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A COMMIT statement in SQL ends a transaction within a relational database management system (RDBMS) and makes all changes visible to other users. The general format is to issue a BEGIN WORK (or BEGIN TRANSACTION , depending on the database vendor) statement, one or more SQL statements, and then the COMMIT statement.
A database trigger is procedural code that is automatically executed in response to certain events on a particular table or view in a database. The trigger is mostly used for maintaining the integrity of the information on the database. For example, when a new record (representing a new worker) is added to the employees table, new records ...
Hash database access method head: Text processing Mandatory Copy the first part of files PWB UNIX [citation needed] iconv: Text processing Mandatory Codeset conversion HP-UX id: Misc Mandatory Return user identity System V ipcrm: Misc Optional (XSI) Remove a message queue, semaphore set, or shared memory segment identifier System V ipcs: Misc ...
Part of the transaction log containing transactions completed by COMMIT or ROLLBACK. Because all relational databases contains, by definition, a transaction log (most of the time based on the [ARIES algorithm [Algorithms for Recovery and Isolation Exploiting Semantics]]), the log, which is a binary file, is divided into three parts, sequentially:
A database transaction symbolizes a unit of work, performed within a database management system (or similar system) against a database, that is treated in a coherent and reliable way independent of other transactions. A transaction generally represents any change in a database. Transactions in a database environment have two main purposes:
Commit (data management), a set of permanent changes in a database; COMMIT (SQL), an SQL statement used to create such a changeset; Version control.
In a distributed database system, a transaction could execute its operations at multiple sites. Since atomicity requires every distributed transaction to be atomic, the transaction must have the same fate (commit or abort) at every site. In case of network partitioning, sites are partitioned and the partitions may not be able to communicate ...
Commit/Rollback: If there is no conflict, make all changes take effect. If there is a conflict, resolve it, typically by aborting the transaction, although other resolution schemes are possible. If there is a conflict, resolve it, typically by aborting the transaction, although other resolution schemes are possible.