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随机获取10条记录

2010-05-18 16:34 429 查看
mysql:    select * from tablename order by rand() limit 10
sqlserver:    select top 10 * from tablename order by NEWID()

Sqlite:Select * From tablename order by random(*) limit 10

Oracle:

SELECT column FROM
( SELECT column FROM table
ORDER BY dbms_random.value )
WHERE rownum <= 10

PostgreSQL:

SELECT column FROM table
ORDER BY RANDOM()
LIMIT 10
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