Database Administrator

ORA-02049: Timeout: Distributed Transaction Processing wait lock Simulation I want to simulate this error and see what the problem is. Create a table on Oracle Database B: Create table TEST(A number,B DATE);Insert into test (A, B) values (2, to_date

Oracle common table-> Partition Table conversion (0.9 billion data volume) Background: Environment: Linux 5.5 + Oracle 10.2.0.4 A common table T has no partitions due to improper preliminary design. Now, the data volume has reached more than 0.9

Re-build the failed index and the invalid Index If an index is invalid in the database, a large number of full table scans occur for the operations on the table where the index is located because of the index. This consumes a lot of resources,

Mha vip switch script and mhavip Switch MHA can ~ Automatic Fault Detection and Failover within 30 seconds, suitable for high availability and high data integrity requirements. To achieve seamless switching, you also need to rely on VIP drift. The

Select from update row implementation, updaterow At the DTCC conference, Alibaba's speech mentioned: select from update hot row; I don't understand how to implement it in Oracle. It means to implement the update and select update field information

Mongoose implements DBRef to search for all subclass information, mongoosedbref Product table var Mongoose = require('mongoose');var Schema = Mongoose.Schema;var Product = new Schema({ image : { type : String },

MySQL can be connected locally, and the remote connection fails. I have encountered the problem that MySQL can be connected locally but cannot be connected remotely. I have not recorded the problem. I encountered this problem on the new server

Analysis of HWM and swot analysisThe following describes HWM in combination with official documents and experiments:The following is an English Excerpt from the 11gR2 official document:HWM (high water mark): The boundary between used and unused

Mongoose getting started with mongooseNo matter what database you use as the db service, connect is an essential step. Method 1: @ Param {String} uri @ param {Object} options @ param {Function} callbackconnect (uri, [options], [callbakc]) returns

[LeetCode] Duplicate Emails, solution report, leetcodeemails Directory Directory Question Solutions AC SQL Question Write a SQL query to find all duplicate emails in a table named Person. Id Email 1 A@ B .com

Spring annotation configuration Transaction Management-problems, spring annotation configuration transactions Configure in the context: Note: 1. If the configuration is complete, an error is returned -- java.lang.NoSuchMethodError:

How to operate JGeometry object 2 and spatialjgeometry provided by Oracle Spatial in the back-end JSP file I have written an article to record some of the problems I encountered. This time I updated my new host and encountered some problems. Now I

Error: 1130-host... is not allowed to connect to this MySql server, 1130-hostallowed Solution: 1. Change the table. It may be that your account is not allowed to log on remotely, but only on localhost. At this time, you only need to log in to mysql

PL/SQL _ Developer _ the export tool is not recognized. pldeveloper Original Works are from the blog of "Deep Blue blog". You are welcome to reprint them. Please note the following source when reprinting them. Otherwise, you will be held legally

How to diagnose the error time returned by sysdate in rac, racsysdateRecently, some rac environments have been used to access sysdate and return the error time. This problem often occurs when the database link is created through Listener, and, in

MHA installation and equivalence configuration, mha Configuration MHA consists of MHA nodes (which can be understood as subnodes) and MHA management nodes. Therefore, MHA installation is divided into two parts: Install MHA nodes and install MHA

Use military rules for mysql_db organized by the Department and sort out military rules for mysql_dbMysql_db military rules: 1. Developers and testers are prohibited from manually deleting and modifying data in the IDC environment.   2. Submit all

Differences between InnoDB and MyISAM In the Mysql storage engine (network arrangement), innodbmyisam1,Transaction Processing innodb supports the transaction function, which is not supported by myisam. Myisam is faster and has better performance.2.

[Mysql] Create a database and develop the encoding, mysql Encoding Currently, many orm tables are used, and many mysql tables do not need to be created by themselves. However, the database must be created by itself, and the SQL statements

ORACLE 11G traverses the cursor in the stored procedure, calls the scheduled execution of job tasks, and 11 gjob Cursor traversal and scheduled job execution in ORACLE stored procedures  1. First, use the For Loop For Loop is a simple and practical