Database Administrator

1. startup nomountNon-installation startup. In this mode, you can execute: re-build the control file and re-build the database.Start the instance, that is, start the SGA and background processes. To start the instance, you only need the init. ora

1. Table space for indexesOralce:Create TABLE T1...Create Index... ON T1... IN INDX_TSDB2:Create TABLE T1... IN DATA_TS index in INDX_TSCreate INDEX... ON T12. RowIDOracle:Oracle has RowID, which is unique in the database and can be obtained in the

Software environment: 1. Windows 2000 + ORACLE 8.1.7 2. ORACLE installation path: C: \ ORACLE Implementation Method: 1. Choose "start"> "Settings"> "Control Panel"> "Administrative Tools"> "services" to stop all Oracle services. 2.

1. Related Concepts The concept of Rowid: rowid is a pseudo column. Since it is a pseudo column, this column is not user-defined, but added by the system itself. Each table has a pseudo rowid column, but the table does not physically store the value

On ArchLinux, we can easily install MySQL. We can use the following command to install: Pacman-Sv mysql Just such a simple command, we can install the latest MySQL database on our system. Of course, we need to do the following work to enable the

1. Preface With the maturity of traditional database technology, the rapid development of computer network technology and the expansion of Application Scope, database applications have been widely established on computer networks. At this time, the

From the perspective of most system application instances, query operations account for the largest proportion in various database operations, and the SELECT statement based on query operations is the most costly statement in SQL statements. For

Oracle databases can run in two modes: archivelog and noarchivelog ). The archive mode can improve the recoverability of Oracle databases. Production Databases should all run in this mode. The Archive mode should be combined with the corresponding

ADO. NET provides all the functions required to process background data, and is as simple as reading a data from a table. Transaction Processing (transaction) allows you to group database operations to ensure that all operations can be performed.

I have been writing PL/SQL code since 1990. This means that I have written tens of thousands of lines of software code, but I am sure that most of the code is very poor and difficult to maintain. Fortunately, it is not too late for me to find and

In this example, you can add, modify, delete, and query data in a table. In this example, the computer software and hardware environment is: Windows NT 4.0 Server, MS-SQL Server7.0, Borland Delphi 5, PIII550, M memory. Of course, normal friends can

Use of Oracle Application Server ApplicationsSec_Manager.Secure_PackageThe routines in the package store private data in encrypted format, if usedSecure_Package.Secure_DataStorage CARD_NO data ). According to the custom encryption package definition

Optimizer for PL/SQL statement execution of ORACLE databases, including cost-based optimizer CBO) and rule-based optimizer RBO ). The RBO optimization method depends on a set of strict syntax rules, as long as the statements written according to the

1. How to analyze LogMinerCurrently, the only way to analyze Oracle logs is to use the LogMiner provided by Oracle. All changes to the Oracle database are recorded in the log, however, we cannot understand the original log information at all, and

PrefaceMost Oracle Database performance problems are caused by unreasonable Database design. Only a small number of problems are rooted in the unreasonable configuration of memory modules such as Database Buffer, Share Pool, and Redo Log Buffer, and

In large databases, Procedure is often called because of development needs. Procedure is different in Oracle and Sqlserver due to different syntaxes, but in debugging, is relatively difficult, especially in some error handling. First, debug:1. for

1. create database database_name [with log in "pathname"] CREATE a DATABASE. Database_name: Database Name. "Pathname": the log file for transaction processing. Create a database_name.dbs directory. The access permission is set by GRANT and cannot be

Informix-SPL (process) syntax Informix database users are generally familiar with using SQL statements for simple queries and statistics, in addition, the database server of Informix-Online provides the Structured Query Language SQL statements and

When OnLine ends abnormally, information about the reason why OnLine is going offline will be written into the log. The following example shows the logon log in the system log when OnLine ends: ProcessAbortedAbnormally: pid = 22500 user = 210us = c00

1. Use the ontape command OnLine dynamic server 7.1 provides an OnLine Incremental Backup Tool for database administrators. When running commands, database administrators can use ontape for data backup and logical log backup. It also provides an