Oracle

There are friends. data file header error ORA-01122 and ORA-01210 error, the database is not normal open. Because the platform is win, they seek me to consult win bbed, because the home computer did not bring, can not provide win bbed. I passed

1, create a query Oracle SQL script file, named Cx.sql, which defines three variables Last_date Yesterday's timeToday: the time of dayfile_name: Exported filename&1, &2, &3 represent the three arguments that are passed to the shell script that is

In some cases, may be due to misoperation, not small first drop diskgroup, this time do not be nervous, such a failure, can be a perfect recovery through kfed (data 0 lost). If the related ASM disk is further damaged, then the subsequent recovery is

One, what is the Oracle character set The Oracle character set is based on a certain character encoding scheme, which assigns a set of different numerical codes to a specific group of symbols. The most important parameter that affects the Oracle

A typical ORALCE directory structure is as follows: /u01└──oracle├──admin (Database Admin file location, with instance partitioning)│├──mydb││├──adump (Audit information)││├──bdump (Background process tracking file)││├──cdump (Info dump file core

--Date related functions--1.day (Date_time), returns an integer that represents the day in the datepart of the specified date. Month (date_time), year (date_time) similarSELECT Day (GETDATE ())--returns 23--2.datepart (Datepart,date) that returns

Sqlplus /as SYSDBA --View DBF storage locationSELECT * from Dba_data_files; --View File location SELECT * from Dba_directories;--New Table spaceCreate tablespace bp_oracle logging datafile '/u02/oradata/devdb/bp_oracle.dbf ' size 100m autoextend

Today, in the investigation of the original code encountered a mistake, prompted the "select が@@facesymbol@@ 郡 skewer rdquo, baffled by the solution." Later foundIt's the "DISTINCT" keyword that's haunting you. My original SQL statement

How to change the location of an Oracle data file A: In archive mode 1. In Sqlplus, connect to the Oracle database where you want to move the file, and then execute the following SQL statement to view the location of the Oracle database file: Sql>

Example: test.sh The code is as follows Copy Code #! /bin/shSqlplus-s scott/tigerSet head offSet Linesize 20000Set echo offSet Feedback offSet pagesize 0Set Termout offSet Trimout onSet Trimspool

Oracle's data dictionary is one of the most important components of the database tutorial, which arises as the database is generated and changes as the database changes, Some tables and views are reflected under the SYS user. The data dictionary

There are many useful functions in the Oracle function library, such as Nvl,sign,round, which use more, the function is larger or decode this function. The use of this function is as follows: Decode (expression, condition 1, result 1, condition 2,

A Set the appropriate SGA People often complain that server hardware is good, but Oracle is slow. It is likely that the memory allocation is unreasonable. (1) Assuming that the memory has 512M, this is usually a small application. Oracle's SGA is

Customer has a 11g active Dataguard library, the MRP process stopped, see Alertlog, you can see the error about Ora-7445[kdxlin]: Cat Alert*.log .... Exception [Type:sigseov,address not mapped to object] [ADDR:0XC] | Pc:0x96504c7,kdxlin () +415

The operations of the unused column and drop column are essentially different, and the unused makes the SQL inaccessible to column by changing the data dictionary's information, and the drop is changed directly at the physical data layer. The

Always use Hibernate+mysql, I feel Hibernate is very useful, but also out of what big problem; This week, the company's products to be deployed to orecle, although the product claims to support Oracle But I know that this product has not been

In RAC of 12c, because it is a flex cluster, the instance runs randomly. For example, instance 3 runs on Node 2 and instance 2 runs on Node 3. This is also true after restart.We can handle this in this way, so that the original running instance is

This is a netizen problem, 10201 windows environment, non-archive, no backup, common ORA-00600 4193 error reported when the database is open.This error is very common and we have analyzed it many times. Here we will look at the situation of netizens

After installation in Linux, you must manually start and close the database (dbstart | dbshut), listener (lsnrctl), and console (emtcl) each time ). How can I add Oracle to a Linux system service and start it on its own? The following uses CentOS 6.3

** Environment description **Oracle Database ServerOperating system: CentOSIP: 192.168.150.214Port 1521SID: orclOracle Database version: Oracle11gR2User: ts password: ts** The detailed procedure is as follows **1. Log on to the server as the root