隨機取出資料的方法

各種資料庫軟體, 有不同的 SQL command

mySql
SELECT column FROM table
ORDER BY RAND()
LIMIT 1

PostgreSQL
SELECT column FROM table
ORDER BY RANDOM()
LIMIT 1

Microsoft SQL Server
SELECT TOP 1 column FROM table
ORDER BY NEWID()

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