Oracle

Oracle Study--oracle Wait event (3)Db file Parallel readThis is a very misleading wait event, and in fact this wait event is not related to parallel operations such as parallel queries, parallel DML. This event occurs when the database is recovering,

For Oracle databases, when does the Ogg extraction process get data from the database?Reference text:When GoldenGate fetches Data from the Database on Extraction for Oracle (Doc ID 1059583.1)Suitable for:Oracle goldengate-version 4.0.0 and

This article is original, reproduced please indicate the source.Description/U02/GGS/DIRDAT/SB Trail file name created for source extraction process/U02/GGS/DIRDAT/TB is the source transfer process toward the destination, and the trail file name

When we operate on an Oracle database, we sometimes want to manipulate some of the data after we have finished querying the results, and when we click Edit (a lock flag), we are prompted with the error in the above question: These query results are

What is Orabbix? Orabbix is a plug-in designed to monitor Oracle databases for ZABBIX, providing multiple levels of monitoring, including availability and server performance metrics. It provides an effective mechanism for capturing data from many

First look at the encoding of the Oracle databaseSql> SELECT * from nls_database_parameters where parameter = ' nls_characterset ';PARAMETER--------------------VALUE--------------------Nls_charactersetAl32utf8This is derived from props$, which is

The principle of  1 and Dataguard is dataguard by establishing a primary and standby group to establish its reference relationship. Once  standby is created, Dataguard passes the redo of the primary database (PRIMARY) to the standby database and

There are typically several reasons why Oracle databases take up too much hard disk space (for example, Oracle 10.2.0):1. Oracle's installation directory ... \oracle\product\10.2.0\admin\orcl\udump directory, tracking log files occupy a lot of hard

the SYS user and system user Oracle installation automatically generates SYS users and system users (1), sys user is superuser, has the highest privileges, has the SYSDBA role, has the permission to create database, the user's default password is

1. Create a table2. Create a stored procedureValues3. Create a timer job and specify it to be executed once a minuteDeclare numberbegin'job_proc;' TRUNC (sysdate, 'mi') + 1/(24*60)'end 4. Test View Table Data5. Stop TimerRight-click Edit to

Sqlplus:error while loading shared libraries:/u01/app/oracle/product/11.2.0/dbhome_1/lib/libclntsh.so.11.1:cannot Restore segment prot after Reloc:permission deniedCause: When you configured Linux before installing Oracle, you forgot that SELinux

1 Utl_file Package IntroductionOracle's Utl_file package is used to implement I/O operations on disk files.(1) The previous version of oracle10g needs to specify the directory that the Utl_file package can manipulate.Method:1, alter system set

First, the conceptA tablespace is a logical part of a database.Physically, the database data is stored in the data file;Logically, the database data is stored in a table space, and the tablespace consists of one or more data files.Second, the

Oracle creates sequences, deletes sequences, gets sequencesSequence creation create sequence Seq_newsid increment by 1 start with 1 maxvalue 999999999; Get sequence SQL statement select Seq_newsid.nextval from Sy s.dual; Delete a sequence of SQL

Data loss by date, minute, and second during oracle Storage Today, a developer called me and said that there was a strange phenomenon. In the stored procedure, values of the date type are lost in minutes, minutes, And seconds. Here is an experiment:

When the actual oracle value exceeds the specified length of a database field, an error is reported. oracle Length ORA-01438: value larger than specified precision allowed for this column The length of the actual value is greater than the maximum

Oralce archive log enabling and disabling example, oralce Archive Check whether the oracle database is in archive ModeSQL> select name, log_mode from V $ database; NAME LOG_MODE------------------------------------------TEST NOARCHIVELOG SQL> archive

OracleDBA user management, oracledba user management I would like to share with you the management of users in Oracle. The following are my Oracle learning notes stored on the database. I will share them with you today. For more information, see the

Dba_hist_ SQL _plan is an important view for querying the execution plan of oraclesql. I would like to express my gratitude for the help of elders who have prepared this article. The applicable oracle database version is oracle 10 Gb or later. This

How to obtain the variable value bound to an oraclesql statement When diagnosing SQL Performance problems, we sometimes need to obtain the actual value of the variable it binds, and then bring the actual value into the SQL statement, use the