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This article mainly introduces how to use all in mysql, which has certain reference value and can be used for reference by friends who need it. I hope you will learn a lot after reading this article. Next, let the editor take you to learn about it.

The usage of all in mysql: 1. All is "for all the values in the columns returned by the subquery, if the comparison result is true, true is returned"; 2. All can be associated with [=, >, > =, result1 or S1 > result2 or S2 > result3

The use of all is equivalent to the and' of the 'or' buffer' of the above statement

Speaking of this, you may already know that any and or are often used to compare two tables, when you don't know the specific value behind where, you can use any,all to help you determine.

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