MySQL 我们如何区分 LEFT OUTER JOIN 与 Left Join

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时间:2020-08-31 16:01:54  来源:igfitidea点击:

How can we differ LEFT OUTER JOIN vs Left Join

mysqljoinleft-joinouter-join

提问by OM The Eternity

What is the difference between Left Join and Left Outer Join?

之间有Left Join and Left Outer Join什么区别?

回答by Daniel Vassallo

They are the same thing in MySQL. A LEFT JOINis a synonym or shorthand for LEFT OUTER JOIN.

它们在 MySQL 中是一样的。ALEFT JOIN是 的同义词或简写LEFT OUTER JOIN

回答by Mark Byers

There is none. The keyword OUTER is optional. They mean the same.

空无一人。关键字 OUTER 是可选的。他们的意思是一样的。