📚 데이터베이스
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[postgres] postgres ecosystem 이해📚 데이터베이스 2023. 2. 9. 10:11
How to run /connect postgres server 1) psql 2) pgAdmin https://www.freecodecamp.org/news/how-to-get-started-with-postgresql-9d3bc1dd1b11/ How to get started with PostgreSQL by Akul Tomar How to get started with PostgreSQL PostgreSQL is an open source Relational Database Management System (RDBMS). In this article, I’ll provide an introduction to getting started with PostgreSQL. Here is what we’ll..
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[JSONiq] practice JSONiq in RumbleDB📚 데이터베이스/빅데이터 2022. 8. 8. 06:47
https://colab.research.google.com/github/RumbleDB/rumble/blob/master/RumbleSandbox.ipynb#scrollTo=nkuOUsukRBQb RumbleSandbox.ipynb Run, share, and edit Python notebooks colab.research.google.com official docs for JSONiq : https://www.jsoniq.org/docs/JSONiq/webhelp/index.html
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[MapReduce] 그림으로 이해하는 하둡 맵리듀스 예제📚 데이터베이스/빅데이터 2022. 8. 3. 01:15
word counting example 1) first, text file should be converted to key-value type 2) map function can map each word to value one 3) same key will be grouped and passed to reducer. then reduce function can just sum values over same key how selection works how projection works