SQL Interview QUESTIONS and ANSWERS ✌- Transfrom ROWS to COLUMNS in SQL.

Опубликовано: 27 Октябрь 2023
на канале: Data From Zero to Hero

102

This SQL (Challenging SQL Query INTERVIEW Problem ✌-Transfrom ROWS to COLUMNS in SQL) lesson tackles a common interview problem by calculating the total sales for the years 2010, 2015, and 2022 from a dataset stored in the "salestable." The query cleverly uses conditional aggregation, utilizing CASE statements, to extract the sales data for each specific year. It demonstrates a fundamental skill in SQL: summarizing data based on conditions, making it valuable for SQL interview preparation and real-world data analysis scenarios.

Chapters:
03:05 - Solution 1
09:30 - Solution 2

#sql #sqlinterview #dataanalysis

Download the dataset, scripts, and solution:
https://github.com/Rruhid/sql_data/bl...

Installing jupyter notebook and run the server:
   • PostgreSQL TUTORİAL for Beginners - P...

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