1. Database MySQL:
SELECT column FROM table
ORDER BY RAND()
LIMIT 1
2. Database PostgreSQL:
SELECT column FROM table
ORDER BY RANDOM()
LIMIT 1
3. Database Microsoft SQL Server:
SELECT TOP 1 column FROM table
ORDER BY NEWID()
4. Database IBM DB2:
SELECT column, RAND() as IDX
FROM table
ORDER BY IDX FETCH FIRST 1 ROWS ONLY
Thanks Tim
5. Database Oracle:
SELECT column FROM
( SELECT column FROM table
ORDER BY dbms_random.value )
WHERE rownum = 1
Thanks Mark Murphy
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