How to select ORDER BY column and RAND() both?

问题

Hello dear friends.

mysql_query("SELECT id FROM tb_table ORDER BY num ASC, ORDER BY RAND() LIMIT 1");

is this coding correct? I want to find all rows ASC num and there can be 1000 rows that num is 1 another 1000 that num is 2. But I want it to sort ASC like 1s firstly and choose one of them randomly.

回答1:

You only need to specify ORDER BY once.

mysql_query("SELECT id FROM tb_table ORDER BY num ASC, RAND() LIMIT 1");

来源：https://stackoverflow.com/questions/7920574/how-to-select-order-by-column-and-rand-both