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      1. 使用 MYSQL 创建一个随机数

        creating a random number using MYSQL(使用 MYSQL 创建一个随机数)
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                  本文介绍了使用 MYSQL 创建一个随机数的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我想知道有没有办法选择 100 到 500 之间随机生成的数字以及选择查询.

                  I would like to know is there a way to select randomly generated number between 100 and 500 along with a select query.

                  例如:SELECT name, address, random_number FROM users

                  我不必将此数字存储在 db 中,仅用于显示目的.

                  I dont have to store this number in db and only to use it to display purpose.

                  我尝试过类似这样的方法,但无法正常工作..

                  I tried it something like this, but it can't get to work..

                  SELECT name, address, FLOOR(RAND() * 500) AS random_number FROM users
                  

                  希望有人帮助我.谢谢

                  推荐答案

                  这应该给你想要的:

                  FLOOR(RAND() * 401) + 100
                  

                  通常,FLOOR(RAND() * ( - + 1)) + 生成之间的数字>> 和 包括在内.

                  Generically, FLOOR(RAND() * (<max> - <min> + 1)) + <min> generates a number between <min> and <max> inclusive.

                  更新

                  这个完整的声明应该有效:

                  This full statement should work:

                  SELECT name, address, FLOOR(RAND() * 401) + 100 AS `random_number` 
                  FROM users
                  

                  这篇关于使用 MYSQL 创建一个随机数的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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