IMP same library Type object import error ORA-02304

Type is a database object structure that we often use. In practice, we can define the type separately and then use it in PL/SQL code or data tables. In an accidental opportunity, I found that the use of the Type is troublesome in data exp/imp. When

MySQL Encoding Problems

View the current MySQL encoding: Mysql> show variables like \ '% character % \'; + -------------------------- + ---------------------------- + | Variable_name | Value | + -------------------------- + ---------------------------- + |

ORA-06502: PL/SQL: Number or value error: String Buffer too small Error Analysis

1. Cause This error will always occur when you recently perform some Oracle operations: ORA-06502: PL/SQL: Number or value error: string buffer is too small with the following error: ORA-00604: recursive SQL Level 1 error ORA-06502: PL/SQL:

Oarcle oracleHomeKey Processing Method

Oracle HomeKey error may occur in two cases. Error description: Initialization error SQL * Net not properly installed OracleHomeKey: SOFTWARE \ ORACLE OracleHomeDir: Solution: 1. An error is reported when you connect to oracle using some

Understanding redo (3) explain an update process

Theoretical analysis: 1) server process searches buffer cache for the block to be updated by update (also known as buffer in memory). If no block is found, it reads the buffer cache from disk. 2) server process constructs a group of change vectors

Installing Oracle 10g RAC Based on Linux (RHEL 5.5)

This article describes how to use vmware server in Red Hat 5.5 to install Oracle 10g RAC (OCFS + ASM). This article assumes that your RHEL5 has been installed, the specific configuration and installation process of Linux are listed below. I.

The Oracle listener cannot be started. The message "error 1067: Unexpected Process Termination" is displayed"

Today I encountered a problem: Oracle's OracleOraHome90TNSListener service cannot be started now, It can be started normally before, but now it is an error: OracleOraHome90TNSListener service cannot be started on the local computer. The message

MySQL MMM high availability solution

In mysql, a Single point of failure (SPOF: Single pointof failure) occurs in a simple mysql Master/Slave configuration. This fatal problem can be avoided through the mysql MMM project. What is mysql MMM? The official explanation is as follows,

ACTIVE log corruption (archived)

Archive ModeActiveLog corruption ActiveIndicates that the log has been switched and may have been archived. It may also indicate that the dirty blocks in the log have not been archived.DBWRWrite Disk View archiving path SQL>Show parameter recovery  

Add a listener for static registration under Oracle RAC

By setting different listener, you can isolate services in the Multi-instance c environment of one server to facilitate business start and stop and management. In addition to netca, the method to add is to use the srvctl command as follows: [Grid @

MySQL remote full backup

MySQL remote full backup: # Bash/sh! Echo"Start backup ..."  # MySQL Info SQL _user = root SQL _psw = root SQL _db = buke_user Name = $ SQL _db $ (date + % y % m % d). SQL Backup_path =/home/backup File = $ SQL _db $ (date has been

Basic MySQL database operation commands

1. Check the database version SQL> status; 1. net start mysql // start the mysql Service 2. net stop mysql // stop mysql Service 3. mysql-h host address-u user name-p User Password // enter the mysql database 4. quit // exit mysql 5. mysqladmin-u

SQL Server accesses Exchange data

Someone is looking for SQL Server to store Email data on the Internet. In fact, SQL Server provides OLE DB Provider to access Exchange. Microsoft ole db Provider for Exchange publicly stores data in Microsoft Exchange 2000 Web Store in tabular form.

Dynamic Oracle 11g sampling

Recently, I encountered a performance problem caused by dynamic sampling, which is a bit difficult for me to understand. by reading the document and doing experiments, I will summarize it as follows:Let's take a look at the Online Document's

Flashback table quick recovery of accidentally deleted data

In Oracle Database Operations, accidental data deletion and table drop often occur. In the past, after this happens, developers often seek help from DBAs or administrators to use database backup and recovery to retrieve the data. From oracle 9i, 10

CentOS6 10 Gb Oracle Installation Error

Oracle 10g is installed in CentOS6 for the first time. The following error occurs:INFO: Generating base orasdk library... INFO: Creating/u01/oracle/10g/product/10.2.0/db_1/lib/liborasdkbase. so.10.2 INFO: gcc:INFO:/usr/lib/libstdc ++. so.5: No

Query all sequences in Oracle

Query all sequences in Oracle: Note: 1. You must log on as an administrator; 2. sequence_owner must be in upper case, regardless of whether your user name is in upper case. Only uppercase letters can be recognized. -- View All sequences of current

When does the RMAN backup automatically back up the control file?

Target DB/RMAN Client: 11.2.0.1.0 1. When configure controlfile autobackup off;, only system01.dbf is backed up, the control file is automatically backed up; 2. When configure controlfile autobackup on; is enabled, any files (data files/archive logs)

MySQL installation and basic management in Linux

Install some required linux packages: Yum install gcc-c ++ gcc-g77 autoconf automake zlib * fiex * libxml * ncurses-devel libmcrypt * libtool-ltdl-devel * libevent To install mysql, you must download the mysql installation package. The

MySQL database operation instance

Environment Settings: After installing MySQL, install libmysql in the include directory. copy the lib file to VC \ lib \ In the VS2008 installation directory, add "c: \ MySQL \ include \" to the include directory in project-Option-c/c ++-general and

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