Oracle

Recent projects in Oracle have encountered a number of problems, such as adding self-added columns to Oracle tables, unlike SQL Server, because they have not previously been exposed to Oracle's development.Oracle does not have functionality such as

Delete Table partition (drop partition)Deleting a table partition consists of two operations, namely:Ø Delete partition: ALTER TABLE [tbname] Drop partition [ptname];Ø Delete sub-partition: ALTER TABLE [tbname] Drop subpartition [ptname];In addition

Oracle violates FULL constraint conditionsOracle ORA-02292: Violation of full constraint (UNITELE.TA_SUB_REFERENCE3)-child record foundTable A is referenced by the B table, delete a When the table is prompted to ora-02292,a the primary key is

1 Test2----Pack Create or replace package test_pkg1 is  procedure test_p (v_id    in sys_user.id%type,                    v_name in sys_user.name%type,                    msg     out varchar);end test_pkg1;--  Package Body Create or replace package  

The connection to the Oracle server is very slow and may be affected by the following reasons. The network is not good, the Oracle server and the local network are bad. The Oracle server is out of memory and causes the response to be

2015-11-10View Total tablespace capacitySelect sum / 1024x768 / 1024x768 as from Group by Tablespace_name;View Table Space usageSELECTA.tablespace_name,total,free, (total-FREE), total/(1024x768*1024x768*1024x768), free/(1024x768*1024x768*1024x768)

Turn http://www.cnblogs.com/252e/archive/2012/09/13/2682817.htmlQuery and delete duplicate records of SQL statement 1, find redundant records in the table, duplicate records are based on a single field (ID) to determine the select * from table where

1 The difference between function and procedure1). You can understand that a function is a 2 of a stored procedure. A function can have no parameters, but a return value must be required, and the stored procedure can have no parameters and does not

· Understanding Tables　　The tables in Oracle are stored in a table space and have the following characteristics:Basic storage unit for data Two-dimensional structureLine: Also known as ' record 'Column: Also called ' field or domain ' conventions①

Oracle Database InstallationNote: ORCL, the installation process designated Sys,system and other related account password The Scott account has four commonly used tables, you can use the system or SYS as a sysdba in, alter the user Scott account

8 seconds to add 20,000 data in bulk. try { String url = "Jdbc:oracle:thin: @IP: 1521:ORCL"; //ORCL is the SID of the database String user = "Oracle"; String password = "Oracle"; StringBuffer sql = new StringBuffer (); Sql.append

PL/SQL sets the encoding method, and plsql sets the Encoding(21:38:33)Reprinted token Tags: Miscellaneous Category: ORACLE Garbled characters occur when exporting SQL files. Baidu later found that the problem was caused by

Oracle row-column conversion, oracle row-column ConversionI. Table creation and data insertion 1.1 create a table 1 create table kecheng 2 (3 id NUMBER, 4 name VARCHAR2 (20), 5 course VARCHAR2 (20), 6 score NUMBER 7); 8 insert into kecheng (id, name,

Silent Installation of oracle Database Software1. Check the syntax because there are too many options. Here we will only list the required $. /runInstaller-helprunInstaller [-options] [() *]-silent: silent mode-responseFile: The response File

Use of Oracle display cursor and cursor for loop, oracle cursor for Loop The following describes the situations in which implicit cursors and display cursors are used: 1. When the query returns a single row record → implicit cursor; 2. When multiple

Differences and exercises between rownum and row_number () in oracle databasesIt is clear that for rownum, it is the number of the row returned from the query that is sequentially allocated by the oracle system. The first row is allocated with 1,

Differences and exercises between rownum and row_number () in oracle databases, rownumrow_number It is clear that for rownum, it is the number of the row returned from the query that is sequentially allocated by the oracle system. The first row is

Oracle em webpage inaccessibleCheck the status of emctl status dbconsoleOracle Enterprise Manager 11g Database Control Release 11.2.0.3.0 Copyright (c) 1996,201 1 Oracle Corporation. all rights reserved. https: // udbs01:

Oracle oradebug command usage1> what commands are available for oradebug? Log on to the database as sysdba, you can see the Common commands sqlplus/as sysdba oradebug help 2> tracking the current session information oradebug setmypid -- tracking the

Oracle shared server Configuration1. A serverprocess is allocated to each session of the dedicatedserver until the user is disconnected. In most cases, sessions are idle, so resources are occupied. In some cases, the exclusive server mode must be