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Data Visualization

Data Analytics in Mr. Plan ₿ Publication

Aug 24

Data Analyst vs Data Engineer vs Data Scientist ✅

Skills required to become a Data Analyst 👇

- Advanced Excel: Proficiency in Excel is crucial for data manipulation, analysis, and creating dashboards.
- SQL/Oracle: SQL is essential for querying databases to extract…

1 response

Data Analytics in Mr. Plan ₿ Publication

Aug 2

SQL Essential Functions 👇👇

### DATE AND TIME FUNCTIONS:
- NOW(): Returns the current date and time.
- CURDATE(): Returns the current date.
- CURTIME(): Returns the current time.
- DATE(): Extracts the date part of a date or datetime expression.
- DATEDIFF(): Returns the number of days between two date…

Data Analytics in Mr. Plan ₿ Publication

Jul 28

Data Analyst Learning Plan in 2024

1 response

Data Analytics in Mr. Plan ₿ Publication

Jul 15

Power BI Interview Preparation Part-11 👇

What is DAX (Data Analysis Expressions) in Power BI, and why is it important?

Answer:

DAX (Data Analysis Expressions):
- Definition: DAX is a formula language used in Power BI, Power Pivot, and Analysis…

Data Analytics in Mr. Plan ₿ Publication

Jun 30

Top 20 SQL queries and concepts that are commonly useful:

1. SELECT statement: Basic querying of data.

SELECT * FROM table_name;

2. WHERE clause: Filtering rows based on conditions.

SELECT * FROM table_name WHERE condition;

3. ORDER BY: Sorting results.

SELECT * FROM…

Data Analytics in Mr. Plan ₿ Publication

Jun 28

SQL INTERVIEW PREPARATION PART-22

What are aggregate and analytic functions in SQL? Provide examples of each.

Answer:
- Aggregate functions perform calculations on a set of values and return a single value. Examples include SUM(), AVG(), COUNT(), MIN(), and MAX().

Data Analytics in Mr. Plan ₿ Publication

Jun 27

SQL INTERVIEW PREPARATION PART-21

How can you optimize a slow-running query in SQL?

Answer:
Optimizing a slow-running query can involve several strategies:

Data Analytics in Mr. Plan ₿ Publication

Jun 27

Power BI Interview Preparation Part-7 👇👇

What is query folding in Power BI and why is it important?

Answer:

Query folding is a process in Power BI where operations performed in the Power Query Editor are pushed back to the data source for…

Data Analytics in Mr. Plan ₿ Publication

Jun 15

Power BI Interview Preparation Part-3

3. What is a calculated column, and how does it differ from a measure in Power BI?

Answer:

Calculated Column:
- Definition: A calculated column is a new column that you add to your data model. It is computed…

Data Analytics in Mr. Plan ₿ Publication

Jun 14

SQL INTERVIEW PREPARATION PART-11

What is a self join in SQL? Provide an example.

A self join is a regular join but the table is joined with itself. This is useful when the data is hierarchical or when you need to compare rows within the same table.