Jump to content

Random row in mySQL


LoneAntiTrust
 Share

Recommended Posts

ok, i got this code which is supposed to select a random row in mysql.

 

select * from quotes order by rand() limit 1

 

i have 10 rows in the table, and i seem to get the same row each time! i don\'t understand. maybe after reloading about 50 times i\'ll get one different row, then it will go back to the previous one for another 30 times. i have no idea why it\'s really not randomizing these.

 

any ideas?

Link to comment
Share on other sites

Use a seed value that differs all the time:

 


select * from quotes order by rand($seed) limit 1

 

Use some reandom integer in $seed (time or something).

 

The reason for the problem - probably because you\'re creating a shiny new connection the database each time the page is loaded and the \"not really random\" function in sql returns the same values when a new connection has been initialized (?)....

 

I think the seed is the solution - BUT remeber that the same seed returns the same random value! It would actually be a lot easier to pick a random row using the following (assuming sql and php or something similar):

 


$seed = random(10);

select * from quotes limit by $seed, 1;// picks 1 row from $seed

 

P., denmark

 

ok, i got this code which is supposed to select a random row in mysql.

 

select * from quotes order by rand() limit 1

 

i have 10 rows in the table, and i seem to get the same row each time!  i don\'t understand.  maybe after reloading about 50 times i\'ll get one different row, then it will go back to the previous one for another 30 times.  i have no idea why it\'s really not randomizing these.

 

any ideas?

Link to comment
Share on other sites

This thread is more than a year old. Are you sure you have something important to add to it?

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.