Oracle

When oracle was installed, the machine name was host = user49561.After modification, start the oracletnslisener service in the control panel service and immediately stopUse the command line tool instead:LSNRCTLStartTip: Tnslsnr for 32-bit windows:

In addition to sysaux's neglected damage to the database during the National Day upgrade, some problems have been found, which are roughly divided into the following points:1. EXP/expdp is not available because many packages and functions are not

Use oledbconnection. getoledbschematable (oledbschemaguid. columns, new object [] {null, schemaname, tablename, null}) when obtaining the schema information of a column, the returned datatable column is "data_type ", is to use a number to identify

From the Microsoft Dynamics Chinese community http://www.mbscn.net/viewarticle.php? Id = 846 The original post is as follows: ConsultAxaptaAndSAP,OracleWhat are the disadvantages of comparison? [Help] Younger brother has been engaged in the

The Enterprise Library of Enterprise Library does not provide an SQL script to record logs to the Oracle database. To enable logging to the Oracle database, write the following script: spool DDD.logpromptprompt Creating table ORACLE_ENTLOGprompt ====

Latch is a lightweight serial locking mechanism used to protect the Oracle shared memory structure and ensure consistency of concurrent user operations. For example, various data in SGA is repeatedly read from the disk to the memory, it is

Author: eygle link: http://www.eygle.com/archives/2011/02/oracle_asmlib_support.html Since the launch of Oracle Linux 6, many users are eager to try. In Linux 6, a change in asmlib has been published on Metalink. See Metalink note1089399.1. Oracle

1. In a project, run the top SQL script in PL/SQL:-- Usage FrequencySelect SQL _text, executions, sysdateFrom (select SQL _text,Executions,Rank () over (OrderBy executions DESC) exec_rankFrom v $ SQL)Where exec_rank Create a crontab and run the

List all configured Databases [Root @ node1 ~] # Srvctl config DatabaseNovadb Status of all instances and services [Root @ node1 ~] # Srvctl status database-D novadbInstance novadb1 is running on node node1Instance novadb2 is running on node

Oracle has poor performance. Check the hardware configuration of the database server first. Including memory parameter adjustment. After Oracle9i, you can check the memory and pool size in the Enterprise Manager routine-configuration-memory, and set

Oracle logical read and physical read1. Physical reading is the process of reading data from the disk to buffer catch.Generally, if you find that the data does not exist in buffer catch when you need the data, that is, Oracle performs physical

Document directory Nvl Decode Function Decode is an exclusive function provided by Oracle. It is a powerful function. Although it is not an SQLStandard, but very useful for performance. Up to now, other database vendors have not yet provided

Keywords: ASP. NET, Oracle, database connection pool, performance bottleneck Abstract: This article introduces the performance bottleneck caused by connection pool problems in connecting Oracle to Asp.net and the solution through a case I have

[Original] common Oracle hint usage 1./* + all_rows */It indicates that the overhead-based optimization method is selected for the statement block, and the optimal throughput is obtained to minimize the resource consumption.For example:Select/* +

1. Partition the diskFdisk-l view disk statusFdisk/dev/SDB partitioning 2. Configure bare devices (modify the/etc/udev/rules. d/60-raw.rules file)In redhat51) Load bare DevicesAction = "add", kernel = "/dev/sdb1", run + = "/bin/raw/dev/raw/raw1%

 Note: This example is transferred from the DBA diary of the old white.   Just as I sat down, the phone rang. A customer called me and said it was a strange problem. In a large table with tens of millions of records, select * from where rownum   --

  For DBAs, these two commands are no stranger. You can use these two commands to collect table statistics. This article mainly looks at the differences between the two commands.   For more information, see: Oracle analyze command

= [Static registration] = static registration can be configured through a graphical net manager. the configuration options in the net manager correspond to relevant files: Summary File sqlnet. ora service name tnsnames. ora listener listener.

  In Oracle10g, if the installation example is not selected during instance creation, you can create an instance using the script under $ ORACLE_HOME/demo/Schema after the instance is created. For details about the creation method, the official

A few days ago, Roger's blog updated an article, which defines the dbms_rowid package. Oracle packages are all encrypted using wrap. Someone on itpub studied unwrap and published some code to implement unwrap. For more information about wrap and