是的，机器之间不可能有重复.

Yes, there is no chance of a duplicate between machines.

NEWID() 基于伪随机数(来自时钟)和主 NIC 的 MAC 地址的组合.

NEWID() is based on a combination of a pseudo random number (from the clock) and the MAC address of the primary NIC.

然而，像这样插入随机数作为表上的聚集键对性能来说是很糟糕的.您应该考虑使用 NEWSEQUENTIALID() 或 COMB 类型的函数来生成 GUID，这些函数仍提供 NEWID() 的冲突避免优势，同时仍保持可接受的 INSERT 性能.

However, inserting random numbers like this as the clustered key on a table is terrible for performance. You should consider either NEWSEQUENTIALID() or a COMB-type function for generating GUIDs that still offer the collision-avoidance benefits of NEWID() while still maintaining acceptable INSERT performance.