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‎Readme.md

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- [High Performance Computation](./hpc)
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- [Git and GitHub](./git)
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- [Database Management Systems](./dbms)
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- [Digital Product](./digital_product)

‎dbms/concepts.md

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A **non-clustered index**, on the other hand, does not alter the physical order of the rows. It creates a separate structure within the table which holds the values of the indexed columns and pointers to the corresponding rows. A table can have multiple non-clustered indexes.
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Both can store either values or pointers.
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## Left-Deep Plans / Right-Deep Plans
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In a **left-deep join** tree, the left child of each join node is always a base table, not another join. This allows for the possibility of using nested loops joins efficiently, where the left table can be kept in memory while the right table is scanned multiple times. It is advantageous in scenarios where indexes are available on the inner tables.

‎digital_product/cheatsheet.md

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# Cheat Sheets

‎digital_product/concepts.md

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# Key Concepts

‎digital_product/learn.md

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# 🧭 Learn Digital Product Together
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Awesome list of high-quality study materials for learning Digital Product.
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[:arrow_down: Tags legend](#tags-legend) at the end of the page.
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<!-- - []() by []() :movie_camera: -->
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<!-- - []() by []() :movie_camera: :mortar_board: -->
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## Problem Solving
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- [Root cause analysis](https://www.youtube.com/playlist?list=PLxENun6kHfaB4vJsQAO4zXgDbXZ-1i8l_) by [skilltecs](https://www.youtube.com/@skilltecs) :movie_camera: :mortar_board:
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## Tags legend
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##### Kind of Resource
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- :movie_camera: - video material to watch
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- :page_facing_up: - reading
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- :book: - a book
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- :mortar_board: - online course with or without feedback
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- :chart_with_upwards_trend: - cheat sheets
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- :card_file_box: - reference or manual or a standard
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- :open_file_folder: - collections of collections
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- :pirate_flag: - non-english
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- :page_facing_up: - either single article or single video-tutorial
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- :building_construction: - ideas for inspiration of mini-projects to add to your portfolio
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- :moneybag: - paid
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- ( _certificate_ ) - certification
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- 🔽 - download
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- ⚡ - practice, it is possible to interact and get feedback from the system
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- ( _official_ ) - official material
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- ( _blog_ ) - blogs
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- ( _example_ ) - code sample that can be executed
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- ( _short_ ) - short overview
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- ( _tool_ ) - a tool
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- ( _subjects_ ) - people and organizations
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- ( _skill_ ) - not a theory, but practices oriented
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##### Level of Expertise
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- ( _level_0_ ) - very basic and trivial, every professional should know no matter which specialization
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- ( _level_1_ ) - basic but not trivial, every professional should know no matter which specialization
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- ( _level_2_ ) - medium proficiency, most professional should know no matter which specialization
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- ( _level_3_ ) - advanced, not recommended unless it fits specialization
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##### Other Categories
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- ( _Digital Product_ ) - database manageement systems

‎digital_product/questions.md

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# Questions for interview

‎digital_product/readme.md

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# 🧭 Learn Digital Product Together
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Awesome collection of learning materials to master modern Digital Product.
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![SQL Join](./cheatsheet/sql_join.jpg)
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## What is this about?
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This repostory contains dozen curated collections: learning materials, toolboxes, newspapers, working groups, collection of other collections. Everything you will find useful if you are interested in Digital Product.
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Here you can find:
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- __:mortar_board:__ [Learn](./learn.md) : collection of materials to master Digital Product.
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- __:old_key:__ [Comprehend](./concepts.md) : key concepts and dichotomies of Digital Product.
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- __:chart_with_upwards_trend:__ [Systemize](./cheatsheets.md) : cheatsheets on Digital Product.

‎digital_product/skills.md

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# Key skills/competences

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