Lowe's Senior Data Analyst Interview Questions and Answers

Q1. About sql, python, visualaization
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Q1. About sql and business kpi's
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Q1. Sql and business kpi's
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Q1. Salary negotiation
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Q1. Python questions dataframe creata
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Q2. SQL questions joins , windows function,cte
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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.
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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
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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
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Q4. No of records returned after applying left and inner join on 2 tables.
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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;
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Business Case Questions Based on a scenario where the company's Sales is Declining. How we can address the issue using transaction data

60 question 90 minutes

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