Сохраненная страница me talking out loud » Blog Archive » “Getting” Joins (26 Kb)

If you have tried to understand how joins work and constantly get confused about what join to use, you just need to keep a simple picture in mind ( I like pictures). I will be explaining joins by referencing a Venn diagram. Have no fear – I won’t get into any of the set theory/math involved. This is just a basic overview to give you an idea the data a particular join will return to you. This is not a technical discussion – just concepts.