Oracle

There are two methods: SCN and time stamp two methods of recovery.I. Recovering deleted and committed data through the SCN1. Obtain the SCN number of the current databaseSelect Current_scn from V$database; (Switch to SYS user or System user

The Lpad function fills the string with the specified character from the leftBasic syntax: Lpad (String, Padded_length, [pad_string])String: Preparing the filled stringsPadded_length: The length of the string after padding, that is, the length of

Data Block Overview Oracle manages the storage space in a database data file (datafile) as a data block. A data block is the smallest (logical) unit of data in a database. Corresponding to the data block, the smallest physical storage unit of all

The new Listagg function in the Oracle 11g Release 2 release, Listagg is an Oracle built-in function that implements string aggregation;Listagg (column, ' delimiter ') within group (Order by column)-(Partition by column)The delimiter can be

Method One: Enter the connection information directly in the connection poolThe string followed by the connection information configured in the Tnsname.ora is stripped of the space and line breaks. (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP) (HOST = 1

1. Create a table with Oracle:Sql> Create TableLoginuser (2Id Number(Ten,2), 3Usernamevarchar( -), 4Passwordvarchar( -), 5Emailvarchar( -), 6Descriablevarchar2( $), 7RegDate date);Syntax for creating tables:CREATE TABLE table_name (

Oracle Import and Export command in detail (with database daily scheduled backup script) one. Export Tool EXP1. It is the next executable file directory of the operating system/oracle_home/bin  the EXP Export tool compresses the data backup in the

Vmware Server can vmware-workstation-full-the virtual machine from the official website http://www.vmware.com/cn/or from the network address 10.0.1-1379776 version, as well as the official CentOS website www.centos.org download out, of course you

Understanding stored procedures and functionsStored procedures and functions are also a PL/SQL block, which is a PL/SQL block deposited into the database. But stored procedures and functions are different from the PL/SQL programs that have been

What exactly does Oracle do when it submits an SQL command to Oracle? A good understanding of this problem can help you better analyze the optimization of SQL statements.Executing an SQL statement from start to finish requires 4 steps:

Linux on the Web server generally does not have a graphical interface, all the way to install Linux through the graphical interface on Linux without a GUI is not feasible, we want to use the installation method called Linux silent installation . It

Earlier export commands:[root@powerlong4 ~]# su - oracle[oracle@powerlong4 ~]$ ORACLE_SID=pt1;[oracle@powerlong4 ~]$ expdp \‘sys/systestpd as sysdba\‘ DIRECTORY=dir_dump_t3 FULL=YES DUMPFILE=expdpfull_pd_20150529_02.dmp......1, start importingSet up

Oracle statement INSERT into Select how to add subsequent insert conditions 2014-01-21 10:48 anonymous Category: Other programming Languages | browse 2,746 times There are BULK INSERT statements in Oracle INSERT INTO TableA (column 1, column 2,

First , pre-installation preparation1. Software Hardware RequirementsOperating system: CentOS 6.4 (32bit)Oracle Database version: Oracle 10g (10201_database_linux32.zip)Minimum Memory: 1G (check command: #grep memtotal/proc/meminfo)Minimum swap:2g

We look back at the files that were generated when the database was backed up.rman> backup database; starting backup at 2015/07/08 00:58:27using  channel ora_disk_1channel ora_disk_1: starting full datafile backup 

The decode () function is one of the most powerful functions of Oracle PL/SQL and is currently available only to Oracle Corporation, where SQL implementations of other database vendors do not yet have this function. Baidu Experience:

Plsql + green version of oracle remote database connection configuration and prompt the lack of msvcr71.dll SolutionI have been using sqldeveloper to connect to the oracle database. This is free of charge and is also officially released. Apart from

TNS-12537 TNS-12560 TNS-00507An error is reported when the Oracle listener is started, indicating that the connection is interrupted. [oracle @ localhost ~] $ Lsnrctl startLSNRCTL for Linux: Version 11.2.0.1.0-Production on 06-AUG-2014 20: 02: 16

Java-based Oracle database self-built tool Library When I learned how to operate Oracle databases in Java, I suddenly thought that I could create a tool class like php, which could greatly reduce the complexity of the Code. It can also improve work

Oracle connection configuration and instance backup and recovery, oracle instance Background: It is impossible for a team to build their own local database for project development. In most cases, the database on the server is used in a unified