Bo's blog

Wednesday, March 10, 2010

Select a random row from a database table

Select a random row with MySQL:
SELECT column FROM table
ORDER BY RAND()
LIMIT 1



Select a random row with PostgreSQL:



SELECT column FROM table
ORDER BY RANDOM()
LIMIT 1



Select a random row with Microsoft SQL Server:



SELECT TOP 1 column FROM table
ORDER BY NEWID()



Select a random row with IBM DB2



SELECT column, RAND() as IDX 
FROM table
ORDER BY IDX FETCH FIRST 1 ROWS ONLY



Select a random record with Oracle:



SELECT column FROM
( SELECT column FROM table
ORDER BY dbms_random.value )
WHERE rownum = 1

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