How to quickly SELECT 3 random records from a 30k MySQL table with a where filter by a single query?

Question

Well, this is a very old question never gotten real solution. We want 3 random rows from a table with about 30k records. The table is not so big in point of view MySQL, but

Answer 1

SELECT Products.ID, Products.Name
FROM Products
INNER JOIN (SELECT (RAND() * (SELECT MAX(ID) FROM Products)) AS ID) AS t ON Products.ID     >= t.ID
WHERE (Products.HasImages=1)
ORDER BY Products.ID ASC
LIMIT 3;

Of course the above is given "near" contiguous records you are feeding it the same ID every time without much regard to the seed of the rand function.

This should give more "randomness"

SELECT Products.ID, Products.Name
FROM Products
INNER JOIN (SELECT (ROUND((RAND() * (max-min))+min)) AS ID) AS t ON Products.ID     >= t.ID
WHERE (Products.HasImages=1)
ORDER BY Products.ID ASC
LIMIT 3;

Where max and min are two values you choose, lets say for example sake:

max = select max(id)
min = 225