Question

I have this query:

 mysql_query("
    UPDATE users SET

    `clicks_yesterday`=`clicks_today`,`clicks_today`=0) 

My structure in my database looks like this:

My question is, how can I do so whenever I run the query above, clicks_yesterday get’s the value of clicks_today?

Regards

Answer 1

That’s how you do it. assignments in SQL are evaluated in the order encountered (e.g. left -> right). But if you want to be ENTIRELY sure that things are assigned properly, then split it into two queries:

UPDATE users SET clicks_yesterday = clicks_today;
UPDATE users SET clicks_today = 0;