Database Administrator

This error may occur when you use RMAN to restore SPFILE from AUTOBACKUP. Here is a brief summary. When RMAN recovers SPFILE, the following error may occur: RMAN> restore spfile from autobackup; Start the restore on March 10-11Use channel ORA_DISK_1

Experiment document: Process: Create a table-backup-simulate downtime (delete a table)-restore a backup-restore the current data.1. Restore and restore the experiment Create a database and use the drop statement to simulate database downtime. Use

1. Understand When logws write redo logs into the redo log file in the redo log buffer to understand commit; Write when redo log buffer 1/3 is full Write at commit When a log switch occurs, write Write when the generated redo is 1 MB When DBWN

Oracle Database-based data synchronization technology can be divided into two types: data synchronization technology provided by Oracle itself and data synchronization technology provided by third-party vendors. Oracle's own synchronization

In compiling PL/SQL, it may take several seconds to pause the program and continue execution. Check that dbms_lock.sleep (10) is provided in Oracle. However, you must install the dbms_lock package on your own, the demo is as follows: C: \

I finally completed multiple mysqld configurations on a single machine. I used the mysqld_safe command to complete the configuration. Step 1: Install the database: ./Configure -- prefix =/usr/local/mysql-master Make & make install ./Configure --

When using P/l SQL to create a table, if the keyword is used as the field name, such as uid, type, date, etc., an invalid identifier (invalid identifier) is prompted ). In some cases, you have to use keywords as field names, just like what to do

Today, when I am developing a project about **, I am using PLSQL to connect to Oracle. However, in Myeclipse DB's attempt, the url I have been using is the following code: Jdbc: oracle: thin:127. 0.0.1:1521: Jdbh The following error message

I. OverviewSGA, PGA, and UGA are all memory zones managed by Oracle.SGA (System Global Area) is the most important memory Area in Oracle.PGA (Process Global Area), that is, the Global Area of the program, a dedicated memory Area of the Process.UGA

This period of time is responsible for the database management of a project development. The development database in this project is separated from the test database. Some system table data and basic data often need to be synchronized, to facilitate

Oracle single table stream replication is completed. Due to the many steps of oracle stream operations, many problems have been encountered before, Failed because I did not clarify my thinking or did not understand this. For important tables, stream

The original controlfile is available below: The procedure is as follows:Startup force;Alter system set "_ allow_resetlogs_upload uption" = true scope = spfile;Recover database using backup controlfile until cancel;Alter databse open resetlogs; SQL>

Oracle 10g ORA-600 [19004] problem is there on 11Gr2? The application reports a 600 error.A 600 error was found during log query.Alert log file:Mon Dec 05 19:08:08 2011Errors in file d: \ app \ ibsadmin \ diag \ rdbms \ orcl \ trace \ orcl_ora_00004.

1) LPAD method: SELECTLPAD (sal, 8,'0')FROMEmp; 2) TO_CHAR Method SELECTTO_CHAR (sal,'123')FromEmp; 3) SUBSTR Method SELECTSUBSTR ('123'| Sal,-8)FROMEmp; ========================================================== ===============================

When learning basic knowledge about Oracle, we will understand the concept of Instance Recovery or Crash recovery, sometimes even these two terms share the same meaning in our daily language. In fact, there is a difference between Instance Recovery

In addition to the built-in DBCA, Oracle can create databases. Another method is to manually create databases, which must be mastered by DBAs. The following describes how to manually create a database:To manually create a database, follow these

Comparison between truncate and delete operations Operation Rollback High waterline Space Efficiency Truncate No Decrease Reclaim Fast Delete Yes Unchanged Do not recycle Slow

Creating tables in Oracle to hook the same or consistent tables can also be used in many cases. Convenient. For example, a department table exists as follows: SQL> select * from dept;       DEPTNO DNAME          LOC   ------ --------------

1. Enable binlog Mysql Servers-id = 151 Log-bin =/opt/soft/mysql/binlog/mysql-bin Binlog_format = MIXED 2. obtain basic backup /Opt/soft/mysql/bin/mysqldump-p123456 -- single-transaction -- master-data = 2 AdDataCenter | gzip> AdDataCenter. SQL .gz 3

Oracle 11g Release 1: http://www.oracle.com/technology/software/products/database/index.html RHEL5 under the ASMLib2.0: http://www.oracle.com/groovy/global/cn/tech/linux/asmlib/index.htmlopen the page, will find a Red Hat Enterprise Linux 4 AS (x86)