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. Usually called a «snapshot.»
Real-time — a environment that is real-time one for which particular tasks should be going to perform within a specified time interval. For a DBMS to be viewed undoubtedly real-time, it should be able to perform particular database-related tasks in an occasion which can be deterministically demonstratedвЂ”i.e., the case execution time that is worst may be demonstrated. Must be general-purpose DBMS relates to dynamic information where the sizes of tables differ in the long run, and because DBMS reaction times be determined by the total amount of information become prepared they are unable to 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 industry values connected with a record that is specific to an SQL row.
Record Type — an accumulation of closely associated information fieldsвЂ”equivalent to an SQL table. Much like a C struct, an archive kind is defined by a collection of closely associated information industries.
Referential Integrity — an ailment when the foreign key column values in every regarding the rows in one single dining table have actually matching rows within the referenced primary key table. Referential integrity is maintained by SQL throughout the processing of a INSERT and DELETE declaration and any UPDATE statement that modifies an international or primary key value.
Relational Model — A database by which inter-table relationships are arranged mainly through common information columns, which define a one-to-many relationship from a line for the main key dining table and another or even more rows of this matching international table that is key. Equi-joins relate tables which have matching primary/foreign values that are key but other evaluations (relationships) might be defined. Along with explaining the way the database tables are associated, the relational model additionally defines exactly how the associated information may be accessed and manipulated. SQL is one of widely used model database language that is relational. See Wikipedia
Remote Procedure Phone — an approach of interprocess interaction where a function residing within another procedure is known as as if it’s a regional (in-process) function. The strategy is implemented through a nearby proxy function and a stub function that is remote. Parameter values are marshalled right into a block of information that may be sent through the proxy towards the stub for demarshalling and calling the real function. Return values are prepared within the way that is same input values.
Replication — a procedure where selected changes in a master database is replicated (re-played) into another database.
Regulation Factor — Each expression that is relational into the WHEREIN clause of a question has an associated limitation component that is believed by the SQL optimizer, which specifies the small fraction (or portion) associated with the dining dining table which is why the phrase is going to be true. For instance, when you look at the query choose * from book where bookid = ‘austen013px’ the escort Dayton expression that is relational = ‘austen013px’ features a limitation element corresponding to .003 (only 1 away from 3213px rows will satisfy this phrase).
Result Set — the entire group of rows that is came back with A select that is particular statement.
Rollback — a surgical procedure, frequently done because of the SQL ROLLBACK statement, that discards all of the noticeable modifications produced by all INSERT, MODIFY and DELETE statements which were performed because the most recently started deal ( ag e.g., START DEAL declaration).
Line — One collection of relevant values for several regarding the columns declared in an offered dining dining table. Also referred to as a record incident.
Royalty — A License cost established in a Agreement (Product and Pricing Addendum).