Database Administrator

Problem: the Instance name is o8161 and o8151 when two sets of databases are in the same fashion on one machine. Two listener instances cannot be started at the same time,An error is displayed when the second listener is started. $ Lsnrctl

Often in the data to retrieve the data occurred in the last month, so the use of the following statement select * from eventtable where eventdate> sysdate-30, when the amount of data is small can not see, if there is a large amount of data, you will

Install software using Oracle Universal Installer (OUI)You can use Oracle Universal Installer (OUI) to install your Oracle software. OUI is a GUI tool that allows you to view the Oracle software installed on your machine, install new Oracle software,

Create a button with an icon1. Create a Button2. Set the Iconic attribute of the Button to true. The Icon Name to be added in the Icon Name must not be suffixed with. ico or the path of the I con.3. Set the Icon pathModify Oracle. INI file, find "TK2

Install RedHat Advanced Server I have always installed the RedHat Advanced Server with the minimum installation, and then installed the necessary development environment and X11 components. This saves a lot of space (RHEL3 is installed at a minimum

The select command or statement is used to obtain record information in one or more tables. It is generally used with the where clause to obtain records that meet certain conditions. If there is no where clause, all records are returned. The general

1. Install Fedora22. Download Oralce10G (www.oracle.com.pdf, general installation only needs to download ship.db.cpio.gz3. Unlock [Oracle @ oar10g oracle] $ cd/tmp[Oracle @ oar10g oracle] $ gzip-cd ship.db.cpio.gz | cpio-idmv 4. Modify Linux system

Getting started Let's take a simple example to help you understand how to read the query plan. You can run the SET SHOWPLAN_TEXT On command, you can also set the same options in the configuration attributes of SQL Query Analyzer to get the Query

What is the Oracle character set? The Oracle character set is a collection of symbols for interpretation of byte data. It has different sizes and an inclusive relationship. Oracle supports the national language architecture, allowing you to store,

Create SPFILE By default, ORACLE uses PFILE to start the database. SPFILE must be created by PFILE. The newly created SPFILE will take effect the next time the database is started. create spfile requires SYSDBA or SYSOPER permissions: Create spfile [

If you cannot back up a MySQL or PostgreSQL database every day, you should back up the database once a week. For many enterprises, database information represents the website content and other important data. Therefore, it is very important to

ORACLE Database is the most widely used database in today's field. It is also a huge system. It requires not only some theoretical knowledge, but also development and engineering experience to fully understand it. I am an ORACLE enthusiast. I hope

The so-called data transmission actually refers to the Access between SQL Server and Excel. Why should we take this issue into consideration? Due to historical reasons, many of the customer's previous data is stored in the textDatabase, Such as

Syntax oninit [-s] [-I] [-p] [-y] Oninit changes the system from off-line mode to on-line modeOninit-s changes the system from off-line mode to quiescent ModeOninit-I initialization systemOninit-p does not search when the shared memory is

Onstat-D INFORMIX-OnLineVersion7.22.UC1 -- On-Line -- Up00: 00: 38 -- 423064 KbytesDbspacesAddressnumberflagsfchunknchunksflagsownernameAd5c100 1 111 NinformixrootdbsAd5dc282 121 Ninformixdbs7Ad5dc983 131 Ninformixdbs83 active, 2047

Relational Database Informix-4GL Program Design 1. Key and methods for designing relational database programs 1. Key factors for successfully designing a relational database:①. Gain an in-depth understanding of internal organizations and needs of

I. OEM Architecture Currently, Oracle Enterprise Manager (EM) Version 2.2 is used to implement a three-layer structure. Its composition is as follows: The first layer is client tools, such as EM Console, DBA Management Pack and other integrated

Oracle recovery management (RMAN) has many features that can be used to help Backup and Restore processes. The tool has command line and GUI versions. Oracle recovery management (RMAN) has many features that can be used to help Backup and Restore

Use Excel 12 to manage external database connections Microsoft has made a series of breakthroughs in "connection management" in Excel 12 workbooks. Specifically, three new features can be implemented in workbooks connected to external data, whether

Changing the archive mode in rac is not as easy as changing the archive mode in standalone or master/backup mode, mainly because of the cluster_database parameter. By changing the ter_database parameter from true to false, You can smoothly change