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
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 JOIN
is 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。