Oracle

Problem: When you start the service on the control panel, the following error occurs: Service: The OracleOraDb10g_home1TNSListener service cannot be started on the local computer. Error 3: The specified path cannot be found. Check the properties

Bbed is short for block browse block edit. It is a tool used to directly view and modify data files. This tool is not provided on windows. on linux, compilation is required: Db2-> cd/opt/oracle/product/11.0.13/rdbms/libB2-> make-f ins_rdbms.mk $

I. Backup is divided into physical backup and logical backup. 1. Physical backup is a backup of physical files (including data files, control files, and redo log files. Physical backup is further divided into hot backup/online backup and cold

How can I close an Oracle database? The following describes the three most common methods for shutting down an Oracle database. 1. Close normally The option used to close the database normally is normal. Before the database is closed, all

Note: N indicates the numeric type, C indicates the numeric type, D indicates the date type, [] indicates that parameters can be ignored, and fmt indicates the format. A single value function returns a single value in a query. It can be applied to

Database Synchronization is often used in the project process. Now, we paste the synchronization process of a project that was previously created for your reference!This document is completed in the following steps:1. Environment configuration

The _ sort_elimination_cost_ratio parameter of Oracle CBO shows several optimization cases related to the implicit parameter _ sort_elimination_cost_ratio of Oracle optimizer (Refer ). If _ SORT_ELIMINATION_COST_RATIO is used as the keyword to query

Full Oracle exercise PS: All Tables come from the tables of SCOTT users in Oracle, and should be known to beginners. I deleted the SMITH of the emp table without rollback, so the results may be slightly different. 1. SELECT * FROM emp WHERE deptno =

[Oracle] Data Guard CPU/PSU patch installation tutorial Data Guard requires both Primary and Standby to be patched, so the steps are more complex. The main steps are as follows: Stop the log transmission service in Primary; shut down the Standby

Common Oracle script-uninstall RAC [Python] #! /Bin/bash #0. env varible #1. delete some file rm-f/etc/init. d/init.css d rm-f/etc/init. d/init. crs rm-f/etc/init. d/init. crsd rm-f/etc/init. d/init. evmd rm-f/etc/rc2.d/K96init. crs

Startup, startup mount, and startup nomount are different startup nomount options: (read the initialization parameter file and start the instance) startup nomount option to start the instance, but do not install the database. When the database is

Oracle analysis table and Index analyze table tablename compute statistics;analyze index indexname compute statistics;  It is good for using CBO. You can use more reliable table information, so that the execution plan can be more accurate. In 10 Gb,

ORA-28575: Unable to open the RPC connection with the external process agent solution 1. Modify the listener. ora file, add the following content, note that the Library is located in the bin directory under the SDE installation directory: (ENVS =

"The input value is not long enough in the date format" reported in Oracle for date conversion" [sql] select (select j.jgmc from t_zzjg j where j.jgdm = t.jgdm) jgmc, t.jgdm, sum(t.jcj) jcj, sum(t.sa) sa, sum(t.la) la,

Oracle-user-managed backup (1) I. first, you must know the table space and file information in the database. There are several performance views: v $ datafile, v $ tablespace, v $ tempfile, v $ logfile, v $ controlfile, dba_tablespaces,

Oralce index clustering factor SQL code -- test preparation FOR aggregation factor: -- CREATE two orders and unordered tables, create table T_COLOCATED (id number, COL2 VARCHAR2 (100); begin for I IN 1 .. 100000 loop insert into T_COLOCATED (ID, COL2

Oracle notes Collection (1) User: Username: scott password: tiger login: sqlplus scott/tiger exit: exit to view the tables of the current user: select * from tab; ===============================display the current user SQL> show userUSER as "SYS"

Oracle Patch and opatch tool Introduction 1. a cpu (Critical Patch Update) contains fixes for multiple security vulnerabilities and patches for required non-security vulnerabilities. CPU usage is cumulative. You only need to install the latest CPU,

The following shell script is used to import data from a database to HDFS using SQOOP: # Oracle connection string, which contains the Oracle address, SID, and port CONNECTURL = jdbc: oracle: thin: @ 20.135.60.21: 1521: DWRAC2 # username used: Export

[Oracle]-[insert read sequence]-sequence relationship between insert reads: is the sequence of Oracle insert records read? Through a simple experiment: SQL> create table t( x int,a char(2000) default 'x',b char(2000) default 'x',c char(2000) default