Oracle

  How to create the best index? 1. Create an index explicitly Create index index_name on table_name (field_name) Tablespace tablespace_name Pctfree 5 Initrans 2 Maxtrans 255 Storage ( Minextents 1 Maxextents 16382 Pctincrease 0 );   2. Create a

Spring + struts + ibatis + extjs is used for development, and oracle is used for database Ibtais configuration paging fuzzy query Java code Bmzdm LIKE '% $ objCondition. bmzdm $ %'AND rymc LIKE '% $ objCondition. rymc $ %'ResultClass =

I. IntroductionMaterialized View, as its name implies, is a physical view that is actually stored on the hard disk. query performance is better than normal views. Ii. materialized view principle:1. generate dataTwo major options: build immediate

Note: The following indicators are taken from the performance analysis indicators provided by the Oracle performance analysis tool Statspack.   Indicator Name Indicator description Indicator range Indicator Unit 1.

Exp/imp has many parameters. If you use it frequently, you can use the parameter file to improve efficiency. You can directly modify the parameter file later. You do not need to re-enter a long command.You can add or delete keywords in the parameter

Common Oracle tablespace operations -- Create a tablespace create tablespace test datafile 'e: \ test2_data.dbf 'SIZE 20 M autoextendon next 5 Mmaxsize 5000 M; -- View tablespace Information select tablespace_name, file_name FROM dba_data_files

ORA-00401: the value for parameter compatible is not supported by this release Solution [SQL] [oracle @ rhel5 ~] $ Sqlplus/as sysdba SQL * Plus: Release 10.2.0.1.0-Production on Sun Aug 11 08:59:13 2013 Copyright (c) 1982,200 5, Oracle. all rights

Oracle JOIN and semi-JOIN] connecting ORACLE multi-table JOIN is divided into three categories: next loop, sort merge, and hash join. Each category is divided into three categories: traditional Join, Semi Join, and Anti Join. (The last two are

Oracle Database error ORACLE not available solution the following Error occurs when running commands such as exp, imp, or sqlplus: EXP-00056: ORACLE error 1034 encounteredORA-01034: ORACLE not availableORA-27101: shared memory realm does not

Oracle Text (full-Text search) View database tutorial Information select * from nls_database_parameters1. Simple Application1.1 to use full-text search, the current ORACLE user must have the CTXAPP role -- Create a user-- Create user textsearch

This article introduces in detail various oracle Array Operations. If you need it, you can refer to it. Oracle Arrays can be divided into fixed arrays and variable arrays.Fixed Array   The Code is as follows: Copy code

This article briefly introduces how to format SYS_GUID () in oracle to a standard format. If you need to learn more, you can see it. In Oracle, RAW (16) is used to save SYS_GUID () results, but the byte order is different from the standard GUID. As

This article introduces how to import and export elasticsearch. For more information, see. The Code is as follows: Copy code ORACLE_192.168.28.1 =(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP) (HOST = 192.168.28.1) (

Recently I collected some questions about how THinkPHP connects to the Oracle database. Many of my friends follow the mysql connection method, which causes some methods to be unavailable in Oreale. For example, the findAll and Select methods cannot

Content• Full Table Scans)• Rowid Scans)• Index Scans)• Cluster Access)• Hash Access)• Sample Table Scans)• How to select an access path for the Query Optimizer• Remarks  The Access path (Access paths) is used to retrieve data from the database.

This article introduces some usage of oracle Regular Expression functions, including matching. Oracle10g provides the function of using regular expression in queries, it is implemented through various functions that support regular expressions in

This article summarizes the majority of users in the use of ipve database is the emergence of a client connection times ORA-01019 error collection summary, there is a need for friends can refer. In. net + oracle development, when publishing web

In Oracle, the multi-Table cascading deletion method is often used in the case of large data volumes. If we delete small databases, we can directly use delete to delete them, if the data size is large, cascading deletion of multiple tables will

This article introduces a summary of common Oracle Database problems and summarizes some problems and solutions when using oracle databases. For more information, see. 1. When PLSQL connects to the database, it prompts that the listener cannot

Lock tables are a common feature in many databases. I will introduce some examples of query lock tables and unlock statements in oracle. Thank you for your reference. Query lock table statements The Code is as follows: Copy code