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关于关键词 的检测结果,共 9708
unix_5359 | 2019-11-14 13:26:48 | 阅读(1320) | 评论(0)
Which two statements are true about the DUAL table?B) It can be accessed only by the SYS user.D) It can display multiple rows but only a single column.F) It can be used to display only constants or pseudo columns.(解析:dual 这个虚拟的表可以显示多行多列;任何用户都可以访问它。这道题...【阅读全文】
unix_5359 | 2019-11-06 10:08:36 | 阅读(750) | 评论(0)
Which three statements are true about GLOBAL TEMPORARY TABLES?B) A GLOBAL TEMPORARY TABLE can have multiple indexesD) Data Manipulation Language (DML) on GLOBAL TEMPORARY TABLES generates no REDO.F) A tigger can be created on a GLOBAL TEMPORARY TABLE(解析:全局临时表跟普通表一样,...【阅读全文】
unix_5359 | 2019-11-04 10:49:06 | 阅读(680) | 评论(0)
Which two statements are true about transactions in the Oracle Database serve?B) Data Manipulation Language (DML) statements always start a new transaction.D) A Data Detiniton Language (DDL) statement does a commit automatially only for the data dictionary updates caused by the DDLF) I...【阅读全文】
unix_5359 | 2019-11-04 10:18:09 | 阅读(860) | 评论(0)
In the PROMOTIONS table, the PROMO_BEGTN_DATE columm is of datatype DATE and the default date format is DD-MON-RR.A) TO_NUMBER(PROMO_ BEGIN_DATE) - 5 will return numberC) PROMO_BEGIN_DATE - SYSDATE will return a number.E) PROMO_BEGIN_DATE - SYSDATE will return an error.(解析:这道...【阅读全文】
unix_5359 | 2019-10-25 14:59:53 | 阅读(900) | 评论(0)
Examine this partial command:cust_id NUMBER(2),)Which two clauses are required for this command to execute successfully?B) the REJECT LIMIT clauseD) the ACCESS PARAMETERS clauseAnswer:AD【阅读全文】
unix_5359 | 2019-10-25 14:13:42 | 阅读(770) | 评论(0)
Examine the description of the PRODUCTS table:-----------------------------------------------------------------PRODUCT_NANE                     VARCHAR2(10)PURCHARGE                  &nb...【阅读全文】
unix_5359 | 2019-10-21 11:39:52 | 阅读(850) | 评论(0)
Which three statements are true about dropping and unused columns in an Oracle database?B) A DROP COLUMN command can be rolled backD) An UNUSED column's space is redaimed automatially when the row containing that column is next queried.F) A column that is set to NNUSED still counts tow...【阅读全文】
unix_5359 | 2019-10-21 10:25:04 | 阅读(650) | 评论(0)
Which two statements are true about a self join?B) It can be a left outer join.D) It can be an inner join.Answer:BD不过在进行内连接时为了区别表的名字,需要加别名from emp2 won w.mgr=m.empno;)【阅读全文】
unix_5359 | 2019-10-18 14:51:08 | 阅读(1040) | 评论(0)
Which two statements are true about Oracle synonyms?B) All private synonym names must be unique in the database.D) A synonym can be created on an object in a package.(解析:同义词也是 Oracle 的一个对象;【阅读全文】
unix_5359 | 2019-10-18 09:36:29 | 阅读(660) | 评论(0)
Which three statements are true about views in an Orade batabase?B) Rows inserted into a table using a view are retained in the table if the view is doppedD) Views have no segment.F) A view can be created that refers to a non-existent table in its defining query.(解析:...【阅读全文】
unix_5359 | 2019-10-17 11:49:07 | 阅读(630) | 评论(0)
The EMPLOYEES table contains columns EMP_ID of data type NUMBER and HIRE_DATE of data type DATEThe NLS_TERRITORY parameter is set to AMERICA in the session and, therefore, Sunday is the first day ofthe weekA) SELECT emp_id,NEXT_DAY(ADD_MONTHS(hite_date,6), 'MONDAY') FROM employees;C) S...【阅读全文】
unix_5359 | 2019-10-17 09:52:27 | 阅读(620) | 评论(0)
Which three are true about granting object privileges on tables, views, and sequences?B) DELETE can be granted on tables, views, and sequences.D) INSERT can be granted on tables, vews, and sequences.F) ALTER can be granted only on tables and sequences.(解析:update 和 delete 只能在...【阅读全文】
unix_5359 | 2019-10-15 10:03:24 | 阅读(640) | 评论(0)
Exammine the desciption of the PRODUCT DETALS table:--------------------------------------------------PRODUCT_NAME  NOT NULL  VARCHAR2(25)EXPIRY_DATE  DATEA) PRODUCT_ID can be assigned the PEIMARY KEY constraint.C) EXPIRY_DATE contains the SYSDATE by defalt if no...【阅读全文】
Frank_China | 2019-10-09 09:14:39 | 阅读(4860) | 评论(0)
【Oracle】 关于oraclejob
a943981045 | 2019-09-24 11:00:36 | 阅读(1810) | 评论(0)
oracle 在schedule这个新功能出现以前,定时任务都是靠dbms_jobs这个包来创建job实现的,作为DBA来说也会经常根据dba_jobs视图来查一些job相关信息,那关于dbms_jobs里边的几个时间不知大家是否有关注?通过以下job的测试:create or replace procedure pro_job_printasbegindbms_output.put_line('系统时间:' || to_...【阅读全文】
Frank_China | 2019-09-19 16:35:43 | 阅读(9820) | 评论(0)
--1、查看表空间的名称及大小 SELECT t.tablespace_name, round(SUM(bytes / (1024 * 1024)), 0) ts_size FROM dba_tablespaces t, dba_data_files d WHERE t.tablespace_name = d.tablespace_name GROUP BY t.tablespace_name; --2、查看表空间物理文件的名称及大小 SELECT tablespace_name...【阅读全文】
Frank_China | 2019-09-19 16:09:58 | 阅读(1950) | 评论(0)
查看日志文件组状态信息 select group#,status from v$log; inactive:非活动状态 current:当前正在被使用 active:活动的非当前日志,该日志可能已经完成归档,也可能没有归档,活动的日志文件在crash恢复时会被用到 unused:日志从未被使用 上图表名数据库正在使用日志文件组3...【阅读全文】
hxl | 2019-08-19 09:56:32 | 阅读(0) | 评论(0)
GGSCI (localhost.localdomain as c##goldengate@ora12c/CDB$ROOT) 59> dblogin userid c##goldengate, password goldengateSuccessfully logged into database CDB$ROOT.GGSCI (localhost.localdomain as c##goldengate@ora12c/CDB$ROOT) 60> register extract ext database container (ora12cpdb1)2019-08-19 09:4...【阅读全文】
dbwatcher | 2019-07-15 16:37:43 | 阅读(6890) | 评论(1)
博客文章除注明转载外,均为原创。转载请注明出处。count(*)对行的所有数目进行计算,包含NULL值的行。count(column)对特定的列的值具有的行数进行计算,不包含NULL值的行。count(1)的结果和count(*)的结果是一样的。小例子:sys@orcl-192.168.0.21> select count(*) from v$session;  COUNT(*)----------&...【阅读全文】
dbwatcher | 2019-07-11 14:16:33 | 阅读(3720) | 评论(0)
博客文章除注明转载外,均为原创。转载请注明出处。本文链接地址:http://blog.chinaunix.net/uid-31396856-id-5823132.html开发反馈业务数据有问题,因此登录ogg检查发现ogg的复制进程abended状态。step1、ogg状态检查发现REP_BIG进程状态ABENDEDstep2、检查进程的错误日志view report REP_BIG检查后发现日志中错...【阅读全文】