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You're struggling to improve your SQL skills in Data Warehousing. What's the best way to get ahead?

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If you want to advance your career in data warehousing, you need to master SQL, the language of databases. SQL stands for Structured Query Language, and it allows you to manipulate, analyze, and transform data stored in relational databases. However, learning SQL can be challenging, especially if you don't have a clear path or guidance. In this article, we'll share some tips on how to improve your SQL skills in data warehousing and why mentorship can make a big difference.

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1 Understand the basics

Before you dive into the complex aspects of data warehousing, such as dimensional modeling, star schemas, and ETL processes, you need to have a solid foundation in SQL. This means you should know how to write basic queries, such as SELECT, FROM, WHERE, GROUP BY, and JOIN, and how to use functions, operators, and aliases. You should also be familiar with the common data types, such as integers, strings, dates, and booleans, and how to handle null values and errors. You can find many online resources, such as tutorials, videos, and courses, to help you learn the basics of SQL.

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Vinaya Rajaram Nayak

Data Analyst | Ex-Accenture | SQL | Python | Tableau | PowerBI | Snowflake | AWS Certified Data Engineer | Master of Science in Business Analytics and Information Systems
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Start by strengthening your understanding of SQL fundamentals. Focus on mastering concepts like joins, subqueries, and functions, which are frequently used in Data Warehousing. Apply what you’ve learned by working on real-world projects or datasets, which could involve tasks like data cleaning, aggregation, or analysis. You can practice questions in Leetcode or HackerRank.

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Meghanjali Chennupati

AI / Mlops Engineer at Mutual of Omaha | Graduated from University of South Florida | Former Assistant Engineer in Data Science/Data Eng/App Developer in Renewable Energy at Utopus Insights.
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Firstly get familiar with commands and its usage . Next u concentrate on basics of sql Next you go for joins type of joins practice some queries later you try to take some questions with scenario based . I mean to say hacker rank is one good platform especially for sql . You will be having basic intermediate and advanced level type . You finish those then concentrate on techniques in data warehousing like dimensionality modeling . Start slow you take some example data base start practicing by taking 5 questions . In this way you can improve it is very fundamental for any type of job in data side so sql always is helpful and mandatory .

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Shreyas Shukla

I Can Help You learn AI || IIT Kharagpur Alum || Microsoft Azure Certified Data Engineer Associate || 3 × Azure || Python || SQL || 5?SQL HackerRank
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As the case with any skill, the best way to improve is to go back and work on your basics. See if you got fundamentals right. Understand nuances like syntax, data types, functions and various queries like SELECT, JOIN, GROUP BY, HAVING etc. Refer online resources like tutorials, YouTube videos etc. Once this is done, start with some practice platform like HackerRank, HackerEarth or Leetcode. Get comfortable and have enough practice before moving to complex concepts like schemas, dimensional modelling etc.

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Jishnu Rajeev

Business Intelligence Engineer ? Visual Storyteller ? LinkedIn Top Voice ? Microsoft Certified Power BI Developer ? Power Automate ? Microsoft Power Platforms ? Data Engineer ? | Enabling Data Driven Decision Making
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SQL is the standard language for managing and manipulating relational databases. At its core, SQL enables users to interact with databases by querying, updating, and managing data. Mastering the basics of SQL opens doors to efficiently retrieve information using SELECT statements, filter data with WHERE clauses, and organize results with ORDER BY. Understanding data types, table creation, and key concepts like PRIMARY KEY and FOREIGN KEY are foundational. As users progress, learning joins becomes crucial for combining data from multiple tables, while functions like COUNT and SUM facilitate data analysis. Constraints, such as NOT NULL and UNIQUE, ensure data integrity.

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Sokngim Cheav

Supervisor, Reporting at Phillip Bank Plc
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1. Understand the basic of SQL 2. Go only for data warehouse concept 3. Learn advance sql for any platform 4. Practice 5. Hand on it 6. Learn real life case 7. Collaborative 8. Collect feedback 9. Join online course and training

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2 Practice with real data

One of the best ways to improve your SQL skills is to practice with real data sets that are relevant to data warehousing. You can use online platforms, such as SQLZOO, HackerRank, or LeetCode, to solve SQL challenges and test your knowledge. You can also download sample databases, such as AdventureWorks, Northwind, or Chinook, and explore them using a SQL client, such as MySQL Workbench, SQL Server Management Studio, or pgAdmin. By practicing with real data, you can learn how to deal with different scenarios, such as filtering, aggregating, joining, and subquerying data, and how to optimize your queries for performance.

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Jishnu Rajeev

Business Intelligence Engineer ? Visual Storyteller ? LinkedIn Top Voice ? Microsoft Certified Power BI Developer ? Power Automate ? Microsoft Power Platforms ? Data Engineer ? | Enabling Data Driven Decision Making
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The only way to improve your SQL expertise is to practice on real data. If there are no options to do so in your work, look out for other platforms such as leetcode, hackerrank etc. W3schools is also a great place to learn SQL.

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3 Learn from others

Another effective way to improve your SQL skills is to learn from others who have more experience and expertise in data warehousing. You can join online communities, such as Stack Overflow, Reddit, or Quora, and ask questions, read answers, and follow discussions related to SQL and data warehousing. You can also participate in webinars, podcasts, or blogs that cover topics such as data modeling, data quality, data integration, and data analysis. By learning from others, you can gain insights, tips, and best practices that can help you solve problems and avoid mistakes.

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Jishnu Rajeev

Business Intelligence Engineer ? Visual Storyteller ? LinkedIn Top Voice ? Microsoft Certified Power BI Developer ? Power Automate ? Microsoft Power Platforms ? Data Engineer ? | Enabling Data Driven Decision Making
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I would like to share a different approach when learning from others. You can definitely use stack overflow or SQL shack to search for solutions, but I would suggest learning SQL best practices by looking into code that is already in production that was written by your team mates. Look how it has been written, how it has been implemented etc. I have learnt more from this rather than any online resources.

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4 Seek feedback

One of the most important steps in learning SQL is to seek feedback on your work. Feedback can help you identify your strengths and weaknesses, correct your errors, and improve your skills. However, finding feedback can be difficult, especially if you don't have a mentor or a peer group to support you. That's why we recommend that you find a mentor who can guide you, coach you, and challenge you in your SQL journey. A mentor can be someone who works in data warehousing, who teaches SQL, or who has a similar learning goal as you. You can find a mentor through online platforms, such as MentorCruise, Codementor, or Upwork, or through your network, such as your colleagues, friends, or alumni.

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5 Keep learning

Finally, the best way to improve your SQL skills in data warehousing is to keep learning and expanding your knowledge. SQL is a vast and evolving language, and data warehousing is a dynamic and diverse field. You should always be curious and eager to learn new things, such as advanced SQL features, such as window functions, common table expressions, and recursive queries, or new data warehousing technologies, such as cloud platforms, data lakes, or data pipelines. You should also keep track of your progress, set goals, and celebrate your achievements. By keeping learning, you can stay ahead of the curve and become a proficient and confident SQL user.

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6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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You're struggling to improve your SQL skills in Data Warehousing. What's the best way to get ahead?

1

2

3

4

5

6

1 Understand the basics

2 Practice with real data

3 Learn from others

4 Seek feedback

5 Keep learning

6 Here’s what else to consider

Data Warehousing

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You're struggling to improve your SQL skills in Data Warehousing. What's the best way to get ahead?

1

2

3

4

5

6

1 Understand the basics

2 Practice with real data

3 Learn from others

4 Seek feedback

5 Keep learning

6 Here’s what else to consider

Data Warehousing

给文章评分

感谢您的反馈

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