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 the data that are same. Often known as a “snapshot.”
Real-time – a environment that is real-time one by which certain tasks needs to be assured to perform in just a specified time period. For the DBMS to be looked at really real-time, it should be in a position to perform particular database-related tasks in a period that may be deterministically demonstratedвЂ”i.e., the case execution time that is worst may be demonstrated. Just because a general-purpose DBMS addresses dynamic information where the sizes of tables differ with time, and because DBMS reaction times be determined by the total amount of information become prepared they can’t be viewed real-time. This will be real additionally for RDM. It really is real-time friendly, since it is fast, has a tiny impact and has now features (such as for instance virtual tables and in-memory storage space) that enable that it is found in useful means in a real-time application.
Record Instance/Occurrence – One group of associated information industry values related to a record that is specific to an SQL row.
Record Type – an accumulation of closely associated information fieldsвЂ”equivalent to an SQL table. Just like a C struct, accurate documentation kind is defined by a collection of closely related information industries.
Referential Integrity – an ailment where the international key column values in most of this rows in a single dining table have actually matching rows when you look at the referenced primary key table. Referential integrity is maintained by SQL through the processing of a INSERT and DELETE declaration and any UPDATE statement that modifies an international or primary value that is key.
Relational Model – A database for which inter-table relationships are arranged primarily through typical information columns, which define a one-to-many relationship from a line regarding the main key dining dining table and something or higher rows regarding the matching foreign table that is key. Equi-joins relate tables that have matching primary/foreign values that are key but other evaluations (relationships) Baptist dating might be defined. Along with describing the way the database tables are associated, the model that is relational describes exactly how the associated information are accessed and manipulated. SQL is considered the most widely used relational model database language. See Wikipedia
Remote Procedure Call – an approach of interprocess interaction where a function living within another process is named as if it really is a regional (in-process) function. The strategy is implemented through a nearby proxy function and a remote stub function. Parameter values are marshalled as 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 into the way that is same input values.
Replication – a procedure where chosen adjustments in a master database is replicated re-played that is( into another database.
Regulation Factor – Each relational phrase specified when you look at the WHEREIN clause of a question posseses an associated limitation component that is believed because of the SQL optimizer, which specifies the fraction (or portion) for the dining table for which the expression will likely be real. As an example, within the query select * from book where bookid = ‘austen013px’ the relational phrase bookid = ‘austen013px’ features a restriction element corresponding to .003 (just one away from 3213px rows will satisfy this phrase).
Result Set – the entire pair of rows this is certainly came back by a specific choose statement.
Rollback – a procedure, often done by the SQL ROLLBACK statement, that discards all the noticeable modifications created by all INSERT, IMPROVE and DELETE statements which were performed because the most recently started deal ( ag e.g., BEGIN DEAL declaration).
Line – One pair of associated values for several for the columns declared in an offered table. Also referred to as an archive event.
Royalty – A License cost established in a Agreement (Product and Pricing Addendum).