Oracle

method, adjust PublicDataTable Sayhi (stringSQL, DateTime begintime, DateTime endtime,string[,] array,stringBtime,stringdtime) { stringConstr =@"Data source= (description= (address= (protocol=tcp) (host=10.93.64.242) (port=1521))

Tools: Graphical Tools Vnc,oracle 11gSteps:1. Start Vncserver Service650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/57/B8/wKioL1SjcB2iUfgIAADgH5pSj1g200.jpg "title=" Qq20141231113753.png "alt=" Wkiol1sjcb2iufgiaadgh5psj1g200.jpg "/>2.

The database link of a distributed database is one-wayDefining Database LinksCREATE DATABASE LINK [Db_link_name] CONNECT to[USER_NAME] identified by [password] USING ' [tns_name] ';[Db_link_name]: is the service name of the database to which you

For table data Recovery, mistakenly delete the table data, generally do not operate this table, according to the following processing, you can restore the table data.Scenario: If you mistakenly delete the data in the table tabletest, you can use the

1. View the values of the current two parametersSqlplus/nologSql>conn/as sysdbasql>select Count (*) from v$session; From here we can see the current session numbersql>select Count (*) from v$process; From here we can see the current number of

Proper use of indexes can improve the speed of data retrieval and can create indexes on fields that frequently require queries.Oracle's index is divided into 5 types: Unique index, combined index, reverse key index, bitmap index, function-based

in theOracle 10gversion ofPatchsetinside, there's only one fileDisk1. to theOracle 11.2.0.2and the11.2.0.3of thePatchsetthe size is soaring. 11.2.0.2and the11.2.0.3version ofPatchsetis a5G.  it5Ghave a7files are made up of. is a patchset of 11.2.0.2.

Oracle has so many pits.The pits that have been waded are:1, cold backup. Win32 to Win64 need to perform a number of steps.2. Gradually open the database.Close: ShutdownOpen: Startup Nomount alter DATABASE mount; ALTER DATABASE open;Oracle boot is

When loading data in bulk, we often use SQL Loader. But often there are error cases.I was in the batch processing time, also appeared 500 error, the prompt cannot open the file. I also struggled for a long while, also repeatedly proofread the

1: The effect is as follows:Table T1:CREATE TABLE T1 ( weekworkid VARCHAR2 (20), Table T2CREATE TABLE T2 ( weekworkid VARCHAR2), NR VARCHAR2 (20))SQL statements:Selectt2.weekworkid,t2.nr,t.dd fromT2 Left Join ( --4 filtering result sets

After you install Oracle successfully, there are three users by default: SYS, System, ScottLogin command:Sqlplus username/password @sid [as SYSDBA or Sysoper]User:SYS User: Super administrator, highest privilege, its role is DBA, default password is

In Oracle, sometimes the sort keyword is seen in the execution plan, and some people think that sort is done, but not necessarily. You can experiment with the following methods:drop table test Purge;CREATE TABLE Test as SELECT * from

--query permissions to see which pkg the system has failed. (The pkg of our system is generally created by Oper users)SELECT * from All_objects a where A.owner = ' gnbsoper ' and a.status = ' INVALID ';--View constraints on system tablesSELECT *

Yu Tong More than 30 years, the official to the best, and academic nothing, virtue of a can not be allowed, eldest brother injury, frightened anxiety ashamed shyness. This will be a farewell to you, and the special four to teach your brother.One day

OCP 11g Chapter 2 exercises, ocp11g Chapter 2 exercises Exercise 2-1 Install SQL Developer on a Windows computer In this exercise, SQL Developer is installed on a Windows computer 1. Download the current SQL Developer version from the following URL:

Oracle has many pitfallsOracle has many pitfallsExisting pitfalls include:1. Cold backup. The steps from Win32 to Win64 are required.2. Open the database gradually.Close: shutdownOpen: startup nomount alter database mount; alter database open;The

Oracle basic database backup and recovery, oracle Database Backup I. Why data backup? Main causes of data loss: 1. Media fault. 2. User error operations. 3. server crash. 4. computer viruses. 5. unpredictable factors.   There are four fault types in

Oracle transaction principle Inquiry 1 -- oracle Core Technology Reading Note 5 1. Conflict Resolution Suppose there is a system that only has two users: You and me, and we are constantly modifying and querying a small part of the data in the system.

Oracle11g + CentOS6 + DG installation recordsBased on a practical operation record, this article describes how to use rman for Hot Standby to create a physical Active standby database of dataguard. In this way, the master database only needs to be

DB notes (Oracle) DB notes (Oracle) 1. Oracle Installation, Service Startup, database creation, and User Creation (omitted ). Ii. Select statement: (1) Single Row functions: 1. Expression and null calculation, the result is null, that is, not