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PostgreSQL从小白到专家，是从入门逐渐能力提升的一个系列教程，内容包括对PG基础的认知、包括安装使用、包括角色权限、包括维护管理、、等内容，希望对热爱PG、学习PG的同学们有帮助，欢迎持续关注CUUG PG技术大讲堂。Part 2：PG源代码安装步骤1创建用户与环境配置步骤2系统内核参数配置步骤3PostgreSQL 安装1、创建用户与环境配置创建用户：# groupadd postgre

从小白到专家 PG 技术大讲堂 - Part 1：PG 简介

34、In your database, you want to ensure that idle sessions that are blocking active are automatically terminated after a specified period of time.How would you accomplish this?A. Setting a metric th

33、choose oneYou are administering a database and you receive a requirement to apply t he following restrictions:1. A connection must be terminated after four unsuccessful login attempts by user.2

32、choose oneA user establishes a connection to a database instance by using an Oracle Net connection. You want to ensure the following:1.The user account must be locked after five unsuccessful logi

31、Choose three.Examine these statements:ALTER SYSTEM SET RESOURCE_LIMIT=FALSE SCOPE=BOTH;System altered.CREATE PROFILE dev_users LIMITSESSIONS_PER_USER 3IDLE_TIME 10FAILED LOGIN ATTEMPTS 3PASSWORD_VE

30、choose oneWhich statement is true about the DEFAULT profile?A) It can be dropped and recreated.B) It must be explicitly assigned to a user.C) The values assigned to the resource limits and password

29、choose oneWhich statement is true about profiles?A) Resource limits specified in a profile assigned to a user are always enabled.B) A profile can be assigned only to one user.C) A user can exist

28、Which four account management capabilities can be configured using Oracle profiles? (Choose four.)A. the number of hours for which an account is locked after the configured number of login atte

Oracle OCP 19c 认证1Z0-082考试题库(第27题)-CUUG内部学员版082题库解析27、Evaluate the following SQL statement:SQL> select cust_id, cust_last_name "Last name"FROM customersWHERE country_id = 10UNIONSELECT cu

26、Which two statements are true about the ORDER BY clause when used with a SQL statement containing a SET operator such as UNION? (Choose two.)A. Column positions must be used in the ORDER BY claus

25、Which three instance situations are possible with the Oracle Database server without multi-tenant?(Choose three.)A. two or more instances on separate servers all associated with one databaseB.

24、Evaluate these commands which execute successfully:CREATE SEQUENCE ord_seqINCREMENT BY 1START WITH 1MAXVALUE 100000CYCLECACHE 5000;CREATE TABLE ord_items(ord_no NUMBER(4) DEFAULT ord_seq.NEXTVALUE

23、Which two statements are true regarding Oracle database space management within blocks managed by Automatic Segment Space Management (ASSM)? (Choose two.)A. PCTFREE defaults to 10% for all bloc

22、Choose threeWhich three are true about dropping columns from a table?A) A column can be removed only if it contains no data.B) A column drop is implidtly committedC) A column that is referenced by

21、Choose threeExamine this description of the PRODUCTS table:Name NULL? TYPE------------------------------------------------------------------------PROD_ID NOT NULL VARCHAR2(6)QUANTITY NUMBER(8,2)PRI

20、choose two:Examine the structure of the DEPARTMENTS tableName Null? Type------------------------DEPARTMENT NOT NULL NUMBER(4)DEPARTMENT_NAME NOT NULL VARCHAR2(30)MANAGER_ID NUMBER(6)LOCATION_ID NUM

19、choose the best answer Evaluate the following SQL statement:ALTER TABLE hr.empSET UNUSED (mgr_id);Which statement is true regarding the effect of the above SQL statement?A) Any views created on the

18、Evaluate the following ALTER TABLEstatement:ALTER TABLE orders SET UNUSED (order_date);Which statement is true?A. After executing the ALTER TABLEcommand, you can add a new column called ORDER_DAT

17. Examine the following command:CREATE TABLE (prod_id number(4),Prod_name varchar2 (20),Category_id number(30),Quantity_on_hand number (3) INVISIBLE);Which three statements are true about using an i