Oracle

Problem Description:1. Prompt in em openHttps://localhost:1158/em/console/database/instance/repDown?target=orclweng&type=oracle_databaseOra-12505:tns: The listener currently does not recognize the SID given in the connection descriptor (DBD

--SQL Call SELECT * FROM table (Get_airway_subpoint (x,x,x))/////////////////////////////////////////////////////////////////////Method One, with the cursor implementation, namely provided, there is no subsequent scenario two good, can not use the

1. Physical bad blocks and logical bad blocksThere is a concept in the database called data block consistency, Oracle's data block consistency includes two levels: physical consistency and logical consistency, if a data block at these two levels of

I. Oracle database structure1. Logical Structure1.1. Data Block (Orale block): A certain number of bytes of disk space in the operating system's storage system. The data block is the smallest logical part of the Oracle database. can be defined as 2K,

Using shell scripts to monitor and manage Oracle databases will greatly simplify the workload of DBAs, such as common monitoring of instances, monitoring of monitors, monitoring of alarm logs, backup of databases, automatic mailing of AWR report,

1.1trunc function handles numbersThe TRUNC function returns the processed value, and its working mechanism is very similar to the round function, except that the function does not make the corresponding rounding selection processing of the specified

Pro*c is a high-level usage, and OCI is the basic use of OracleHow to compile a. pc file: proc code=cpp parse=none iname=filename.pc oname=filename.cppFirst, I want to cover the header file #include this header fileSecondly, we must define the

If you can log in to any of the users, you can use the method to know which users are currently available.SELECT distinct owner from All_objects to view the current user.If you don't set a password when you install it,Oracle has three default user

A function was created in Oracle that originally wanted to return an index table without success. Think of text can also transfer information, suddenly came to the inspiration, the return value to set the text format.Given that the amount of return

The decode () function is one of the most powerful functions of Oracle PL/SQL and is currently available only to Oracle Corporation, where SQL implementations of other database vendors do not yet have this function.Tools/Materials •

Oracle Version: Oracle 11g1 . Determine your Linux version: [[Email protected] ~] #uname-R 2.6.32-431.el6.x86_64 2.6.32-431.el6.x86_64, which is Linux 62, installation oracleasm Kernel: [email protected] ~]# Yum

Oracle Role Management　First, what is the roleRole: A role is a set of permissions that assigns a role to a user who has all the permissions in the role.Second, the system pre-defined role 　　Predefined roles are some of the most commonly used roles

Rman Backup command Backup Database format= '/home/oracle/backup/bak_full_%u_%t ' tag= ' bak_full ';SQL ' alter system archive log current ';Backup Archivelog all tag= ' Arc_bak ' format= '/home/oracle/backup/arch_%u_%t ' delete

Directory Directory Objective Oracle's architecture Oracle RDBMS Frame composition Storage structure Physical Structure Data Files Redo Log Files Control Files

Autonomous transactionsAutonomous transactions are independent transactional operations, and if a transaction rollback is considered, a single trigger must be written to complete theA transaction A is called within another transaction B, and that

5.oracle dump understanding five data block theoryWelcome reprint, Reprint please indicate source: http://blog.csdn.net/notbaron/article/details/51228514The first two articles describe what we see at the operational level, but without theoretical

Emc data domain 2200 filesys destroy (DATA clearing and Reconstruction), filesys EMC data clearing 1. Data clearing All objects in the file system will be cleared here, including tapes. Sysadmin @ FSEMC01 # filesys destroyThe "filesys destroy"

Common commands and functions of Oracle SQL * plus, oracleplus Common commands: Connect to sqlplusRun cmd in the command line to enter. For example, to log on in sys mode, the command is as follows:(1). sqlplus "sys/zhb126 as sysdba" (2).

ORACLE displays SQL statements with multiple execution plans, oraclesql In the SQL optimization process, you sometimes need to check which sqls have Multiple execution Plans (Multiple Executions Plans for the same SQL statement ), because the same

Routine maintenance and troubleshooting of Oracle 11G R2 slave uard 1. for the Forced Logging mode, there are some DDL statements that can avoid writing redo logs by specifying the NOLOGGING clause (the purpose is to increase the speed, which is