Reliance Retail Senior Data Analyst Interview Questions and Answers

Q1. Difference between SQL /NON SQL
Ans. 
SQL is a structured query language used for relational databases, while NoSQL is a non-relational database management system.
• SQL is used for structured data with predefined schema, while NoSQL is used for unstructured or semi-structured data.

• SQL databases are vertically scalable, while NoSQL databases are horizontally scalable.

• SQL databases are ACID compliant, ensuring data integrity, while NoSQL databases sacrifice so...read more
Answered by AI
Add your answer

Q1. About sql, python, visualaization
Add your answer

Q1. About sql and business kpi's
Add your answer

Q1. Sql and business kpi's
Add your answer

Q1. Salary negotiation
Add your answer

Q1. Python questions dataframe creata
Add your answer
Q2. SQL questions joins , windows function,cte
Add your answer

Q1. Prepare All theoretical questions related to SQL and excel. Learn everything about your resume so that you will be able to explain each and everything about the resume.
Add your answer
Q2. Difference between Vlookup and Xlookup ?
Ans. 
Vlookup searches for a value in the first column of a range and returns a value in the same row from a specified column. Xlookup is a more powerful and flexible function that can search in any direction and return multiple results.
• Vlookup searches vertically in a table and returns a value from a specified column.

• Xlookup can search in any direction (horizontal, vertical, or both) and return multiple results.

• Vlookup requ...read more
Answered by AI
Add your answer
Q3. Difference between Subquery and CTE. Which is better?
Ans. 
Subquery is a query nested within another query, while CTE is a temporary result set defined within a query. Both have their own use cases.
• Subquery is enclosed in parentheses and can be used in SELECT, INSERT, UPDATE, or DELETE statements.

• CTE is defined using the WITH keyword and can be referenced multiple times in a query.

• CTEs are more readable and easier to maintain compared to subqueries.

• Subqueries are useful when t...read more
Answered by AI
Add your answer
Q4. No of records returned after applying left and inner join on 2 tables.
Add your answer
Q5. Pivot the table in SQL using case when statements.
Ans. 
Pivoting a table in SQL using case when statements
• Use the CASE WHEN statement to create new columns based on specific conditions

• Use the SUM or COUNT function to aggregate data in the pivoted table

• Group by the remaining columns to ensure correct aggregation

• Example: SELECT id, SUM(CASE WHEN category = 'A' THEN value END) AS A_total FROM table_name GROUP BY id;
Answered by AI
Add your answer

Business Case Questions Based on a scenario where the company's Sales is Declining. How we can address the issue using transaction data

Q1. Write sql query on leet code
Ans. 
SQL query on LeetCode platform for business analysis.
• Use SELECT statement to retrieve data from database tables.

• Use JOIN clause to combine data from multiple tables.

• Use WHERE clause to filter data based on specific conditions.
Answered by AI
Add your answer
Q2. Power BI interview questions
Add your answer