Oracle

Import the smc oracle import command: www.2cto.com Bat code @ echo off rem Oracle's sys User Logon password set ORACLE_SYS_PASSSWORD = 123456 rem CMS user name set ORACLE_CMS_USER = CMS800 rem CMS set ORACLE_CMS_PASSWORD = 123456 echo create a CMS

Oracle Star Schema analysis Star conversion is a very powerful optimization technology, which is implemented by implicit rewriting of the original SQL statement, it can greatly reduce I/O. end users do not need to know any details about star

The role and principle of Redo in Oracle: Oracle uses Redo to ensure that database transactions can be replayed, so that data can be restored after a fault occurs. Redo is crucial for Oracle databases. In the database, the Redo function is mainly

Comparison of Oracle temporary table usage temporary tables is a common means of complex SQL Performance optimization. Www.2cto.com 1) Global Temporary sentences can be divided into sessions and transactions. Session-level Temporary Table [syntax]

Modify the password of an oracle user and unlock the user in sqlplus. 1. log on to the oracle user and connect to the database www.2cto.com [oracle @ wuzj ~]. $ Sqlplus/nolog SQL * Plus: Release 10.2.0.1.0-Production on Thu Feb 26 12:06:29 2009

 Use: www.2cto.com (1): select case when 1 = 1 then 1 end from dual; Result: www.2cto.com (2): Table Structure: select (case when xm = 'gao' then' high sales volume 'when xm = 'zhu' then' sales volume surnamed zhu 'end ),Sal from table3; Result: www.

Oracle index migration, release disk space index file migration steps: preparation: 1) backup GBOS User table index: Use plsqlDevelop tool to export all GBOS User table indexes for backup. Www.2cto.com 1. check that the index tablespace has the

SQL PLUS exports data to generate a text file to export data in a table to generate a text file, column and column are separated by "|" www.2cto.com SET echo OFFSET feedback OFFSET newpage noneSET pagesize 5000 SET linesize 500 SET verify OFFSET

PL/SQL data type and definition, value assignment Java code www.2cto.com 1. simple variable types and definitions SQL and pl/SQL common variable types: varchar2 (max_length) up to 4000 bytes char (max_length) Max 2000 bytes number (x, y) the

OCP question analysis _ 043: buffer cache and hit rate calculation method: www.2cto.com SELECT name, (1-(physical_reads/(db_block_gets + consistent_gets) * 100 H_RATIO FROM v $ ratio; the hit rate, as the standard for measuring the performance of

Oracle PL/SQL loop processing today is the loop iteration processing in Oracle, because many netizens have searched FOR the keyword "SQL FOR loop" from their blog statistics ", so I want to explain my understanding here. Www.2cto.com PL/SQL is also

Oracle execution plan table access operations this article records some table access operations www.2cto.com display the execution plan Stored Procedures refer http://www.bkjia.com/database/201303/192688.html (1) table access full table scan: use

Oracle Storage ManagementLogically, data is stored in segments (usually tables); physically, data is stored in datafiles. A table space entity is an image of the two. A table space may contain multiple segments and consists of multiple data files.

1. Download the oracle Instant Client (note: this is not a sqlplus customerEnd) http://www.oracle.com/technetwork/database/features/instant-client/index-097480.html. My local host is window7, so I chose to download the Instant Client for Microsoft

Estimate the index size (dbms_space.create_index_cost) before creating an index for a field in a table. The best way is to create an index in the test database for prediction.If no test environment is available, you can use

Oracle Data files shrink with the use of the database, the data files become larger and larger. Is there a way to squeeze out the relevant table from the block marked as free: www.2cto.com DBA_DATA_FILESDBA_DATA_FILES describes database files.

The difference between Connect, session, and process in Oracle: Session is called "session" in computers, especially in network applications ". Session: In computer terminology, Session refers to the time interval between an end user and the

In-depth introduction to oracle locks-principles: in modern multi-user multi-task systems, multiple users may access a shared object at the same time. This object may be a table, row, or memory structure, to solve the data security, integrity, and

ORACLE11g IMP-00058 problem today, the boss gave me a task to put four. the dmp file is imported into the oracle10G Database. I installed the 11G database on my local machine. If I didn't want it, I would just export it. Use the import table

Since ORACLE 9i, Oracle provides a Web-based graphical data management tool OracleOracle Enterprise Manager (Oracle Enterprise Manager) is used to manage databases instead of SQL commands. In Windows, OEMs are enabled by default and can be accessed