Join is a relational operation on two or more tables with a common properties to be combined into a single ... ... <看更多>

I note that none the answers are specific to MySQL, which does have its own semantics in some areas. I would also like to see a decent write-up. – Lightness ... ... <看更多>

1. I don't believe the order should matter but I don't have a MySQL database handy to prove that. · 1. Does it matter No. · When writing a JOIN , ... ... <看更多>