Database Administrator

Oracle 11g Database shutdown causes the crsd process of 10g Database to restart The customer has an Oracle 10 Gb RAC environment. Due to an occasional demand, a database of 11 GB needs to be temporarily started. When we mount the software and

When the mysql PRIMARY key is set to auto_increment, the PRIMARY key repeat Duplicate entry 'xxx' for key 'Primary ', duplicateentry occurs during the concurrent performance test. When the mysql PRIMARY key is set to auto_increment, the PRIMARY key

Different databases: oracle mysql SQL Server DB2 infomix sybase paging query statement, infomixsybase Paging query statements used in different databases: Current page: currentpagePage size: pagesize 1. Oracle Database Select * from (select A. *,

I found a on the internet, and I think this book is quite good. It is suitable for programmers who are new to Oracle to read it. This book starts with some of the most basic knowledge and works with easy-to-understand examples to help you get

[Introduction to Data Mining]-Introduction to Data MiningIntroduction to Data Mining Reading NotesPrerequisites for data mining: rapid advances in data collection and storage technologies. Data Mining is a technology that combines traditional data

SQL Optimization-count, table join sequence, conditional order, in, exist, countexist 1. About count I have read some articles about count (*) and count (Column). Is the efficiency of count (column) higher than that of count? In fact, I personally

Java uses JDBC to connect to any type of Database (mysql oracle ..), Oraclejdbc Package cn. liz. test; import java. io. inputStream; import java. SQL. connection; import java. SQL. driver; import java. SQL. SQLException; import java. util.

Introduction to the long raw blob clob type in Oracle, blobclob Note: RAW: unprocessed type, which can store binary data or byte charactersLONG: variable-length string data. The maximum length is 2 GB. LONG has the VARCHAR2 column feature. It can

1 PreparationCentOS-6.5-x86_64-bin-DVD1Linux_11gR2_database_1of2Linux_11gr2_database204 F2VMware Workstation 10.0.2SSH Secure Shell ClientInstantclient_11_2Plsqldev10052. Install virtual machines and CentOS(1) install VMware Workstation(2) install

Recently, all the company's operating systems have been upgraded to Windows 7. Our company has an ORACLE product software for Engineering Planning called Primavera Six (P6). So I need to migrate the P6 database from XP to the Win7 system. This is

Abstract: The database is the foundation of the system. If you need to change the fields of the database frequently, or even modify the table and table relationship, I believe that no one will be able to cope with it several times! Because of the

Now, when talking about free databases, most people may first think of MySQL. Indeed, MySQL has been applied in many domestic fields, especially in website setup. However, PostgreSQL is actually the most powerful, rich, and complex free database.

To be continued ...... To be continued ...... To be continued ...... To be continued ...... Col tablespace_name for a15Col segment_name for a15Col segment_type for a15 Select segment_name, segment_type, tablespace_name, extents, bytes/1024 KB from

The alarm logs sent by netizens are originally about a deadlock. Another problem is that the logs written from the redo log buffer to the redo log file cannot be allocated with new logs, private strand flush not complete wait event. This is a redo

Yahoo open-source MySQL Performance Analysis Tool (MySQL Performance Analyzer ), Address: https://github.com/yahoo/mysql_perf_analyzerMySQL Performance Analyzer is an open source project for MySQL performance monitoring and analysis. This repository

Five tips for Instagram to improve PostgreSQL performance, postgresql Performance Optimization As Instagram grows, Postgres continues to serve as a solid foundation for Instagram and stores a vast majority of user data. Less than a year ago, we also

MySQL auto_increment gap problem, mysqlautoincrement Link to this book (http://www.jianshu.com/p/cca59b515e20) We often use the auto_increment field in MySQL, especially the innodb engine. I also often use it. I only know that mysql can ensure

IBM DB2 Data Warehouse Edition is a set of products that combine the strengths of DB2 Data servers and the robust business intelligence infrastructure from IBM. DB2 DWE integrates Core Components for warehouse management, data conversion, data

SQL server, db2, oracle Stored Procedure dynamic SQL statement example, db2oracle Oracle Create or replace procedure a_testAS t_ SQL VARCHAR2 (2000); t_a VARCHAR2 (20); t_ B VARCHAR2 (20); t_c VARCHAR2 (20); t_d VARCHAR2 (20); BEGIN t_c: = 'F'; t_d:

When creating an Oracle database, you should see this option in the database creation assistant wizard, which is the connection mode of the database. In Oracle9i or 10g, we can see two connection modes: a dedicated server connection (dedicated