Oracle

Two parameters related to undo:Undo_tablespaceUndo_management =autoOracle recommends that we use Undo to automatically manage after Oracle 9i;Undo_retentionThis parameter is used to ensure that the content in the undo rollback segment is not

Oracle data import Specifies table space1. Open the tool Oracle SQL Plus log in to the SYS user as DBASqlplus/nologconn [email protected] as SYSDBA2. Create a user and specify a tablespaceUse the Client tool or the Web Management console to create

CREATE OR REPLACE TRIGGER Xtgl_logon_triggerAfter logon on DATABASEBEGIN INSERT into Xtgl_logon (Sessionid,ipaddress,machinename,programname,logondate,logonid) VALUES (Sys_context (' Userenv ', ' SESSIONID '), Ora_client_ip_address,sys_context

View Oracle several ways to execute a planFirst, through the PL/SQL Dev tool1. Directly file->new->explain plan window, execute SQL in the window to view the planned results. Where the cost represents the CPU consumption, the unit is n%,cardinality

Select sid,serial# from v$session where schemaname= ' SCOTT ';Select P.spidFrom V$session S, v$process pwhere s.paddr = P.addrand S.sid = &1and s.serial# = &2;EXEC dbms_monitor.session_trace_enable (sid,serial#,waits=>true,binds=>true);EXEC

Description: JAVA springmvc+mybatis (Oracle and MySQL) HTML5 new tall background framework1. Support App mobile app (Android and iOS) interface call (JSON interface can be interfaced with other programs)2. New tall Changquan html5+css3.0 development

First of all, we visited Oracle's official website: www.oracle.com Understand some of the site's resources, download pages and download instructions, although they have been to the official website to download the JDK and other related resources,

After unremitting efforts to find the 32-bit version can be downloaded! Celebrate!http://115.com/file/e7qt7lyb#Oracle_database_11g_r_2_ (11.2.0.3) _32bit.part01.rarhttp://115.com/file/dpqmpi8v#Oracle_database_11g_r_2_ (11.2.0.3)

A package is a collection of procedures and functions, including the creation of packages and the creation of packages, and the process and functions that can be defined in the package body when the package is created.eg--Create a packageCreate or

If you are using an Oracle database, then hibernate's mapping file. Hbm.xml is as follows:This ID is not generated automatically by the database, which needs to be noted, and the fields must correspond to the entity class, and the corresponding get (

1, query Oracle version, database SID select * from V$version; Select name from V$database;2. Query the features supported by the Oracle database SELECT * FROM V$option;3. Get the database character set SELECT * from Nls_database_parameters; SELECT *

Redhat/centos The following error occurred while installing ORACLE11GR2:[INS-20802] Oracle Net Configuration Assistant failedTo view the corresponding log file, the information is as follows:Info:oracle Net Services Configuration:INFO: #INFO: # An

Newubuntu12.04server install oracle11gr2 1. Links to the official installation documents are as follows: Http://www.techienote.com/tag/oracle-database-11g-r2-on-ubuntu-12-04 2. Install the VNC service and install Images   Note: If some software

ORA-00600 [kqlInvObj: user] Processing Today, our brother called us to say that after I installed 11.2.0.1.0 on the Development Database (win7 64bit), I had a problem with the Data Pump derivative, which was hard to solve. Then I ran the SQL

Step-by-step explanation of ORACLE (Lecture 4)1. Database Administrator1. Differences between sys and system (instance description)In the first lecture, I said the following two sentences: (1) a sys user is a super user with the highest permissions

Deferred_segment_creation of the 11g Parameter Deferred_segment_creation Boolean The default value is true. This parameter is not found in 10gR2, and is available in 11g. It can also be seen from the literal meaning that when this parameter is set

ORA-30009: insufficient memory for CONNECTBY operations Today in the 11G environment manufacturing data encountered ORA-30009: connect by Operation memory is insufficient, 10g began to support XML, changed to xmltable can be. SQL> drop table t_range

Oracle stored procedures and functions, oracle stored procedures 1. in Oracle, stored procedures consist of three parts: the definition part, the execution part, and the exception handling part (that is, the exception) Eg1: Enter the employee ID to

Oracle Advanced SQL (iii) -- recursive query, oraclesql -- RecursionOracle has the connect by clause. Is used for hierarchical query. Recursive query. The syntax is as follows: SELECT ... FROM WHERE START WITH CONNECT BY Note: 1. CONDITIONAL-1

Oraclenotexists equivalence statement Not exists can be changed to left join + is null. It can be seen that the execution plan is the same before and after rewriting, and the resource consumption is the same, which means it is equivalent. SQL> drop