Database Administrator

Because of the company's project requirements, the database is imported and exported between two databases. I have studied SQL Server Import and Export and found that some articles are more comprehensive. Now I want to correct them for your

Nowadays, 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 for Oracle databases. I suggest you

Password Complexity is an important aspect for IT auditors to check whether a system is secure. IT policies often point out that the password should have a minimum length and contain a mix of uppercase letters, lowercase letters, numbers, and

Log On As an Oracle user.1. Unzip the 9206 patch installation package$ Unzip p3948480_9206_solaris64.zip2. Set the environment variables ORACLE_HOME and ORACLE_SID.$ ORACLE_HOME =/opt/oracle/db01/app/oracle/product/9.2.0$ ORACLE_SID = ORCL$ Export

Now there is a Linux server with Oracle installed on it. We want to use the conn/as sysdba statement to log on to the database and manage the database. However, there is always an error, the error such as Service Name cannot be found. What is the

The procedure is as follows:Software environment:1. Windows 2000 + Oracle 8.1.62. ORACLE installation path: C: \ ORANTImplementation Method:You can use the following statement:Select user_name, SQL _textFrom v $ open_cursorWhere sid in (select sid

Starting remote services with the root user has always been a security taboo, because if the service program encounters problems, remote attackers are very likely to gain full control of the host. MySQL has made minor changes since version 3.23.15.

Steps 1-7 below are for the root user 1. hardware environment requirements Check content Minimum value Check command reference Physical memory 512 M # Grep MemTotal/proc/meminfo Swap space 1.0 GB or 2 times memory size # Grep SwapTotal/proc/meminfo /

Install MySQL in CentOS5Create a mysql user group and user[Root @ centos] # groupadd mysql[Root @ centos] # useradd-g mysql[Root @ centos] # cd homexule[Root @ centos] # chmod 755 mysql-5.0.22.tar.gzCompile and install MySQL[Root @ centos] # tar

1> check the database and view the control file storage pathSQL> startupOracle instance started. Total System Global Area 230686720 bytesFixed Size 1218676 bytesVariable Size 71305100 bytesDatabase Buffers 155189248 bytesRedo Buffers 2973696

1: Add the following configuration to tomcat_home/solr/config/solrconfig. xml: data-config.xml     2: Create the data-config.xml file in tomcat_home/solr/config/(in the same directory as solrconfig. xml), add the following content     3: Add the

Oracle trigger query statistics table This project requires a hands-on drill to achieve the desired effect. It is roughly the same number of data inserted in the statistical table and the current data insertion time. Use row-level triggers +

This morning, a stored procedure has been written for many times. It can be easily written, reported for various errors, various confusions, and searched on the Internet, I did not mention the ending answer provided on the Forum. Let's take a look

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

At pm, I suddenly received a call from a MM in the test group saying that the database could not be connected. So I quickly logged on to the database and tried to log on. The connection remained in a waiting state for a long time. At that time, I

Hive external HBase table CREATE [EXTERNAL] TABLE [if not exists] table_name[(Col_name data_type [COMMENT col_comment],...)][COMMENT table_comment][Partitioned by (col_name data_type[COMMENT col_comment],...)][Clustered by (col_name, col_name ,...)[

When online backup is performed, the output is modified to dynamically upload the output content to the browser page.   Import java. io. BufferedReader;   Import java. io. IOException; Import java. io. InputStream; Import java. io.

Although talking about hidden parameters must be meaningless, but those hidden parameters are valuable, we have to "respect" those hidden parameters" In AUM, why does my Undo tablespace only grow and does not recycle it? Now it's more than 40 GB and

APIS involved in this article: Hadoop/HDFS: http://hadoop.apache.org/common/docs/current/api/ HBase: http://hbase.apache.org/apidocs/index.html? Overview-summary.html Begin!I. Overview The Export and Import tools provided by HBase are used. Export:

Sometimes, when the disk space is full and part of the tablespace or data files need to be migrated to the location, we will introduce three methods to move the data file next time. The same is true for moving the tablespace. 1. Use the OS MV mode. 2