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  2. Database schema - Wikipedia

    en.wikipedia.org/wiki/Database_schema

    The database schema is the structure of a database described in a formal language supported typically by a relational database management system (RDBMS). The term " schema " refers to the organization of data as a blueprint of how the database is constructed (divided into database tables in the case of relational databases ).

  3. Lightweight Directory Access Protocol - Wikipedia

    en.wikipedia.org/wiki/Lightweight_Directory...

    A server holds a subtree starting from a specific entry, e.g. "dc=example,dc=com" and its children. Servers may also hold references to other servers, so an attempt to access "ou=department,dc=example,dc=com" could return a referral or continuation reference to a server that holds that part of the directory tree. The client can then contact the ...

  4. Naming Context - Wikipedia

    en.wikipedia.org/wiki/Naming_Context

    Description of the naming context. Active Directory can support tens of millions of objects. To scale up those objects, the Active Directory database is divided up into partitions for replication and administration. Each logical partition replicates its changes separately among domain controllers in the forest. Some directory partitions store ...

  5. Active Directory - Wikipedia

    en.wikipedia.org/wiki/Active_Directory

    Active Directory (AD) is a directory service developed by Microsoft for Windows domain networks. Windows Server operating systems include it as a set of processes and services. [1][2] Originally, only centralized domain management used Active Directory. However, it ultimately became an umbrella title for various directory-based identity-related ...

  6. Entity–relationship model - Wikipedia

    en.wikipedia.org/wiki/Entity–relationship_model

    Entity–relationship model. An entity–attribute-relationship diagram for an MMORPG using Chen's notation. An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types (which classify the things of interest) and specifies relationships ...

  7. Information schema - Wikipedia

    en.wikipedia.org/wiki/Information_schema

    In relational databases, the information schema (information_schema) is an ANSI -standard set of read-only views that provide information about all of the tables, views, columns, and procedures in a database. [1] It can be used as a source of the information that some databases make available through non-standard commands, such as: the SHOW ...

  8. Schema evolution - Wikipedia

    en.wikipedia.org/wiki/Schema_evolution

    Schema evolution. In computer science, schema versioning and schema evolution, deal with the need to retain current data and software system functionality in the face of changing database structure. [1] 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 ...

  9. 7 Types of Eczema: Symptoms, Causes, and Pictures - Healthline

    www.healthline.com/health/types-of-eczema

    Neurodermatitis. Nummular eczema. Stasis dermatitis. Seeing a doctor. Treatment. FAQ. Takeaway. Different types of eczema, including atopic dermatitis and contact dermatitis, may have different ...