SQL 在表中随机取数据在一张10万行产品表（PRoduct）中，随机取10条数据的几种方式：
SET STATISTICS IO ONSELECT TOP 10 ID FROM dbo.Product(NOLOCK)WHERE 0.01 >= CAST(CHECKSUM(NEWID(), ID) & 0x7fffffff AS FLOAT) / CAST(0x7fffffff AS INT)--扫描计数 1，逻辑读取 5 次SELECT TOP 10 * FROM Product ORDER BY NEWID()--扫描计数 17，逻辑读取 11628 次SELECT TOP 10*,NEWID() AS random FROM Product ORDER BY random--扫描计数 16，逻辑读取 11242 次SELECT ID FROM Product WHERE ID IN (SELECT TOP 10 ID FROM Product ORDER BY NEWID())--扫描计数 17，逻辑读取 2014 次