[单选]
Evaluate the CREATE TABLE statement：
CREATE TABLE products
（product_id NUMBER （6）
CONSTRAINT prod_id_pk PRIMARY KEY， product_name VARCHAR2 （15））；
Which statement is true regarding the PROD_ID_PK constraint？（）

A . It would be created only if a unique index is manually created first.
B . It would be created and would use an automatically created unique index.
C . It would be created and would use an automatically created nonunique index.
D . It would be created and remains in a disabled state because no index is specified in the command.

一次运动治疗时间可以分为（）、（）、（）3个部分。某胃癌患者，经胃镜证实胃小弯直径约1cm癌性溃疡，无出血，CT检查无腹腔淋巴结转移。左锁骨上淋巴结未扪到。治疗宜采用（）根治性手术。姑息性手术。钻-60治疗。联合化疗。中药调理。发展经济学 Which statement is true about Oracle Net Listener?（） It acts as the listening endpoint for the Oracle database instance for all local and non-local user connections.。 A single listener can service only one database instance and multiple remote client connections.。 Service registration with the listener is performed by the process monitor (PMON) process of each database instance.。 The listener.ora configuration file must be configured with one or more listening protocol addresses to allow remote users to connect to a database instance.。组织开展家庭美德和反家庭暴力宣传教育的是（）。法院。妇女联合会。共产主义青年团。工会。

Evaluate the CREATE TABLE statement：
CREATE TABLE products
（product_id NUMBER （6）
CONSTRAINT prod_id_pk PRIMARY KEY， product_name VARCHAR2 （15））；
Which statement is true regarding the PROD_ID_PK constraint？（）

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[单选] Evaluate the CREATE TABLE statement： CREATE TABLE products （product_id NUMBER （6） CONSTRAINT prod_id_pk PRIMARY KEY， product_name VARCHAR2 （15））； Which statement is true regarding the PROD_ID_PK constraint？（）

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[单选]
Evaluate the CREATE TABLE statement：
CREATE TABLE products
（product_id NUMBER （6）
CONSTRAINT prod_id_pk PRIMARY KEY， product_name VARCHAR2 （15））；
Which statement is true regarding the PROD_ID_PK constraint？（）