oracle database 11g sql fundamentals

password management, unlocking the usual Scott account and entering the password. As shown in figure: 14. Unlock Scott account, remove the front green tick, and enter the password. You can also enter the usual short password, do not have to press Oracle recommended 8-bit above the size of the number, trouble. Oh. As shown in figure: Note: Sys/system, while modifying the new password, confirm the password. 15. Similarly, passwords that do not c

of new products. Finally, hardware is evolving, such as the maturing of flash technology, where flash memory can be used as a cache between disk and memory, or a complete replacement for disk. And the memory price is getting lower and bigger, the in-memory cache or database is more and more widely used, which can bring the order of magnitude performance improvement to the application. The IO problems faced by the

In the use of Oracle databases, Backup recovery is the most critical. When the database fails, it can be restored in a timely manner to reduce unnecessary losses. Next I will briefly introduce the import and export of databases, solutions, tables, and the role of things in the Process of use.1. Export data tables[Oracle @ CentOS ~] $ Exp scott/system tables = t f

available RAM and swap space, enter the following command: FreeAutomatic Memory Management Starting with Oracle Database 11g, the Automatic memory Management featurerequires more shared Memory (/DEV/SHM) A nd file descriptors. The size of the sharedmemory must is at least the greater of the Memory_max_target and Memory_targetparameters For each

The following problems are frequently encountered during data migration: 1. If the exported file is not valid, the header verification fails; 2. EXP-00056: Oracle error 6550ORA-06550: Line 1, column 41:PLS-00302: component 'set _ no_outlines 'must be declaredORA-06550: Line 1, column 15:PL/SQL: Statement ignoredEXP-00000: Export termination failed About import and export: 1. The exp command on the clien

I. Overview Performance risks may occur when the SQL Execution Plan of an SQL statement is changed. There are many reasons for changing the SQL plan, such as the Optimized Program version, optimized program statistics, optimized program parameters, solution definition, system design, and SQL profile creation. In earlie

Where can I start learning about Oracle? Here, I will take you to the door of Oracle. One chapter a day, seven days of entry is not a dream. 1. SQL language Overview 1.1 SQL language classification Data Definition Language (DDL) Used to CREATE, modify, and delete database ob

I see a lot of questions on shared file systems the can used when people move from single instance to Oracle RAC Datab ASE and Grid Infrastructure. The most common question are the following: "should I place archive logs in OCFS2 or ASM or ACFS of 11g?" I ' ll try to clarify this topic below.First we need to understand a separation between Oracle

Label:1 Viewing version information for Oracle (1) Connect to the database with the client, execute SELECT * from V$instanceView version Items (2) SELECT * FROM Product_component_version (3) or Query V$version View component-level information 1.1. Oracle parameter Settings 11g data pump export, importEnter the CMD inte

The following error occurred while starting the Oracle 11g RAC database, only one of the nodes could be started, and the other node could not start, possibly due to a previous modification of the Cluster_database parameter. This parameter must be set to true in the Oralc RAC schema. Error message: ora-01102:cannot Mount

Tags: OracleI. 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, 4K, 8K, 16K, 32K, or larger, often referred to as oralce

Bkjia.com exclusive Article]Oracle Database 11gR1 new database replay DBR) function allows Oracle DBA to capture load from an Oracle 10gR2 environment, and then replay this load in Oracle 11gR1 environment, this section analyzes h

Why cannot I enable ADG for Oracle 11g slave database? Today, we have encountered a strange problem, but there is an essential cause and effect behind the strange phenomenon.During an Environment check in the afternoon, it was found that the standby database was in the mount stage. This was a 11gR2

Tags: size reliable moderator large online benefits audit security soft High reliability. The ability to place server failures, site failures, and human errors wherever possible. High security information. Data security and compliance can be ensured with a comprehensive meeting of row-level security, fine-grained auditing, transparent data encryption, and data. Better data management. Easily manage the entire lifecycle of information for the largest