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๐ Simply SQL (2024)
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Hereโs a roadmap to get you started, step-by-step!
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#SQL #ROADMAP
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Forwarded from Machine Learning with Python
Free Certification Courses to Learn Data Analytics in 2025:
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๐ https://imp.i384100.net/5gmXXo
2. SQL
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1. Python
๐ https://imp.i384100.net/5gmXXo
2. SQL
๐ https://edx.org/learn/relational-databases/stanford-university-databases-relational-databases-and-sql
3. Statistics and R
๐ https://edx.org/learn/r-programming/harvard-university-statistics-and-r
4. Data Science: R Basics
๐https://edx.org/learn/r-programming/harvard-university-data-science-r-basics
5. Excel and PowerBI
๐ https://learn.microsoft.com/en-gb/training/paths/modern-analytics/
6. Data Science: Visualization
๐https://edx.org/learn/data-visualization/harvard-university-data-science-visualization
7. Data Science: Machine Learning
๐https://edx.org/learn/machine-learning/harvard-university-data-science-machine-learning
8. R
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9. Tableau
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10. PowerBI
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11. Data Science: Productivity Tools
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12. Data Science: Probability
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19. Data Science: Wrangling
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21. Probability
๐ https://pll.harvard.edu/course/data-science-probability
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20 most common SQL Interview Questions.
#SQL #Interview
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#๐ฆ๐ค๐ ๐๐ป๐๐ฒ๐ฟ๐๐ถ๐ฒ๐ ๐๐ต๐ฒ๐ฎ๐๐๐ต๐ฒ๐ฒ๐ โ ๐๐ฟ๐ฎ๐ฐ๐ธ ๐๐ป๐ ๐๐ป๐๐ฒ๐ฟ๐๐ถ๐ฒ๐ ๐ช๐ถ๐๐ต ๐ง๐ต๐ฒ๐๐ฒ ๐๐ผ๐ป๐ฐ๐ฒ๐ฝ๐๐
โ ๐ญ. ๐ฆ๐ค๐ ๐๐ผ๐ถ๐ป๐ โ Combine data from multiple tables
๐ก INNER JOIN โ Returns matching records from both tables
๐ก LEFT JOIN โ Returns all records from the left table + matches from the right
๐ก RIGHT JOIN โ Returns all records from the right table + matches from the left
๐ก FULL JOIN โ Returns all records from both tables
โ ๐ฎ. ๐๐๐ง๐ ๐๐๐๐ง๐๐ฅ๐๐ก๐ โ Retrieve specific records efficiently
๐ก WHERE โ Filters rows before aggregation
๐ก HAVING โ Filters after aggregation
๐ก BETWEEN, IN, LIKE โ Advanced filtering
โ ๐ฏ. ๐๐๐๐ฅ๐๐๐๐ง๐๐ข๐ก & ๐๐ฅ๐ข๐จ๐ฃ๐๐ก๐ โ Summarize data
๐ก GROUP BY โ Groups data based on a column
๐ก COUNT, SUM, AVG, MIN, MAX โ Perform calculations
โ ๐ฐ. ๐ฆ๐จ๐๐ค๐จ๐๐ฅ๐๐๐ฆ & ๐๐ง๐๐ โ Break complex queries
๐ก Subquery โ Nested query inside another query
๐ก Common Table Expressions (CTE) โ Temporary named query
โ ๐ฑ. ๐๐ก๐๐๐ซ๐๐ก๐ & ๐ข๐ฃ๐ง๐๐ ๐๐ญ๐๐ง๐๐ข๐ก โ Speed up queries
๐ก Indexes โ Improve search speed
๐ก EXPLAIN PLAN โ Analyze query performance
โ ๐ฒ. ๐๐๐ฉ๐๐ก๐๐๐ ๐ฆ๐ค๐ ๐ง๐ข๐ฃ๐๐๐ฆ
๐ก Window Functions โ RANK, ROW_NUMBER, LEAD, LAG
๐ก Stored Procedures & Triggers โ Automate tasks
๐ก Normalization & Denormalization โ Optimize database design
โก๏ธ BEST DATA SCIENCE CHANNELS ON TELEGRAM ๐
โ ๐ญ. ๐ฆ๐ค๐ ๐๐ผ๐ถ๐ป๐ โ Combine data from multiple tables
๐ก INNER JOIN โ Returns matching records from both tables
๐ก LEFT JOIN โ Returns all records from the left table + matches from the right
๐ก RIGHT JOIN โ Returns all records from the right table + matches from the left
๐ก FULL JOIN โ Returns all records from both tables
โ ๐ฎ. ๐๐๐ง๐ ๐๐๐๐ง๐๐ฅ๐๐ก๐ โ Retrieve specific records efficiently
๐ก WHERE โ Filters rows before aggregation
๐ก HAVING โ Filters after aggregation
๐ก BETWEEN, IN, LIKE โ Advanced filtering
โ ๐ฏ. ๐๐๐๐ฅ๐๐๐๐ง๐๐ข๐ก & ๐๐ฅ๐ข๐จ๐ฃ๐๐ก๐ โ Summarize data
๐ก GROUP BY โ Groups data based on a column
๐ก COUNT, SUM, AVG, MIN, MAX โ Perform calculations
โ ๐ฐ. ๐ฆ๐จ๐๐ค๐จ๐๐ฅ๐๐๐ฆ & ๐๐ง๐๐ โ Break complex queries
๐ก Subquery โ Nested query inside another query
๐ก Common Table Expressions (CTE) โ Temporary named query
โ ๐ฑ. ๐๐ก๐๐๐ซ๐๐ก๐ & ๐ข๐ฃ๐ง๐๐ ๐๐ญ๐๐ง๐๐ข๐ก โ Speed up queries
๐ก Indexes โ Improve search speed
๐ก EXPLAIN PLAN โ Analyze query performance
โ ๐ฒ. ๐๐๐ฉ๐๐ก๐๐๐ ๐ฆ๐ค๐ ๐ง๐ข๐ฃ๐๐๐ฆ
๐ก Window Functions โ RANK, ROW_NUMBER, LEAD, LAG
๐ก Stored Procedures & Triggers โ Automate tasks
๐ก Normalization & Denormalization โ Optimize database design
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SQL Query Optimaztion.pdf
897.9 KB
Your SQL query is running.
And running.
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And running.
And ruuunnniiiiiiiing....โฑ๏ธโฑ๏ธโฑ๏ธโฑ๏ธ
Not so great for a tool meant to enable us quicker access to data, right?
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SQL cheatsheet for download.
#SQL #SQLCheatSheet #Database #DataAnalysis #LearnSQL #SQLQueries #DataScience #DatabaseManagement #FreeDownload #SQLForBeginners
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SQL interview.pdf
3.9 MB
SQL Optimization Interview Questions
#SQL #SQLCheatSheet #Database #DataAnalysis #LearnSQL #SQLQueries #DataScience #DatabaseManagement #FreeDownload #SQLForBeginners
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