Data Analytics

Let’s now cover a hands-on and frequently used part of SQL: ⚙️ Data Manipulation (INSERT, UPDATE, DELETE) Data Manipulation Language (DML) commands are used to add, modify, or remove data from your tables. 1. INSERT – Add new records to a table. INSERT…

9 tips to master Power BI for Data Analysis: 📥 Learn to import data from various sources 🧹 Clean and transform data using Power Query 🧠 Understand relationships between tables using the data model 🧾 Write DAX formulas for calculated columns and measures 📊 Create interactive visuals: bar charts, slicers, maps, etc. 🎯 Use filters, slicers, and drill-through for deeper insights 📈 Build dashboards that tell a clear data story 🔄 Refresh and schedule your reports automatically 📚 Explore Power BI community and documentation for new tricks Power BI Free Resources: https://t.me/PowerBI_analyst Hope it helps :) #powerbi

🔄 Window Functions (ROW_NUMBER, RANK, PARTITION BY) Window functions perform calculations across rows related to the current row — but unlike GROUP BY, they don’t collapse your data! They are super useful for running totals, rankings, and finding duplicates.…

Here comes one of the cleanest and most powerful features in SQL: 🧠 Common Table Expressions (CTEs) A CTE (Common Table Expression) is a temporary result set that you can reference within a SELECT, INSERT, UPDATE, or DELETE statement. It makes your queries…

Now, let’s dive into a couple of powerful but often overlooked SQL features: 🧾 Views & Indexes (Basics) 1. Views A View is a virtual table based on a SQL query. It doesn’t store data itself — it just stores the query logic. Why use Views? - Simplifies…

🏷 Aliases & CASE Statements 1. Aliases (AS keyword) Aliases let you rename columns or tables temporarily to make your output cleaner or more readable. Column Alias Example: SELECT first_name AS name, salary AS monthly_income FROM employees; You’ll see…

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