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advanced-SQL

This is a repository about advanced SQL course in kaggle

Buils on

Python, Intro to SQL

Learnign Platform

Kaggle

Course Link

https://www.kaggle.com/learn/advanced-sql

References

Google Cloud BigQuery Legacy


Content

  1. JOINs and UNIONs

    • Combinación de múltiples filas y columnas de tablas.
      • JOINs: INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN.
      • UNIONs: UNION, UNION ALL, UNION DISTINCT.
    • CTE + JOINs
    • Función tail(), MIN(), TIMESTAMP_DIFF().
    • Exercicios y ejemplos de JOINs y UNIONs. Además de calculo de tiempo de respuesta de un sistema.
  2. Analytic Fuctions

    • Introducción a las funciones analíticas.
      • OVER, PARTITION BY, ORDER BY.
    • Window Frame.
    • Tres tipos de funciones analíticas:
      • Analytic Aggregate Functions: AVG(), SUM(), COUNT(), MIN(), MAX().
      • Analytic Navigation Functions: LEAD(), LAG(), FIRST_VALUE(), LAST_VALUE().
      • Analytic Numbering Functions: ROW_NUMBER(), RANK(), DENSE_RANK(), NTILE().
    • Ejemplos
      • Contar número acumulado de viajes por día.
      • Calcular el inicio y fin de estacionamiento de bicis.
    • Ejercicios
      • Predecir la demanda de taxis.(AVG())
      • Separar y ordenar viajes por área de la comunidad.(RANK())
      • Tiempo entre viajes.(LAG(), TIMESTAMP_DIFF())
  3. Nested and Repeat Data

  4. Writing Efficiet Queries

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