oracle utl file

Table size that has two meanings. One is the amount of physical space allocated to a table, regardless of whether space is used or not. You can get the number of bytes in this query:Select Segment_name, bytesFrom User_segmentswhere Segment_type = ' TABLE ';OrSelect segment_name,sum (bytes)/1024/1024 from User_extents Group by segment_nameAnother type of space that the table actually uses. This query:Analyze table EMP Compute statistics;Select Num_rows * Avg_row_lenFrom User_tablesWHERE table_nam

Tags: blog http io os using AR for file dataOracle OS certified password file password loss processing classification: Oracle Basic knowledge2009-10-19 14:24 5031 people read reviews (9) Favorites report oracleos database SQL Telnet LoginOne. OS Authentication1.1 OS Certification IntroductionAfter Oracle is installed,

Welcome to the Oracle community forum and interact with 2 million technical staff to enter the Oracle database. This initialization parameter file is divided into two types: Text parameter files and server parameter files. Their content is the same, but the representation is different. The server parameter files are saved in binary format. Available database Welc

Oracle parameter files are critical to Oracle. No parameter file. Oracle cannot be started.Parameter files are dividedSpfile: The parameter file added after oracle9iR1. It is a binary file and cannot be edited directly.Pfile

Oracle Parameters I. Differences between Oracle pfile and spfilePfileThe default name is "init + routine name. ora "file path: e: \ oracle \ product \ 10.2.0 \ db_1 \ DBs. This is a text file and can be opened using any text editing tool.SpfileThe default name is "spfile + r

I have written a similar article before. Although it is not a problem to restore the physical files of the Oracle database, I always feel that there is something wrong. I learned later that I had some misunderstandings in the past. I have written a similar article before. Although it is not a problem to restore the physical files of the Oracle database, I always feel that there is something wrong. I learned

Under the Oracle installation directory $home/network/admin, you often see Sqlnet.ora Tnsnames.ora Listener.ora these three files, in addition to Tnsnames.ora, the other two files detailed use many people do not understand. 1. Sqlnet.ora is used on the Oracle client side to configure the relevant parameters of the connection server Oracle. 2. Tnsnames.ora used on

When operating Oracle, if Oracle cannot be started or stopped normally, or Oracle import/export command execution is incorrect, it is usually caused by the table in the Oracle instance When operating Oracle, if Oracle cannot be st

the Commands "GCC--version" and "g++--version" each return "4.1.x".10. Configure VNC or install XmanagerRootExport display= operating Machine IP address: 0.0 (Reference)Xhost +Su-oracleExport display= operating Machine IP address: 0.0 (Reference)DbcaInvoking OUI+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++

The use of parameter files in Oracle startup generally has the following situations 1 Single Instance 1.1 starts by default: In non-RAC environments, the parameter files for Oracle databases are placed by default in the $oracle_home/dbs directory, and the order in which Oracle automatically looks for parameter files is Spfile$oracle_sid.ora-> Spfile.ora-> init$or

1. Data File migration It's easy, just three steps. Step 1: Move the tablespace Offline to the directory specified by disk D. Step 2: Modify the tablespace file path alter database rename file 'old file path' to 'new file path '; Step 3: Make the tablespace Online. 1.1

Transfer Process:1. log on to sqlplus first: C:/Documents and Settings/jbdu> sqlplus "/As sysdba"2. Change the tablespace to offline: SQL> alter tablespace users offline;3. Copy tablespace files CopyD:/Oracle/product/10.2.0/oradata/orclado/users01.dbfH:/Oracle/product/10.2.0/oradata/orclado/users01.dbf 4. Modify the Oracle tablespace pointing address SQL> alter d

A Database is composed of one or more logical storage units called tablespace (tablespace). The logical storage units in the Tablespace are segments (segment), and segments can continue to be partitioned into data extensions (extent). The data extension is composed of a continuous set of data blocks (DataBlock). Large File Table space In Oracle, users can create large

Oracle online log files record the logs of data block changes during database operation. After the database becomes corrupted or fails abnormally, you must use online logs (or archive logs, repeat the changes in the database.When the log file itself is damaged (lost), the database may not be able to open normally. In this case, the recovery test is conducted (for reference only ): Change redo log size)

Solution to the problem that oracle cannot log on to sqlplus after the tablespace file is deleted by mistake, oraclesqlplus Background: Today I learned how to create a tablespace in the oracle database. So I rushed to create two tablespaces named/u01/test/my_01.dbf and/u01/test/my_02.dbf. Software: CentOS-6.7-x86_64, linux. x64_11gR2_database. The CREATE Command

--View the database run mode (spfile or Pfile)Select Decode (COUNT (*), 1, ' spfile ', ' pfile ')From V$spparameterwhere Rownum=1 and isspecified= ' TRUE ';--Start the database with PfileCreate pfile= '/u01/app/oracle/product/11.2.0/db_1/dbs/initdbtest.ora ' from SPFile;Shutdown immediate;Startup pfile= '/u01/app/oracle/product/11.2.0/db_1/dbs/initdbtest.ora ';--Start the database with SPFileCreate SPFile f

-rf/u02/database/SYBO2SZ/controlf /* Sys @ SYBO2SZ> ho ls/u02/database/SYBO2SZ/controlf/ --> A ORA-00205 error is received after startup Sys @ SYBO2SZ> startup ORACLE instance started. Total System Global Area 599785472 bytes Fixed Size 2074568 bytes Variable Size 276826168 bytes Database Buffers 314572800 bytes Redo Buffers 6311936 bytes ORA-00205: error in identifying control file, check alert log for

I believe everyone knows about Oracle log files. Next I will introduce you to Oracle Log File Management in detail. I hope you will have a better understanding of Oracle log files. The ORACLE Log File $ ORACLE_BASE/admin/orasid/bd

Tags: des style http io os ar using Java strongI. Oracle pfile/spfile differencesPfileThe default name is "init+ routine name. Ora" file path: E:\oracle\product\10.2.0\db_1\dbs, which is a text file that can be opened with any text editing tool.SPFileThe default name is "spfile+ routine name. Ora"

Have done some testing, in the startup or shutdown of the database to delete the control file, because this database is only my own test database, then did not care to recover. Today, when I wanted to start this database, I ran into problems: [Oracle@bjtest ~]$ Sqlplus "/As SYSDBA" Sql*plus:release9.2.0.4.0-production on Wednesday June 3 01:47:42 2009 Copyright (c) 1982, 2002,