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