How to generate random numbers and concatenate strings in MySQL

This article mainly introduces the method of generating random numbers and connecting strings in MySQL, briefly analyzes the related functions, and gives the corresponding SQL statement implementation method in the form of examples. Friends who need it can refer to it. I hope it can help everyone. .

Methods used:

concat('a','b','c'); Connection string

rand(); Generate random numbers

##floor(); Get integers

UPDATE user set reg_ip= concat(floor(RAND() * 250),'.',floor(RAND() * 250),'.',floor(RAND() * 250),'.',floor(RAND() * 250)) where username='xxx'

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