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  2. Microsoft Access - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Access

    An additional solution, the SQL Server Migration Assistant for Access (SSMA), continues to be available for free download from Microsoft. A variety of upgrading options are available. After migrating the data and queries to SQL Server, the Access database can be linked to the SQL database, subject to data type conversion limitations:

  3. SQL - Wikipedia

    en.wikipedia.org/wiki/SQL

    Structured Query Language ( SQL) ( pronounced S-Q-L; historically "sequel") [4] [5] is a domain-specific language used to manage data, especially in a relational database management system (RDBMS). It is particularly useful in handling structured data, i.e., data incorporating relations among entities and variables.

  4. IBM Db2 - Wikipedia

    en.wikipedia.org/wiki/IBM_Db2

    Website. ibm .com /products /db2-for-zos. Db2 is a family of data management products, including database servers, developed by IBM. It initially supported the relational model, but was extended to support object–relational features and non-relational structures like JSON and XML.

  5. Hierarchical and recursive queries in SQL - Wikipedia

    en.wikipedia.org/wiki/Hierarchical_and_recursive...

    Hierarchical and recursive queries in SQL. A hierarchical query is a type of SQL query that handles hierarchical model data. They are special cases of more general recursive fixpoint queries, which compute transitive closures . In standard SQL:1999 hierarchical queries are implemented by way of recursive common table expressions (CTEs).

  6. PostgreSQL - Wikipedia

    en.wikipedia.org/wiki/PostgreSQL

    PostgreSQL server is process-based (not threaded), and uses one operating system process per database session. Multiple sessions are automatically spread across all available CPUs by the operating system. Many types of queries can also be parallelized across multiple background worker processes, taking advantage of multiple CPUs or cores.

  7. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    A server operator has received a legal demand to deny access to a resource or to a set of resources that includes the requested resource. The code 451 was chosen as a reference to the novel Fahrenheit 451 (see the Acknowledgements in the RFC). 5xx server errors. The server failed to fulfill a request.

  8. Lightweight Directory Access Protocol - Wikipedia

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

    Delete requests are subject to access controls, that is, whether a connection with a given authentication state will be permitted to delete a given entry is governed by server-specific access control mechanisms. Search and compare. The Search operation is used to both search for and read entries. Its parameters are: baseObject

  9. Set operations (SQL) - Wikipedia

    en.wikipedia.org/wiki/Set_operations_(SQL)

    Set operations (SQL) Set operations in SQL is a type of operations which allow the results of multiple queries to be combined into a single result set. [1] Set operators in SQL include UNION, INTERSECT, and EXCEPT, which mathematically correspond to the concepts of union, intersection and set difference .