if you have a SQL test coming up for a data analyst interview and you are panicking right, here’s what you need to know LEFT JOIN combines two tables but keeps everything from your main table even when the other table does not have a match. this is on every single SQL test I have ever seen or written COUNT DISTINCT counts unique values. like how many different customers placed an order. not how many total orders. unique. interviewers love asking this because it tells them you actually understand

Las tablas en SQL Server son la base de cualquier base de datos. En esté tutorial aprenderás cómo crear tablas, declarar columnas primarias y tipos de datos correctamente paso a paso. No olvides seguirnos para poder seguir creando más contenido :) #sqlserver #sql #basesdedatos #programacion #aprendersql