Answer: Friction Question: What is the unit of measure for electric resistance? Answer: Ohm Question: What is the process by which plants release water vapor into the atmosphere? Answer: Transpiration Question: What is the study of living organisms and their interactions with each other and their environment? Answer: Ecology Question: What is the phenomenon where light bends when passing from one medium to another at an angle? Answer: Refraction Question: What is the SI unit of energy? Answer: Joule Question: What is the densest planet in our solar system? Answer: Earth Question: What is the smallest bone in the human body? Answer: Stapes (in the middle ear) Question: What is the process by which a gas changes directly into a solid without passing through the liquid state? Answer: Deposition009
- Hi everyone I am facing issue in RDL Report. For subreport we are using Toggle button for expand and collapse the data.In Ask Questions·September 30, 2023Hi everyone I am facing issue in RDL Report. For subreport we are using Toggle button for expand and collapse the data. But we are facing time out error. For 2000 records it is taking 2:55 seconds. When we run the profiler we got to know that subreport is facing the issue because it is checking 2000 times the parameter filters... can anyone give the solution how we can handle the situation.001
- I need assignment questions of 4th semester Of BCA.. please provide meIn Ask Questions·September 29, 2023Below are some assignment questions for a hypothetical 4th semester BCA (Bachelor of Computer Applications) curriculum. Do note that the actual curriculum might differ based on the university or institution, but these questions are designed to be broad and applicable to typical 4th semester topics: 1. Computer Networks: a. Explain the OSI model and the functionalities of each layer. b. Compare and contrast TCP and UDP protocols. c. What are the various types of network topologies? Describe each with suitable diagrams. d. Discuss the importance of IP addressing and Subnetting. Give examples. 2. Database Management System: a. Differentiate between DBMS and RDBMS. Give examples of popular software for each. b. Design an ER diagram for a library management system. c. Explain normalization. Demonstrate 1NF, 2NF, and 3NF using examples. d. Write SQL queries to perform CRUD operations on the database of your choice. 3. Object-Oriented Programming using Java: a. Describe the OOPs concepts with suitable examples in Java. b. Develop a Java program to implement polymorphism and inheritance. c. What is exception handling? Write a Java program to demonstrate the use of custom exceptions. d. Explain the significance of Java's collection framework. Provide examples. 4. Software Engineering: a. What are the various phases of the Software Development Life Cycle (SDLC)? Describe each phase. b. Compare and contrast the waterfall and agile methodologies of software development. c. Discuss the importance of software testing. Describe the various types of testing methods. d. Case study: Analyze any popular software. Discuss its features, development methodology used, and user feedback. 5. Web Technology: a. Design and develop a static website for an online book store using HTML and CSS. b. Discuss the importance and usage of JavaScript in web development. c. Explain the role of web servers and browsers in web technology. Give examples. d. What is responsive web design? Why is it important in the current digital scenario? 6. Operating Systems: a. Compare and contrast preemptive and non-preemptive scheduling algorithms. b. Discuss the concept of paging and segmentation in memory management. c. What is deadlock? Explain the necessary conditions for a deadlock to occur and methods to handle it. d. Compare the features and advantages of UNIX, LINUX, and WINDOWS operating systems.003
- The Rise of Wearable Tech ⌚In Tech Talk·July 19, 2023From smartwatches to fitness trackers, wearable devices have become an integral part of our lives. What exciting possibilities do you see in wearable tech? Let's discuss its impact on health, fitness, and data tracking.001
- Augmented Reality (AR) and Virtual Reality (VR) 🕶️In Tech Talk·July 19, 2023AR and VR technologies are blurring the lines between the real and virtual worlds. Share your favorite applications of AR and VR, whether in gaming, education, or professional settings001
- Sustainable Tech Innovations ♻️In Tech Talk·July 19, 2023Tech advancements aren't just about convenience; they also play a crucial role in environmental sustainability. Let's celebrate eco-friendly innovations, from renewable energy solutions to eco-conscious gadgets.001
- Quantum Computing and Cryptography 🔒In Tech Talk·July 19, 2023Quantum computing holds the promise of supercomputing power, disrupting traditional cryptography and cybersecurity. Let's explore the potential and challenges of this groundbreaking technology.001
- Biometric Security and Privacy Concerns 🔐In Tech Talk·July 19, 2023Biometric authentication is gaining popularity, but it raises questions about privacy and data security. Engage in a thoughtful discussion on balancing convenience and safeguarding personal information.001
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