Question

I’m trying to select a random entry from my database but only from the latest 100 entries. Any thoughts? Thanks.

Answer 1

for MySql –

SELECT * FROM 
   (SELECT * FROM table1 order by created_date desc LIMIT 100) table1_alias
ORDER BY RAND()
LIMIT 1

The inner query here get the top 100 records, you might need to replace created_date with something else.

The outer query is what gives a random record.

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For oracle you will need something like this –

select * from 
  (select * from table1 where rownum < 100 order by created_date desc) table1_alias
where rownum=1 order by dbms_random.value