SET STATISTICS IO ON

SELECT 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