When you execute a query using the LEFT JOIN syntax, SQL does two things: It returns all of the records from both tables that contain matching values, as defined by the ON clause.

There must be some reason he's preferring the left join, though it's not obvious from the example. As far as equivalence, they're not going to have the same effect.

QL Joins are a crucial part of database management, helping you retrieve related data from different tables in a structured way. Allows you to combine data from multiple tables based on related ...