Leader specific functions
Leader nodes have special functions that run only on them, a common source of errors. For example, you should always use the SUBSTRING function and avoid SUBSTR. Let's experiment and see why.
Este ejercicio forma parte del curso
Introduction to Redshift
Ejercicio interactivo práctico
Prueba este ejercicio y completa el código de muestra.
-- Use SUBSTR on 'datacamp' starting at 4 as extract
SELECT ___('___', ___) AS ___;