reloading database

Database model (ID-PID): A father has many children, and a child has only one father, such a structure is a tree. In a database table, the ID and PID (parent_id) are designed. A tree is stored by ID and PID. From the object-oriented design point of view, in the tree node class is not suitable for PID, a node has 1 or 0 fathers, and 0 or children. So the design is as follows: This is an organizational struct

As an Exchange administrator, when managing an Exchange server, there are a number of problems, such as a large log, an excessive Exchange database file, and so on, and recently found that some administrators proposed that the STM file is too large to deal with? Some netizens suggest removing the. stm file, and the Exchange re-related service will produce a new. stm file, which, while it may be, is not recommended, even if you have made a backup befor

, communication interruption, consistency error, error 823, 824, 825 and so on the repair;Support SQL database file is due to hard disk damage or bad channel and data recovery, unable to attach the repair;Support Manual repair Table Data Association complex third-party application repair, such as UF, Kingdee, speed up, housekeeper, Ding Jie Ekaterina, proud Peng Software, new page software, extension software and so on.Support for SQL

MSSQL Server 2005 Restore Database Bak files, Web sites using Virtual host site will often encounter, in general, the host has an online management program, but sometimes not, you need to restore the local backup SQL database. In this case, MSSQL Server 2008 will also appear, sometimes the "backup set of database backup and the existing XX

The difference between spring transaction and database database transaction When you do not use a transaction, the method that invokes the hibernatetemplate immediately commits the transaction. And after using the transaction, after you have configured the method of the class to commit the transaction, if a method of multiple inserts, modifications or deletions at the same time , will be unified to commi

Oracle's commit is to submit the data, before you commit the previous operation, the update is memory, not updated to the physical file. So you shut down the database without a commit, and the data in the database is not updated. Commit is submitted against: DMLDML (data manipulation Language) requires submission, which is part of data management operations, such as insert (insert), Update (modify), delete

! Please READ each STEP carefully! In order to log into MariaDB to secure it, we'll need the CurrentPassword for the root user. If you ' ve just installed MariaDB, Andyou Haven ' t set the root password yet, the password would be a blank,so you should just Press ENTER here. Enter current password to root (enter for none):The current database password is empty, hit enter directly. OK, successfully used password, moving on ... Setting The root password

Attachment database, the old problem, and later found a solution on the internet, recorded. The following is reproduced from the network: After consulting the data, found that is not a file read-only problem, strictly speaking should be a "permission" problem, the current SQL Server login account does not have to attach files to write permission, there will be the above "read-only" hint, the solution has the following several ways: 1. Copy th

English Database Interpretation Database Design Vocabulary Comparison1. Access method (Access Methods): This step includes storing and retrieving records from a file.2. Alias: Another name for a property. In SQL, you can replace the table name with an alias.3. Alternate keys (alternate key, er/relational model): There is no candidate key in the entity/table that is selected as the primary health.4. Anomali

In reality, mysql is usually a master-slave multi-slave database, but the problem occurs in the master database. it needs to be upgraded from the master database to the master database, but in fact this operation is very complicated, basically, all slave databases must be operated. In this case, you may want to make my

Comprehensive Mysql database, database table, basic data operation notes (including code), mysql database Mysql database, database table, and basic data operation notes are shared with you for your reference. The specific content is as follows: I.

MYSQL database data splitting-database/table sharding summary, mysql database sharding Data storage evolution 1: single database, single table Single Database, single table is the most common database design. For example, if a use

found a database on the Internet, in their own SQL Server 2008 R2 restore, there is an error, it seems that the version is different. The restore was unsuccessful, the database was canceled, but it was in a "suspicious" state and could not be viewed and used. Some repair operations are also useless. when the database is online, the error comes out. (You ca

Scenario One: (Don't change too much My.ini file) Copy the database from the original database a ib_logfile1 ib_logfile0 ibdata1; Close the destination database B; Backup destination database b ib_logfile1 ib_logfile0 ibdata1 three files to prevent the database