Detailed explanation of how to use MySQL to generate random numbers and connect strings

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

The example in this article describes the method of MySQL generating random numbers and concatenating strings. Share it with everyone for your reference, the details are as follows:

Method used:

concat('a','b','c'); Connecting characters String

rand(); Generate a random number

floor(); Take an integer

SQL statement example:

The code is as follows:

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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