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Hello! Welcome to the 28th session of the Python Master Course. In the previous Lesson 27, we mastered decorators. This time, it's context managers. In Lesson 16, we learned the 'with open(...) as f:' ...

44. How do you handle complex joins in SQL? 45. What is an index seek and index scan? 46. What are the advantages and disadvantages of indexing? 47. How does SQL Server handle locking and concurrency?

Every DBA and Developer knows the struggle: You need a table with 100k+ rows for performance testing, query optimization, or indexing drills, but you don't have a real dataset at hand. In PostgreSQL, ...

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