Oracle

DBWR process: This process writes a buffer into a data file. It is an Oracle background process responsible for Buffer Storage zone management. When a buffer in the buffer zone is modified, it is marked as "dirty". The main task of DBWR is to write

When writing scripts, we often use the set statement to set some required format specifications. The following describes the application of several common set statements. SQL> set echo on ----------------- set whether to display the statement when

Sys is the account with the highest permissions in the Oracle database and has the create database permission. system does not have this permission. The role of sys is sysdba, and the role of system is sysoper. The remaining permissions are shared

In 10gR2, oracle simplifies the whole process of stream configuration. In 9iR2 and 10gR1, You need to configure stream capture, propagation, and application processes. It has been encapsulated by the new process

In fact, with the Instant Client, there may be no need to try to create an Oracle Client. Here, I want to explain my reasons: 1. The bug of the Instant Client is much higher than the package of the Oracle Client, which has been found in many

1. The most basic DBMS_OUTPUT.PUT_LINE () method You can use DBMS_OUTPUT.PUT_LINE (output) Wherever you are between BEGIN and END ); However, this may cause a problem, that is, the function can display a maximum of 255 characters at a time,

The oracle listening mechanism is the portal for external applications to connect to oracle. Use the lsnrctl program provided by oracle for management. Generally, when managing oracle, many people tend to ignore the security management of listener:

Although I used to delete repeated records in the previous article, it was not bad, but I encountered a heavyweight large table, and I accidentally thought of a new method. Idea 1. keep records that are not repeated 2. Save a rowid in the record /

To delete an Oracle database in a Linux operating system, you can use the common Oracle method or follow the methods provided in this article to delete all related files.It is relatively easy to delete Oracle on a Linux operating system. Record the

This article will discuss and share with you some common classic queries of oracle SQL. You are welcome to add them. You can also share some classic queries. In this article, if you think there is any better solution to every problem, you are

1. view the EM port of the database instance In the ORACLE_HOMEinstallportlist.ini file. Ii. SID of the database instance The SID length cannot exceed 8 characters. The instance name cannot exceed 30 characters Iii. Common commands Start/Close

Today, I received a confirmation request from the development team. The following three statements have the same execution plan COST, but the actual execution results differ greatly (1) the query speed is very slow, 2) and 3 ).  1)Select *From

  Name Create sequence-CREATE a new serial number generator Syntax Create sequence seqname [INCREMENT increment] [MINVALUE minvalue] [MAXVALUE maxvalue] [START start] [CACHE cache] [CYCLE] Input Seqname Name of the serial number to be

Oracle Database Programming: basic concepts of Oracle databases 1. Basic concepts of Oracle databases: Oracle memory structure: the Oracle memory structure can be divided into the shared memory area and non-shared memory area, the shared memory zone

The problem of multi-field connection between oracle tables is as follows: SELECT * FROM table1 a, table2 B, WHERE a.1 = B .1 AND a.2 = B .2 AND a.3 = B .3 ----------  In the initial stage, Table a contains the three fields in Table B that are

Oracle Autonomous Transactions (Autonomous transaction) Oracle Autonomous TransactionsAutonomous transactions allow you to leave the context of the calling transaction, perform an independant transaction, and return to the calling transaction

When installing The DBMS_SHARED_POOL package, you will encounter an error such as the DBMS_SHARED_POOL package is not executed on The Existing Database when installing the 10g gc, which means that The DBMS_SHARED_POOL package is not installed; the

All scripts of the oracle backup plan are evenly stored in/dsk3/bk/scripts. ① [Oracle @ sia scripts] $ cat connect. rcv (connect to the rman script) connect target sys/oracle @ prod; ② [oracle @ sia scripts] $ cat del_obso.rcv (delete logs with

[Oracle] Data Pump detailed tutorial (5)-command interaction mode [Oracle] Data Pump detailed tutorial (4)-network_link http://www.bkjia.com/database/201308/232536.html After starting a datapump job, you can view the current progress through v $

Error in invoking target 'mkldflags ntcontab. o nnfgt. o' of makefile solves the following error when installing the oracle11g r2 database software: solution: this problem is generally caused by gcc. The following software package is missing after