获取一个随机数，并检查mysql id是否存在

Question

I want to generate a random number and search for the entry by id in a mysql database I select and if this id does not exist in the database, search for a new one, as long as the script finds one.Then output some line form this row. sounds easy but don't know how to handle the errors.

found this one:

    SELECT name, address, ROUND(100.0 + 400.0 * RAND()) AS random_number
    FROM users

but here isn't the error handler included. Can you help here?

Answer 1

If you want one random record you can use ORDER BY RAND() LIMIT 1

SELECT name, address FROM users ORDER BY RAND() LIMIT 1

This will give you one random user.