【单选题】关系数据模型的3个组成部分中,不包括( )。
【判断题】Column belonging to a primary key of a table T is allowed to take on NULL values for any row in T.
【单选题】计算机中能直接被CPU存取的信息是存放在( )中
【单选题】计算机中能直接被CPU存取的信息是存放在______中。
【单选题】计算机中能直接被CPU存取的信息是存放在_______ 中。
【多选题】View the Exhibit and examine the resource consumption details for the current plan in use by the database instance.Which two statements are true based on the output?()
A.
An attempt to start a new session by the user belonging to DSS_QUERIES fails with an error
B.
A user belonging to DSS_QUERIES can log in to a new session but the session will be queued
C.
The CPU_WAIT_TIME column indicates the total time that sessions in the consumer group waited for the CPU due to resource management .
D.
The CPU_WAIT_TIME column indicates the total time that sessions in the consumer group waited for the CPU due to resource management, I/O waits, and latch or enqueue contention
【判断题】劳动合同,亦称劳动契约,是指劳动者和用人单位为确立劳动关系,明确双方权利和义务而定的口头协议。
【单选题】关系数据模型的3个组成部分中,不包括下列哪个选项 ( )
【多选题】下列属于老年人的特殊膳食指南内容的是( )