Oracle

With Oracle's standby technology, a single-instance database can be upgraded to a RAC database. This approach can effectively reduce the downtime for single instance migration to the RAC environment. This article describes the errors encountered

Case 1--restores a table in the past at some point in time 1, based on the point of time Sql> Select Username,scn,timestamp,sql_redo from v$logmnr_contents where seg_name= ' TB01 '; USERNAME SCN TIMESTAMP Sql_redo --------------- ---------- -----

Oracle databases, as a product of managing data, must be able to recognize the administrative commands (often called SQL statements) submitted by the user to respond. The process of recognizing is called the process of parsing an SQL statement, and

An Oracle stored procedure consists of three parts: a procedure declaration, a procedure part, and a stored procedure exception. Oracle stored procedures can have parameter-free stored procedures and parameter-stored procedures. Procedure syntax

Branch of the database performance problems, help to help diagnose. The database is a Oracle10.2.0.3 RAC environment, but is now in a single node working state. The current problem is that page access is slow and no further information is available.

A function is a subroutine that evaluates the result value, except that the function has a return clause, and the other structure is similar to the procedure. It is worth noting that functions in Oracle must provide a return value, and if you define

№ 1: The current date is the week ordinal of this month Sql> Select To_char (sysdate, ' YYYYMMDD W HH24:MI:SS ') from dual; To_char (sysdate, ' YY-------------------20030327 4 18:16:09 Sql> Select To_char (sysdate, ' W ') from dual; T-4 № 2:

In Oracle 9i, data can be easily exported to a file or imported from a file. With Oracle's Management Server (Oracle Management Server,oms) can be easily implemented, there are many places to explain the entire operation, but the complete guidance

I do not know how to debug a stored procedure when I write it. One way to debug this is to print out the value of a variable in a program that I print on the console in Java. Here's how to do this from the Sqlplus. 1, execute "set serveroptput on"

Software Environment: 1. Operating system: Windows Server 2. Database: Oracle 8i R2 (8.1.7) for NT Enterprise Edition 3, Installation path: C:\ORACLE Implementation method: 1, D:\>set Nls_lang=american_america. USACII7 Or D:\>set

Summary: In this paper, an Oracle Job task exception case diagnosis, analysis of its causes and the resolution process, from the internal disclosure of Oracle job scheduling and internal timing mechanism. Problems and environment It was reported

Running databases on the Internet often has the need to unify database applications across the country, and a node's data changes are reflected not only locally but also remotely. Replication technology provides users with a quick way to access

It is believed that a large number of system administrators are doing the same job every day-backing up the data. Once a day of negligence, and this day the system is precisely the fault, the need for data recovery, then there is nothing at this

A bad chunk of what is a database First of all, let's take a look at the format and structure of the database blocks--the data blocks of the database have a fixed format and structure, three-layer cache layer,transaction Layer,data layer. When we

　　 Create procedure procedue_name　　[@parameter data_type][output]　　[with]{recompile|encryption}　　as　　sql_statement Explanation Output: Indicates that this parameter is available for return. with {recompile|encryption} Recompile: means recompiling

Oracle can be equipped with more than one database, and only need to open a listener on it, for multiple databases as long as the appropriate service name can be configured to connect. I'm using Oracle 8.1.7 Enterprise edition,os is Windows Server,

1. According to Q193893, we need to build two views within Oracle. Information about using Oracle with Microsoft Transaction Server and COM + components http://support.microsoft.com/?id=193893 Based on our past experience, we can try to run

The primary role of the Sys_connect_by_path function is to distinguish all child nodes under a parent node from a single character, and then connect to a column to display select level ,sys_connect_by_path( id , '/' ) from test start with pid= 1

As an Oracle database administrator, you will encounter such database management requirements, stopping or opening constraints and triggers for all tables under the current user (schema). This is one of the things you need to do when merging

Spool is a control command provided by Oracle Sqlplus. You can use the combination of spool and SELECT statements to dynamically generate some SQL scripts or some data. There are probably two types of statement classifications that can be executed