对于下列语句TeacherNo INT NOT NULL UNIQUE,正确的描述是()
具有UNIQUE约束的字段的值不能重复。()
对于下列语句TeacherNo INT NOT NULL UNIQUE,正确的描述是()
A computer is connected to the network through a NIC, which has a unique assignment that is called the Ethernet MAC address. Which layer of the OSI model does the MAC address use to communicate with the network?()
UNIQUE约束强制了数据的()
What is the foundation of the unique deep-sea communities?
As each MSI message will have a unique identity, the printing of messages already received correctly is().
Which configuration prevents traffic that is sourced from the unique local address scope to be sent out ofthe link to the upstream service provider?()
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Which two features are unique to SPA 525 phones compared to SPA 501, SPA 502, and SPA 508 phones? ()