Database Administrator

Oracle's system is too huge. For Beginners, it is inevitable that they will not start to feel like they want to learn anything, and the results will not be good. So share their learning experience, we hope that the beginners will have a general

I. ProblemsWhen using the sqlcmd client tool to connect to data, the following error occurs:C: \> sqlcmdHResult 0x2, level 16, status 1Named pipeline provider: connection to SQL Server cannot be opened [2].Sqlcmd: Error: Microsoft SQL Native Client:

When interviewing MySQL DBA or those who intend to optimize MySQL performance, my favorite question is: what adjustments should I make after the MySQL server is installed according to the default settings?I was surprised how many people could not

After Apache + MySQL + PHP is installed in linux, phpMyAdmin is an excellent database management software. 1. Extract // Because the current server software is installed under/opt/, which are/opt/apache,/opt/mysql,/opt/php, therefore, the root

1. Oracle Database NameThe database name is the "ID number" of the database, used to identify a database. DB_NAME is used in the parameter file.The database name must be used to install the database, create a new database, create a database control

Install MySQL in Ubuntu Sudo apt-get install mysql-server This should be very simple, and I don't think there is much problem with the installation, so I will not talk about it much. Let's talk about the configuration below. Configure MySQL Note: In

It may be a little difficult to install mysql on Unix/Linux. the operating system I use is FreeBSD5.2.1. If other operating systems may have different installation methods, handle them as appropriate.I won't talk about installing FreeBSD. I just

RedHat Linux 9.0 is a very good Linux release version with good Chinese support and rich application software, so that many Linux users, including the author, can't help it. However, due to the high GCC version used by Redhat9.0, some compatibility

After mysql is installed in Ubuntu 7.10, the password of the root account is blank and you can log on as follows: Mysql-u root Here we need to set mysql security. Set the password of the mysql root User. Use mysqladmin to set the password

I want to develop a database on the Ubuntu7.10 platform. I saw on the Ubuntu Forum that mysql installation was quite simple, so I chose mysql. I did not expect that I had spent two days on this simple problem. It seems that the simplicity of things

Is NULL the same as zero? Of course not. Null indicates that it does not exist or is not sure. 0 indicates no.In the development of the application Hibernate, a problem occurs: a field in the Oracle database (Number type) has no value (that is, NULL)

Today, we found that the impdp command has a special purpose. You can migrate one user of the database to the user of the database on another machine. If the target user does not exist, you can create the user accordingly. The command format is as

When the monitoring software cacti is installed, mysql cannot create a database Mysql> create database cacti; ERROR 1044 (42000): Access denied for user ''@ 'localhost' to database 'cacti' The root user's create_priv permission problem is solved

Today, outln disappeared for no reason, and no information was deleted from the alter log in the background. Cannot be created again Create user outln identified by outln * ERROR at line 1: ORA-00604: error occurred at recursive SQL level 1 ORA-18008

Hello everyone! Today, we have compiled examples of how to create 10g 11g all partition tables. Here we will share with you: Partitions supported by 1.1 9i, 10g, 11gR1, and 11gR2 Interval list hash Interval 11gR1 9iR2 9iR2   List 11gR1 11gR1 11gR1  

Let's take a look at the two sections in the Oracle official document: (1) Can I change the public hostname in my Oracle Database 10g Cluster using Oracle Clusterware? Hostname changes are not supported in Oracle Clusterware (CRS), unless you want

It is an important feature to determine whether a DBMS is powerful and whether external stored procedures are easy to create and use. The ASA database has long been supporting the use of C, CLR (. NET), java and other programming languages to create

Oracle logs include online redo log and archived log. Online redo log:A database must have at least two groups of redo logs, and each group of redo logs must have at least one member (for security reasons, we recommend that each group of redo logs

Oracle index file migration steps: Preparations:1) Back up GBOS User table indexes: Use plsqlDevelop to export all GBOS User table indexes for backup.  1. view the data files in the index tablespaceSelect file_id, file_name, tablespace_name, bytes/10

Oracle databases are favored by more and more enterprises for their high reliability, security, and compatibility. Many database administrators are concerned about how to maintain excellent performance of Oracle databases. Based on my experience, we