Database Administrator

1. delete a tablespaceDrop tablespace TableSpaceName [including contents [and datafiles]2. delete a userDrop user User_Name CASCADE3. Notes for deleting a tableWhen deleting all data in a TABLE, the truncate table name must be used. Because when the

My work is closely related to Oracle database. I have been engaged in Oracle Development and Management for more than 10 years. I have learned and explored some small experiences in practice, and I will discuss it with you here. ---- 1. having

Oracle provides a large number of index options. Knowing which option to use under a given condition is very important to the performance of an application. A wrong choice may lead to deadlocks, resulting in a sharp drop in database performance or

1. parameter settings during Database InstallationThe following database version is ORACLE 9I (9.2.0). When the database is installed, the database system creates a database instance. The installation directory is \ oracle, enter ora9i for both the

1. Application Development) SQL * Plus E: \ Oracle \ Ora81 \ BIN \ SQLPLUSW. EXE 2. Database Administration) Database Configuration Assistant: Create, configure, and delete Databases DBA Studio integrates multiple database tools into one

The characters below are mainly in lower case based on DB27.X. 1. What are the levels of DB2 products?Enterprise Edition NTERPRISEEDITIONWORKGROUPEDITIONExtended Enterprise version: iseextendeditionPersonal EditionSatellite version of

Single-record functions in SQL 1. ASCIIReturns the decimal number corresponding to the specified character;SQL> select ascii ('A') A, ascii ('A') A, ascii ('0') zero, ascii ('') space from dual; A ZERO SPACE------------------------------------65 97 4

If exists (select * from dbo. sysobjects where id = object_id (n' [dbo]. [GETALL] ') and xtype in (n'fn', n'if', n'tf '))Drop function [dbo]. [GETALL]GO -- Set the volume, actual volume, ground volume, and 0 based on the start time to view the fault

It took one day to successfully install MySQL 5.0.27 icc On Debian Etch Linux and use JDBC to test Chinese! The key to the Chinese problem is that all uses UTF-8 encoding, MySQL 5 release supports UTF-8, but the default is latin1, Java uses all

Bkjia.com exclusive Article] This article introduces the indexes and common index types of SQL Server and Oracle. We hope to deepen our understanding of the two database index applications through the comparison method. 1. Index in SQL Server  An

People tend to fall into a misunderstanding when using SQL, that is, they are too concerned about whether the obtained results are correct, while ignoring the possible performance differences between different implementation methods, this

Sequence(SEQUENCE) is a serial number generator. It can automatically generate serial numbers for rows in the table and generate a set of equal-interval values (in the type of numbers ). Its main purpose is to generate the table's primary key value,

BecauseOracleThere are three methods for database backup, each of which has different recovery features. Therefore, you should integrate database and file system backup, integrated logical backup, and physical backup. I. Backup Policy 1At

When you installed Mysql on the machine for the first time, you can access the database anonymously or enter the database as a root without a password. In addition, if you are an administrator, you need to establish and authorize some users, which

Solve Chinese Character Errors: Method 1:Copy the file to the .. \ Microsoft SQL Server \ MSSQL \ FTDATA \ SQLServer \ Config \ directory. This path is the full-text directory path, which can be viewed in the full-text directory attributes) Method

The following steps demonstrate how to port the master device to a different disk. While executing this task, please refer to SYBASE's related documentation Technical Documents #1324 entitled "Segment Remapping with Load database When Moving a

The following describes the basic concepts of SYBASE database users. I. SQL SERVER registered users and database users We may be confused when we get started with these two concepts, but it will be clear after we understand the structure of sybase

In this article, you will start by adjusting the location of the temporary database, complete the optimization of the temporary database step by step, and learn some methods and rules for optimizing the temporary database and temporary table. Lab

In versions earlier than Oracle9i, you can only control the UNIX memory used by Oracle when starting the database. Oracle provides some INIT. ORA parameters to check the RAM size of the system global area, SGA. Once the database is started, you

Objective: to migrate the system from Oracle to Sybase. Command Overview: C: \ Documents ents and Settings \ newuesr> isql-helpSyntax Error in '-help '.Usage: isql [-B] [-e] [-F] [-p] [-n] [-v] [-X] [-Y] [-Q][-A display_charset] [-A packet_size] [-c