Oracle

Familiar with Oracle machine environment and Oracle client configuration; Master and use the DDL language to establish, modify, and delete database tables, primary keys, FOREIGN KEY constraint relationships, and indexes. (Build database table)

1,oracle installation is complete when you create a DB instance, the Sys,system,scott is generated automatically2,sys user Super Administrator with highest Oracle privileges, SYSDBA role with CREATE DATABASE permission, default password

How to restore a database using legacy Oracle tablespace files after oracle11g the operating systemRecently due to a system reload, when restoring a DMP backup file, the system is not functioning due to data reasons (the table did not export all

Review MySQL CREATE TABLE statement users (ID integer/name string/birthday date type, default today)Drop table if exists users;CREATE table if not EXISTS users (ID int (5) Auto_increment primary KEY,Name varchar (4) is not NULL,Birthday date default

Recovering a database using RmanBecause of the need to build a test environment, the last weekend of a full-time recovery, first back up the test library on the existing important tables: Exp Banping/[email protected] file=f:\20090905.dmp

What are view "views"(1) A view is a virtual table(2) The view is based on existing tables, and the tables on which they are built are called base tables.(3) The statement that provides the data content to the view is a SELECT statement that can be

Oracle's cluster management software and databases are very dependent on the private network, and many cluster problems can be attributed to the network level at the end.It is necessary to check the network information when there is a problem with

First, back paragraph introduction In an Oracle database, when something modifies the data, Oracle first saves the original value of the data to a fallback segment. A thing can only save its fallback information to a fallback segment, while multiple

Today with Plsql query tool splicing SQL query display garbled, do not know why.Later through the multi-find information is now shared as follows.For the Oracle stitching function garbled, first query the Oracle character encoding is supported in

First, 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 represents the number of rows executed,

My lab Environment:Source Production library (main Library):IP Address: 192.168.1.30Oracle 10.2.0.5 Single InstanceNew DG Library (repository):IP Address: 192.168.1.31Oracle 10.2.0.5 Single Instance 1. Source Production Library Open Archive

1. Understanding Resource Manager Terminology 2. Understanding Resource Manager Allocation method 3. Understanding Default_plan 4. New Resource Plan 5. Create a consumer group 6. Understanding Resource Allocation methods 7.

When doing a patrol on an Oracle server, using the following SQL to find the highest disk_read top SQL analysis, there are some anomalies in the parsing process that have an SQL statement, which makes people feel strange:SELECT sql_id,Look at the

1. Querying the system for all objectsSelect owner, object_name, Object_type, created, Last_ddl_time, timestamp, statusFrom Dba_objectsWhere Owner=upper (' Scott ')–2. View all system tablesSelect owner, TABLE_NAME, tablespace_name from Dba_tables–3.

Comparison of date functions between MySQL and Oracle (i)First, SQLShort Date format: yyyy-m-dSELECT REPLACE (CONVERT (varchar), GETDATE (), +), N '-0 ', '-')Long date format: yyyy mm month DD DaySELECT STUFF (STUFF (CONVERT (char (8), GETDATE (),),

1. Introduction to TriggersTriggers are stored in the database as separate objects, similar to procedures (procedure) and functions, and have PL/SQL blocks that declare, execute, and process exceptions. Unlike stored procedures and functions, stored

AnimalID Name1 dog1 cat2 LionHow do I get the name list with the same ID? That is, you want the list of ID 1 to be dog, cat format.1. First Oracle has a method, Wm_concat ()Select a.ID, Wm_concat (a.name) as Namelistfrom animal Agroup by a.ID But

System environment:Windows Server R2 Ent. 64bitWhen configuring Dbcontrol with EMCA, it prompts: "Critical: Error uploading configuration data to the repository", which is caused by IPV6. The network card configuration in the IPv6 disabled still not,

--View lock table process SQL statements 1:select Sess.sid, sess.serial#, Lo.oracle_username, Lo.os_user_name, Ao.object_name, Lo.locked_ Modefrom v$locked_object Lo, dba_objects ao, v$session sesswhere ao.object_id = lo.object_id and lo.session_id =

1.c# Code: Public BOOLUseramountchange (dictionarystring,Long> Fee, dictionarystring,Long>Recharge) { varf =Getrechargetypearray (fee); varR =Getrechargetypearray (recharge); using(OracleConnection conn = This. CreateConnection