1. Solid problem-solving and critical-thinking skills
2. Good knowledge of statistics
3. Strong knowledge of databases
4. Proficient with SQL (PostgreSQL, MySQL).
- Data Warehouse Designing Principles (cubes, dimensions, etc)
- JOIN operators (INNER JOIN, OUTER JOIN, LEFT JOIN, CROSS JOIN, etc)
- SET THEORY (UNION, INTERSECT, MINUS)
- DATA TYPES and CASTING operators
- SQL performance optimization (temp tables, indexes, sub-queries, etc)
- Logical and conditional operators (AND, OR, CASE, DECODE)
5. Good knowledge of Python and Python libraries (matplotlib, seaborn, numpy)
6. Data visualization skills (Tableau/Power BI/Looker)
7. Presentation skills.
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