So many times I have been asked for help with a query, where the questoin really comes down to the understanding of the difference between INNER and LEFT or RIGHT JOINs. I created this poster a few years ago and…Read more › Más
A SQL JOIN is a method to retrieve data from two or more database tables. This article presents a basic overview of what data from a particular SQL join will look like. Get to know the most useful types of SQL JOIN clauses and learn how they work.
The Difference Between SQL Join Conditions Into "ON" And "WHERE" Clauses.Some of us while writing an SQL select statement with a join between two tables or more may get confused with whether to add a certain condition to the "ON" clause of the join or just add it to the "WHERE" clause as if it is just a filtering condition. Some people may think that both approaches are always the same. This is not completely true.