RDM Server – Raima’s client/server DBMS originally released in 1993, called RDS (Raima Database Server), Velocis, and lastly RDM Server. Nevertheless supported for current clients.
Read-only deal – A Multi-Version Concurrency Control (MVCC) feature that enables database information become read by one procedure without blocking another procedure’s modification of this exact same information. Often known as a “snapshot https://datingmentor.org/420-dating/.”
Real-time – a environment that is real-time one by which particular tasks should be going to perform within a specified time period. For the DBMS to be looked at undoubtedly real-time, it should be in a position to perform particular database-related tasks in an occasion that may be deterministically demonstratedвЂ”i.e., the case execution time that is worst is demonstrated. Just because a general-purpose DBMS relates to dynamic information in that the sizes of tables differ in the long run, and since DBMS reaction times be determined by the total amount of information become prepared they can not be looked at real-time. This really is real additionally for RDM. It really is real-time friendly, it to be used in beneficial ways in a real-time application because it is fast, has a small footprint and has features (such as virtual tables and in-memory storage) that allow.
Record Instance/Occurrence – One group of associated information field values connected with a certain record typeвЂ”equivalent to an SQL row.
Record Type – an accumulation closely associated information fieldsвЂ”equivalent to an SQL table. Comparable to a C struct, an archive kind is defined by a couple of closely associated information areas.
Referential Integrity – an ailment when the international key column values in every associated with rows in one dining dining table have actually matching rows into the referenced primary table that is key. Referential integrity is maintained by SQL through the processing of a INSERT and DELETE declaration and any UPDATE statement that modifies a foreign or primary key value.
Relational Model – A database by which inter-table relationships are organized mainly through typical information columns, which define a one-to-many relationship between a line associated with the main key dining dining table and another or higher rows associated with matching international table that is key. Equi-joins relate tables which have matching primary/foreign values that are key but other evaluations (relationships) could be defined. Along with describing the way the database tables are related, the relational model also defines just exactly how the associated information are accessed and manipulated. SQL is considered the most widely used model database language that is relational. See Wikipedia
Remote Procedure Phone – an approach of interprocess interaction the place where a function living within another procedure is named as though it really is a regional (in-process) function. The technique is implemented through a nearby proxy function and a stub function that is remote. Parameter values are marshalled right into a block of information which can be sent through the proxy to your stub for demarshalling and calling the function that is actual. Return values are prepared within the way that is same input values.
Replication – a process where chosen customizations in a master database is replicated (re-played) into another database.
Restriction Factor – Each relational phrase specified when you look at the WHEREIN clause of a question posseses an associated limitation component that is approximated by the SQL optimizer, which specifies the small small fraction (or portion) regarding the dining dining dining table which is why the expression may be real. As an example, within the query choose * from book where bookid = ‘austen013px’ the relational phrase bookid = ‘austen013px’ features a limitation element corresponding to .003 (only 1 away from 3213px rows will satisfy this phrase).
Result Set – the whole pair of rows this is certainly came back by a particular choose statement.
Rollback – a surgical procedure, often done by the SQL ROLLBACK statement, that discards all the noticeable modifications created by all INSERT, MODIFY and DELETE statements which were executed considering that the most recently started deal ( ag e.g., BEGIN DEAL declaration).
Line – One pair of associated values for many associated with the columns declared in a provided dining dining table. Also called an archive incident.
Royalty – A License charge set forth in a Agreement (Product and Pricing Addendum).