Tuesday, October 7, 2008

Sql query select statement แบบ สุ่ม

Select statement random.

Ref : meelink.com-a1 , meelink.com-a2

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 FROM table
ORDER BY RAND()
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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