当前位置: Oracle DBA培训网-优技培训 >> 082题库 >

Oracle OCP 19c 认证1Z0-082考试题库(第24题)

Oracle OCP 19c 认证1Z0-082考试题库(第24题)

Oracle OCP 19c 认证1Z0-082考试题库(第24题)-CUUG内部学员版082题库解析

24、Evaluate these commands which execute successfully:

CREATE SEQUENCE ord_seq

INCREMENT BY 1

START WITH 1

MAXVALUE 100000

CYCLE

CACHE 5000;

CREATE TABLE ord_items(

ord_no NUMBER(4) DEFAULT ord_seq.NEXTVALUE NOT NULL,

item_no NUMBER(3),

qty NUMBER(3),

expiry_date DATE,

CONSTRAINT it_pk PRIMARY KEY(ord_no,item_no),

CONSTRAINIT ord_fk FOREIGN KEY(ord_no) REFERENCES orders (ord_no));

Which two statements are true about the ORD_ITEMS table and the ORD_SEQ sequence? (Choose two.)

A. If sequence ORD_SEQ is dropped then the default value for column ORD_NO will be NULL for rows inserted into ORD_ITEMS

B. Any user inserting rows into table ORD_ITEMS must have been granted access to sequence ORD_SEQ

C. Column ORD_NO gets the next number from sequence ORD_SEQ whenever a row is inserted into ORD_ITEMS and no explicit value is given for ORD_NO

D. Sequence ORD_SEQ cycles back to 1 after every 5000 numbers and can cycle 20 times

E. Sequence ORD_SEQ is guaranteed not to generate duplicate numbers

技术沙龙MORE+

标签错误:<!-- #Label# labelId=20160707140604 moduleId=1 classId=12231768634 orderby=2 fields=url,title,u_info attribute= datatypeId=22192428132 recordCount=3 pageSize= <htmlTemplate><dt><img src="/images/index_26${index}.jpg" width="100" height="62" /><a href="$url" title="${title}">${title}</a><span>${api.left(u_info,60)}</span></dt></htmlTemplate> -->
我要参加技术沙龙