Oracle

Schema-level replication can be done through DBMS_STREAMS_ADM. Maintain_schemas created, after the space-level trial of the previous table, the creation of a schema-level replication environment is relatively straightforward. The examples in this

1, the creation of the syntax of the index: CREATE UNIUQE | BITMAP INDEX . On . ( | ASC | DESC, | ASC | DESC,...) Tablespace STORAGE LOGGING | Nologging COMPUTE STATISTICS nocompress | Compress Nosort | REVERSE PARTITION | GLOBAL

Having been concerned about SSIS performance issues with SQL Server 2005, one of my fellow testers tested it for reference. There is a part of the project data migration work, frankly, from the old system to switch data in the new system model, the

1, the concept of temporary table Temporary table (Global temporary table): Online shopping for e-commerce Temporary tables are used to store private data for a session or transaction. Once a temporary table is established, its structure persists,

The Oracle tutorial you are looking at is an overview of Oracle Portal and its portal development. Absrtact: Portal is a new technology in it field, it is one of the development direction of enterprise informatization work. This paper first

1. Start case without loading database You can start a case without loading the database, typically before the database is created:STARTUP Nomount2. Start the case and mount the database The user can start the case and mount the database without

Note:The prerequisite for ① recovery is that the backup is done② Full Recovery database is the database encountered a failure, at the time of recovery did not lose any of the submitted things data recoveryIncomplete recovery database is a database

One, query a field repeat Copy Code code as follows: SELECT * From User u where U.user_name in (select U.user_name From User u GROUP BY U.user_name has count (*) > 1) Two, delete the duplicate of a few fields in the

RMAN replication and the same machine copy operation procedures are the same, the difference is that we need to copy the backup files to the secondary library Experimental platform: REDHAT Linux 4.7 + Oracle 10g Target Library Information: Oracle_

In Oracle, for a committed SQL statement, there are two alternative parsing processes, one called hard parsing and one called soft parsing. A hard parsing requires many steps, such as parsing, developing execution paths, and optimizing access plans.

And_equal is a specific operation supported by Oracle that can combine multiple Single-column indexes (index merge) to output query results. At the same time and_equal can be enforced by hints, with a minimum of two indexes specified, up to 5. The

Summary: This article describes how to use PHP's database access technology to implement the storage of Oracle LOB data objects. Keywords: php;oracle; LOB; storage; Introduction PHP, or "Php:hypertext preprocessor", is a versatile scripting

First, Latch description 1.1 Latch Latch belongs to System lock, which is used to protect a serial locking mechanism of shared data structures in the SGA area. Latch implementations are related to the operating system, especially if a process

In large commercial applications, the data disaster recovery backup is very important and necessary. Based on his own practical experience, the author designs a set of simple data automatic backup scheme, which can be used for reference by database

Oracle's 11GR2 version does not make much of a change to the data pump, mainly by adding support for the original version parameters and removing some small restrictions. This article introduces the data pump to import the new data_options

Case 4:recover DataFile --New table space, no backup, datafile deleted Recovery steps: From the library, through the v$recover_file to see the files that need to be recovered, because there is no backup, only the data file offline, data file

Query initialization parameters A lot of ways, such as show PARAMETER, or query V$parameter, here a brief summary. This article briefly introduces a variety of query initialization parameters methods. There are a number of ways to initialize the

Today, a development library can not start, sent over an error to see the log file is damaged (see), and then said the cause and the cause. Said the server was out of power and then did not start up again. Today someone used to think about dealing

Exception:The exception is a feature that is provided by the programming language to enhance the robustness and fault tolerance of the program.Exceptions are divided into:System exceptionsCustom exceptionsSystem exceptions are divided

Recently summarized the database paging SQL normally used in the project. You can post more efficient SQL statements with paging. SQL Server paging     First Paging method   required parameter:    pagesize How many data   per page;   PageNumber