Oracle

This error occurs when multiple installations of Oracle are unsuccessful.Proper installation of Oracle is a prerequisite1, install the latest JDK, not jre!! (and with the environment variables, in the CMD test java-version and Javac-version can be

For Oracle's rownum problem, a lot of data are said not to support >,>=,=,between...and, only with the above symbols (,>=,=,between. and will prompt SQL syntax error, but often do not find a record, but also appear to be inexplicable results, in

Excerpts from the official documents of 11g:      unusable  specify unusable to mark the index or index partition (s) or index subpartition (s) UNUS ABLE. The space allocated for a index or index partition or subpartition is freed immediately when

Importjava.sql.Connection;ImportJava.sql.DriverManager;Importjava.sql.SQLException;ImportJava.sql.ResultSet;Importjava.sql.Statement; Public classDB {Private StaticConnection con =NULL; Private StaticStatement sql =NULL; Private StaticResultSet rs

Oracle users are an important concept in Oracle databases, and here's a look at the differences between Oracle users and schemas, and hopefully help you learn from Oracle users. Recommended Learning Tutorials Yet Silicon Valley Oracle Video

When Oracle implements paging, a rownum function needs to be introduced, and rownum can record an ID-like field.The following is a collection of several commonly used SQL paging algorithm, the database with the EMP in Oracle as an example. The query

To import the company's database into your own computer (you will need to enter commands under the command window)To export the base code for a database:Exp Zj_user_kf/[email protected]_4 file=d:\test3.dmp full=yImport Database: The first is to

1. First enter the SQL Plus window (see previous article)2. Enter after: Enter select Username,account_status from dba_users where username= ' SYSTEM ';3. Query the system user's status and user name, here can query out the password, but the

CREATE OR REPLACE FUNCTION "Ufn_getids" (Opekind in VARCHAR2,--query type PARAMS in varchar2--query field) RETURN Clob is Str_return clob;--varchar2 (30000); BEGIN      if      opekind = ' 1 '    then      & nbsp DECLARE              Cursor Cusor1

Oracle can use the Decode function to sort by custom order:Select * from ( Select 'Nick' asItem fromDualUnion All Select 'Viki' asItem fromDualUnion All Select 'Glen' asItem fromDualUnion All Select 'Robin' asItem fromDualUnion

Install Agent AgentIn the em11g, agent installation is through the host side of the producer to download Agent agent and installation, on the EM12C version, on the EM12C server, through the "push" way the agent agent in the remote installation to

Year, English full name of vintage YYYY: Year four-bit representation Yyy,yy,y: The last three, two, or a bit of the year, the default is the current century Month Number of mm:01~12 Month: Nine characters in months, and the right is

1. Modify the user password: Log in to Sqlplus as DBA and enter the command:ALTER USER username identified by NewPassword;Note here: The new password must not be less than 7 characters Upper The first character cannot be a number.2. Unlock user

The initialization parameters of the Oracle database are mainly derived from the two Oracle internal data dictionary tables: X$KSPPCV and X$ksppi usually we query the V$parameter view or use the show parameter command from both system tables,

Application background: You need to view and modify the data in the Interlib, so you have to repeatedly import and empty the backup data. Organize your steps Delete TablespaceDrop tablespace interlib including contents; Delete UserDrop

First create a test table and record the parsing statistics: 650) this.width=650; "Style=" border-bottom:0px; border-left:0px; border-top:0px; border-right:0px "title=" image "border=" 0 "alt=" image "src=" http://img1.51cto.com/attachment/201411/4/7

It is important to be able to roll back when doing DML operations on data in the databaseThe following example modifies the data in a database

Oracle set operation functions: Union, UnionAll, Intersect, MinusUnion: Perform Union operations on two result sets, excluding duplicate rows, and sort the default rules at the same time;Union All: Perform Union operations on the two result sets,

Obtain Oracle implicit parameter information The Oracle Database initialization parameters mainly come from two internal Oracle Data Dictionary tables: X $ KSPPCV and X $ KSPPI usually the V $ Parameter view we query or the show parameter command

[Oracle] display connect by, oracleconnect   1. Display by organizational structure relationship Create or replace view v_vieworgSelect -- v. OBJID, v. OBJNAMELevel as levelid,Lpad ('', 2 * level-2) | v. OBJNAME as OBJNAME, v. OBJID, v. OBJCODE,