Oracle

List the points of knowledge about OPROCDOPROCD is the introduction of Oracle in RAC to fencing IOUnder UNIX systems, there is a OPROCD process if we do not use third-party cluster software other than OracleUnder the Linux system, the OPROCD process

An execution plan is a series of commands that tell Oracle what access method to use for each Table object and what join and join order to join multiple tables together. Each step in the execution plan produces a row source and then joins with

Http://blog.163.com/[email protected]/blog/static/7156283420100531431855/1. Export data in the first database: qlyg_xs_db_chinatelecom_0910191029.dmp (user is Qlyg_xs)2, the QLYG_XS_DB_CHINATELECOM_0910191029.DMP to the second database on the host3.

At present most of the database has the need of distributed query. The following is a simple introduction to configuring cross-Library access in Oracle.For example, there are 2 database servers and 2 databases are installed. Database Server A and B.

1. Install CRS failure, or perform root.sh error, possible causes:　　(1) Time between nodes is out of sync, workaround: Use NTP service (2) The default firewall is enabled under Linux, resulting in execution of root.sh error: Failure at final check

First, Oracle has an optimizer (Optimizer), and Oracle's optimization mechanism starts with Optimizer. Clear two concepts: there are two ways to optimize Oracle Optimizer, one is rule-based, we call RBO (rule-based optimization), One is the

1 SELECT UPPER(F.tablespace_name) Tablespace name, D.TOT_GROOTTE_MB table space Size (M), D.TOT_GROOTTE_MB-F.total_bytes "used Space (M)", To_char (ROUND((D.TOT_GROOTTE_MB-F.total_bytes)/D.tot_grootte_mb* -,2),'990.99')||'%'"Use ratio (%) ",

Oracle can assign multiple users to a database, users create their own tables, and if they do not want to be assigned to other users, other users cannot see their own created tables.User management:Creating users: Create user Chunxiao identified by 1

What you need to know about OLR in the Oracle 11g GRID1. Check the status of the OLR:[Email protected] ~]# ocrcheck-localStatus of Oracle Local Registry is as follows:Version:3Total Space (Kbytes): 262120Used Space (Kbytes): 2748Available Space

Oracle Job IntroductionThe main use scenarioperiodically perform related operations in the background: save one table's data to another table 0 o'clock every night, 2: Scheduled backup database, etc.curing says everything is difficult at first, here

In the database, you can use the following statement to determine whether the string is in one or more email formats: Select count (1) FROM dual WHERE regexp_like (v_mail, '^ \ w + (-\ w +) | (\. \ w +) * \ @ [A-Za-z0-9] + ((\. |-) [A-Za-z0-9] + )

  SQL> @/tmp/4.txt Create table huang_1 (deptno number, dname varchar2 (19), loc varchar2 (20 )) * ERROR at line 1: ORA-25153: Temporary Tablespace is Empty. The system prompts that the temporary tablespace is empty. Next, let's check the current

Programmers may encounter Oracle url invalid issues when connecting to oracle. The following small series will teach you how to view the Instance name in oracle to help you solve this problem. Oracle displays the instance names in two configuration

Background:On the local machine (Win7 64-bit flagship Edition) Install the Oracle 11g Client32-bit ORACLE clientIf the 64-bit ORACLE client is installed, you cannot enter the sqlplus/nolog command in the CMD command, that is, the command cannot be

-- Delete the student renewal tableDrop table stuStore;-- Create a student renewal tableCreate table stuStore(StuNum number (4), -- Student IDStuClass varchar2 (20), -- CourseStuStores number (3) -- score);-- Insert test data to the student renewal

Zookeeper Replacement command for crsctl in oracle 11g (oracle 10g)Deprecated Command Replacement Commands Crs_stat --- cluster status check Crsctl check cluster-allCrsctl stat res-t Crs_register -- cluster

Oracle? Database Performance Tuning Guide10GRelease 2 (10.2)B14211-03 Home Book List Contents Index Master Index Contact Us

1. TO_CHAR Syntax: TO_CHAR (X [, format]) Converts X to a string in format. X is a date or number, and format is a string that specifies the format used for conversion. Example: SQL> SELECT TO_CHAR (sysdate, 'yyyy-MM-DD hh24: mi: ss') A FROM DUAL; A

You can use bbed to retrieve not only deleted data but also updated data. Of course, the process is more complex than restoring deleted data. The experiment process is as follows: SYS @ ORCL> create table bbed_test (x int, y varchar2 (20 )); Table

If the required archive is lost during the recover datafile process, the recover cannot be performed. You can use the bbed tool to skip the Lost Archive for recover datafile. The experiment process is as follows: SYS @ ORCL> select * from v $