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  2. Schema evolution - Wikipedia

    en.wikipedia.org/wiki/Schema_evolution

    The problem is not limited to the modification of the schema. It, in fact, affects the data stored under the given schema and the queries (and thus the applications) posed on that schema. A database design is sometimes created as a "as of now" instance and thus schema evolution is not considered.

  3. Wikipedia:Deferred changes/Implementation - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Deferred_changes/...

    A deferred page is recorded in the database with a "defer" level, and whenever an edit to a page with "defer" level is reviewed, the config is reset. So this implements the "defer until reviewed" concept. No change in the db schema is needed. For AbuseFilter, two custom actions are added to defer passively or actively.

  4. Schema migration - Wikipedia

    en.wikipedia.org/wiki/Schema_migration

    Applying a schema migration to a production database is always a risk. Development and test databases tend to be smaller and cleaner. The data in them is better understood or, if everything else fails, the amount of data is small enough for a human to process. Production databases are usually huge, old and full of surprises.

  5. Consistency (database systems) - Wikipedia

    en.wikipedia.org/wiki/Consistency_(database_systems)

    In database systems, consistency (or correctness) refers to the requirement that any given database transaction must change affected data only in allowed ways. Any data written to the database must be valid according to all defined rules, including constraints, cascades, triggers, and any combination thereof. This does not guarantee correctness ...

  6. Gale–Shapley algorithm - Wikipedia

    en.wikipedia.org/wiki/Gale–Shapley_algorithm

    A form of the Gale–Shapley algorithm, performed through a real-world protocol rather than calculated on computers, has been used for coordinating higher education admissions in France since 2018, through the Parcoursup system. In this process, over the course of the summer before the start of school, applicants receive offers of admission ...

  7. Database theory - Wikipedia

    en.wikipedia.org/wiki/Database_theory

    Database theory encapsulates a broad range of topics related to the study and research of the theoretical realm of databases and database management systems.. Theoretical aspects of data management include, among other areas, the foundations of query languages, computational complexity and expressive power of queries, finite model theory, database design theory, dependency theory, foundations ...

  8. Student loan forbearance vs. deferment: Key differences and ...

    www.aol.com/finance/student-loan-forbearance-vs...

    Almost 43 million Americans carry student loan debt. Forbearance and deferment are two ways borrowers can freeze their payments. Here are some factors to consider before requesting either one.

  9. Wikipedia:Deferred revisions - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Deferred_revisions

    Deferred revisions are listed at Special:PendingChanges with other pending edits. In order to inform reviewers of the specific situation, the pending changes protection log which can be displayed optionally when reviewing revisions could be always displayed by default, and the log summary given by the edit filter could display the name and ...