Frequently Asked Questions about the SQL and Power BI Program

Question 1

What does the SQL and Power BI Program cover?

Accepted Answer

The program covers relational databases, SQL queries, filtering, aggregation, joins, subqueries, common table expressions, window functions, Power Query, data modelling, DAX, dashboards, reporting, publishing, and business intelligence.

Question 2

Who should take this SQL and Power BI program?

Accepted Answer

The program is suitable for students, data analysts, business analysts, database learners, finance professionals, marketing analysts, operations professionals, managers, researchers, consultants, entrepreneurs, and reporting specialists.

Question 3

What is SQL?

Accepted Answer

SQL, or Structured Query Language, is used to store, retrieve, filter, combine, update, and analyse data in relational database systems.

Question 4

What is Power BI?

Accepted Answer

Power BI is a business-intelligence and data-visualization platform used to connect data, transform information, build models, create dashboards, and share analytical reports.

Question 5

How do SQL and Power BI work together?

Accepted Answer

SQL retrieves and prepares data from databases, while Power BI models, analyses, visualizes, and presents that data through interactive reports and dashboards.

Question 6

What SQL skills are included in the program?

Accepted Answer

The program includes SELECT statements, filtering, sorting, grouping, aggregate functions, joins, subqueries, set operations, common table expressions, window functions, and advanced query techniques.

Question 7

What is a SQL JOIN?

Accepted Answer

A SQL JOIN combines related rows from two or more tables using matching columns or defined relationships.

Question 8

What is the difference between INNER JOIN and LEFT JOIN?

Accepted Answer

An INNER JOIN returns only matching rows from both tables, while a LEFT JOIN returns every row from the left table and matching rows from the right table.

Question 9

What is a SQL subquery?

Accepted Answer

A subquery is a query placed inside another SQL statement and is used to filter, compare, calculate, or provide intermediate results.

Question 10

What is a common table expression?

Accepted Answer

A common table expression is a temporary named result set that can make complex SQL queries easier to organize, read, and maintain.

Question 11

What are SQL window functions?

Accepted Answer

Window functions perform calculations across related rows without grouping them into a single result, supporting ranking, running totals, moving averages, and comparisons.

Question 12

What is Power Query?

Accepted Answer

Power Query is the data-connection and transformation component in Power BI used to import, clean, reshape, merge, and prepare data.

Question 13

What is data modelling in Power BI?

Accepted Answer

Data modelling organizes tables, relationships, measures, dimensions, and calculations so that reports produce accurate and efficient analytical results.

Question 14

What is DAX in Power BI?

Accepted Answer

DAX, or Data Analysis Expressions, is the formula language used in Power BI to create measures, calculated columns, calculated tables, and analytical calculations.

Question 15

What is the difference between a measure and a calculated column?

Accepted Answer

A calculated column is computed for each row and stored in the model, while a measure is calculated dynamically according to the report's current filter context.

Question 16

What is time intelligence in DAX?

Accepted Answer

Time intelligence uses dates and periods to calculate year-to-date values, prior-period comparisons, growth rates, rolling totals, and other time-based metrics.

Question 17

What is an interactive Power BI dashboard?

Accepted Answer

An interactive dashboard presents charts, key performance indicators, tables, maps, filters, and slicers that users can explore to understand business performance.

Question 18

What are slicers in Power BI?

Accepted Answer

Slicers are visual filtering controls that let users select categories, dates, locations, products, or other values to update report visuals.

Question 19

What is drill-through in Power BI?

Accepted Answer

Drill-through allows users to move from a summary visual to a detailed report page filtered for the selected item.

Question 20

How can Power BI support business decision-making?

Accepted Answer

Power BI helps organizations track performance, compare trends, identify exceptions, monitor key indicators, analyse customer behaviour, and communicate findings through interactive reports.

Question 21

How can Power BI reports be optimized?

Accepted Answer

Reports can be optimized by using efficient data models, appropriate relationships, simplified visuals, optimized DAX, reduced data volume, query folding, and careful refresh design.

Question 22

Can Power BI connect to SQL databases?

Accepted Answer

Yes. Power BI can connect to supported SQL databases and import data or query it through available connectivity modes.

Question 23

What practical skills can learners gain from this program?

Accepted Answer

Learners can develop practical skills in SQL querying, data cleaning, table joins, advanced calculations, Power Query, data modelling, DAX, dashboard creation, report design, data storytelling, publishing, and business-intelligence analysis.

Brand	NSTC
Format	Online (e-LMS)
Duration	8 Weeks
Level	Intermediate
Hands-On	Yes – Practical projects with industrial datasets

SQL & Power BI Program: From Foundations to Advanced Techniques

About the Sql Course

Program Highlights

Course Curriculum

Module 1: SQL Fundamentals and Database Management

Module 2: Advanced SQL Topics and Data Aggregation

Module 3: Advanced SQL Techniques, Subqueries, and Database Security

Module 4: SQL Advanced Topics and Database Expertise

Module 5: Advanced SQL Techniques and Database Administration

Module 6: Power BI Program Integrating Advanced SQL

Tools, Techniques, or Platforms Covered

Real-World Applications

Who Should Attend & Prerequisites