Oracle

Oracle rman nocatalog and catalog 1. Check whether archive mode is Enabled [oracle @ test ~] $ Sqlplus/as sysdbaSQL * Plus: Release 10.2.0.1.0-Production on Wednesday April 17 03:15:57 2013 Copyright (c) 1982,200 5, Oracle. all rights reserved.

Oracle --- knowledge point test 1. create a table employee with the following fields: Id number (4), First_Name varchar2 (20), last_Name varchar2 (20), mgrid NUMBER (4), Job varchar2 (20 ), salary number (7,2) [SQL] create table employee (Id number (

Summary of recently used databases: Recently, due to a special project, it is necessary to adapt to different data types, such as oracle, mysql, and mssql. Make a simple comparison between the three databases, as shown in the following figure:

There is a simple requirement for regular oracle Data Backup: the oracle database is placed on host-a, and I want to back up host-a to specify oracle table data at host-B at every morning. Step 1. Install the oracle environment or oracle instant

Oracle 10g rman backup and recovery II. nocatalog backup archivelogbackup database plus archivelog delete input backup data file, control file, parameter file, archive log file, and then delete the archived log files.) backup tablespace users

Use SQL to manage tablespaces, users, and authorization SQL code -- CREATE TABLESPACE CRMDB DATAFILE '/opt/oracle/app/oradata/testdb/crm. dbf 'size 500 m autoextend on next 100 M; -- create user CRM identified by password default tablespace CRMDB; --

SQL indexes are not used. 1. The query predicate does not use the primary boundary of the index, which may lead to the absence of the index. For example, you are querying SELECT * from t where y = XXX; if your T table has a composite index

In Oracle, The wm_concat function reports an error. solution: the original SQL statement select t. mail_no, wm_concat (t. notice_no) as notice_no_all from ardba. arbino t group by t. the mail_no error message solves SQL select. mail_no, wm_concat (.

Oracle full-text index optimization like a recent service, which was originally called, but a new problem has emerged. Two LIKE '% XXX %' are found, and this is heartbroken, the table record is about million now, full table scan, your sister's. In

How to debug Type in ORACLE databases is generally difficult to debug when ORACLE needs to debug the TYPE and LIST sets of stored procedure parameters. Now we use a simple method to show the TYPE code Java code -- subtype create or replace type

Common commands for oracle 11g RAC Management 1) Check cluster status: [grid @ rac02 ~] $ Crsctl check cluster CRS-4537: Cluster Ready Services is online CRS-4529: Cluster Synchronization Services is online CRS-4533: Event Manager is online 2), all

Cancel character function replace | substr | translate Oracle. A three-character function commonly used in Oracle. 1. substr SUBSTR (c1, n1 [, n2]) intercepts a string of the specified length. N1 = start length; n2 = String Length. If it is null, It

Oracle D_FILE.PUT & FND_FILE.PUT_LINE FND_FILE can be used to write into FND_FILE.PUT (which in number, buff IN VARCHAR2); Use this procedure to write text to a file (without a new line character ). multiple callto FND_FILE.PUT will produce

Oracle extract () intercepts the time value function SQL code // The extract () function in oracle is introduced from oracle 9i, it is used to extract a specific part from a date or interval type. // The syntax is as follows: EXTRACT ({YEAR | MONTH |

Oracle All about profile 1. Purpose: The profile in the Oracle system can be used to restrict the database resources that users can use. Use the Create Profile command to Create a Profile, it is used to restrict the use of database resources. If the

Oracle finds records with the same data in several fields in the table [SQL] create table student (id number primary key, name varchar2 (20), gender varchar2 (2); create table student, contains two main fields: name and gender. insert several data

The three major advantages of Oracle performance adjustment are ASH, AWR, and addm ash (Active Session History). Based on the V $ SESSION, the ASH sample is performed once per second to record the event waiting for the Active Session. Non-active

[Oracle] a case of increasing SQL Performance by adding local partition indexes received help from colleagues today, saying that a select query would take more than one minute on Oracle, he hopes to get results within 5s. The SQL statement is as

Effect of null values on Sorting in oracle solution: Method 1: Use nvl function Syntax: Nvl (expr1, expr2) If EXPR1 is NULL, EXPR2 is returned, otherwise, EXPR1. select name, NVL (TO_CHAR (COMM), 'not application') FROM TABLE1 are returned. Once you

Oracle login. SQL statement -- Define the buffer editor as videfine_editor = vi -- make DBMS_OUTPUT valid and set it to the maximum buffer, and prevent "eat" from leading spaces set serveroutput on size 1000000 format wrapped -- set the number of