Oracle

This article refer to http://blog.csdn.net/indexman/article/details/7748766 The syntax is described as follows: TRIM ([{{leading | TRAILING | BOTH} [Trim_character] | Trim_character} from] trim_source) Parameter explanation: Leading opening

Problem Description:When Oracle uses PL/SQL DEVELOPER to visualize a table, the table name does not follow the specification to establish an illegal form of table icd-10th-version (the middle has crossbar, illegal). But I don't know what's going on

Ext.: http://www.2cto.com/database/201210/163979.htmlTemporary tables: Like normal tables, there is a structure, but the management of the data is not the same, the temporary table stores the transaction or the intermediate result set of the session,

Ibatis the paging settings for Oracle to MySQL under the framework. Oracle: parameterclass= "Java.util.HashMap" >//the ID that is used when invoking the method, the result type returned, the parameter type passed in Select * from USERS id =

Oracle database Chinese character ordering today needs to be sorted by one of the middle text segments of a table in the Oracle database, it would have been a simple thing, not an order by, but it was not right to find a shot, a time to feel

Oracle initialization or shutdown in progress this error message when you log in to Oracle today, searching the web, trying a lot of ways, and finally combining several methods to successfully solve the problem! cause : I mistakenly delete a

First, authorize the specified user.There can only be one user's default tablespace, but you can try to use the following statement to authorize it to create a pair of images in another tablespace:Alter user username Quota 0| | Unlimited on

I. Naming rules for table names and columns1, must start with a letter. 2, the length can not exceed the characters. 3. You cannot use Oracle 's reserved words. 4, can only use the following characters a -Z, a-Z,0-9,$, # and so on. Ii. data types

In Oracle, even if the condition is not met, the NVL function also performs a conditional non-conforming option, and for the Decode function, if there is a custom function in it, decode will not execute the non-conforming function, but if Decode has

This digest from: http://blog.csdn.net/nsj820/article/details/65711051, change the client character set: Run Regedit from the Windows Run menu, modify the registry startRun--Rededit under Registry Editor-> HKEY_LOCAL_MACHINE,

There are two simple examples to illustrate the efficiency issues of "exists" and "in"1) select * from T1 where exists (select 1 from T2 where t1.a=t2.a);When the T1 data volume is small and the T2 data is very large, the query efficiency of T12)

ORACLE11G after you have spent a long time, you find that the disk space will be reduced, and the data is not imported, after a while you will find that there is no space for disk space, and then I find the reason is that Oracle 11G will

1after installing the Oracle database: Execute Dbstart and Dbshut will prompt: [[email protected]~]$ Dbstartoracle_home_listner is isn't SET, unable to auto-start Oracle Net listenerusage:/u01/app/oracle/oracle/product/10.2.0/db_1/bin/Dbstart oracle_

Syntax: drop table ... purge; example: Drop table Test Purge;purge is deleted directly from tables, not reserved to Recycle Bin, 10G start default drop table name change to recycle Bin; Flash back (Flashback) statement: 1, Can restore a table to a

Testing for a long time, the online method is many, in fact, are wrong, the correct way of writing:Declare cursor Rowall is a select * from Tb_news where 1=1; Row1 Tb_news%rowtype; i int; Begin I: = 0; For row1 in Rowall

Original address: http://blog.csdn.net/zhldt2008/article/details/79539321. The following statement queries the locked table:SELECT l.session_id Sid, S.serial#, L.locked_mode,l.oracle_username,L.os_user_name,s.machine, S.terminal, O.object_name,

The first step is to make a backup first#!/bin/shExport oracle_base=/home/oracle/Appexport Oracle_home=$ORACLE _base/oracle/product/11.2.0/Dbhome_1export Oracle_sid=Orclexport Ld_library_path=$ORACLE _home/bin:$PATH:$HOME/bin//Note is a colon RQ= '

creation and operation of Oracle database partitioned tablesSummary: In a large number of business data processing projects, you can consider using partitioned tables to improve the performance of the application system and facilitate data

I. Identifying a DB instance when using database native connection databaseThat is, when you use Sqlplus to connect to the database, Oracle_sid is the one that connects to that DB instance. It has nothing to do with an instance of @Second,

Oracle Data Pump remote import file to local database -- Log On As A dba C: \ Users \ Administrator> sqlplus/as sysdba -- Create a user SQL> create user bfzg0828 identified by bfzg0828 default tablespace users quotaUnlimited on users; -- Grant the