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Mimer SQL is a DBMS that only implements optimistic concurrency control. [10] Google App Engine data store uses OCC. [11] The Apache Solr search engine supports OCC via the _version_ field. [12] The Elasticsearch search engine updates its documents via OCC. Each version of a document is assigned a sequence number, and newer versions receive ...
Oracle Reports is a tool for developing reports against data stored in an Oracle database. Oracle Reports consists of Oracle Reports Developer (a component of the Oracle Developer Suite ) and Oracle Application Server Reports Services (a component of the Oracle Application Server ).
Graphical interfaces from Oracle or third parties have diminished the proportion of Oracle database end-users who depend on the SQL Plus environment. Oracle shops typically continue to use SQL Plus scripts for batch updating or simple reports.
In the monoid (,) of the natural numbers with multiplication, only and are idempotent. Indeed, = and =. In the monoid (, +) of the natural numbers with addition, only is idempotent.
SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd [12] in the early 1970s. [13] This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored in IBM's original quasirelational database management system, System R, which a group at IBM San ...
SQL*ReportWriter, used for developer reports Both tools were character-based and there was some integration between the two although they were sold as separate products. The developer interface became more similar over time and they were eventually bundled together as a single product named Oracle CDE (Cooperative Development Environment).
Multiversion concurrency control (MCC or MVCC), is a non-locking concurrency control method commonly used by database management systems to provide concurrent access to the database and in programming languages to implement transactional memory. [1]
Eventual consistency is a consistency model used in distributed computing to achieve high availability.Put simply: if no new updates are made to a given data item, eventually all accesses to that item will return the last updated value. [1]