enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Query plan - Wikipedia

    en.wikipedia.org/wiki/Query_plan

    RBO or Rule Based Optimization; RBO is slowly being deprecated. For CBO to be used, all the tables referenced by the query must be analyzed. To analyze a table, a DBA can launch code from the DBMS_STATS package. Other tools for query optimization include: SQL Trace [1] Oracle Trace and TKPROF [2] Microsoft SMS (SQL) Execution Plan [3]

  3. Database schema - Wikipedia

    en.wikipedia.org/wiki/Database_schema

    Visual representation often may also be exported as a production-ready source code made in DB-compatible languages like SQL. The database schema is the structure of a database described in a formal language supported typically by a relational database management system (RDBMS).

  4. Scenario testing - Wikipedia

    en.wikipedia.org/wiki/Scenario_testing

    Scenario testing is a software testing activity that uses scenarios: hypothetical stories to help the tester work through a complex problem or test system. The ideal scenario test is a credible, complex, compelling or motivating story; the outcome of which is easy to evaluate. [ 1 ]

  5. Relational model - Wikipedia

    en.wikipedia.org/wiki/Relational_model

    A table in a SQL database schema corresponds to a predicate variable; the contents of a table to a relation; key constraints, other constraints, and SQL queries correspond to predicates. However, SQL databases deviate from the relational model in many details , and Codd fiercely argued against deviations that compromise the original principles.

  6. View (SQL) - Wikipedia

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

    This technique allows the definition of other logic for execution in place of an insert, update, or delete operation on the views. Thus database systems can implement data modifications based on read-only views. However, an INSTEAD OF trigger does not change the read-only or updatable property of the view itself.

  7. Scenario (computing) - Wikipedia

    en.wikipedia.org/wiki/Scenario_(computing)

    In computing, a scenario (UK: / s ɪ ˈ n ɑː r i oʊ /, US: / s ə ˈ n ɛər i oʊ /; loaned from Italian scenario (pronounced [ʃeˈnaːrjo]), from Latin scena 'scene' [1]) is a narrative of foreseeable interactions of user roles (known in the Unified Modeling Language as 'actors') and the technical system, which usually includes computer hardware and software.

  8. Browse great deals that our Editors find daily from great stores like Target. These Target sales are often limited so visit often and save daily.

  9. Database design - Wikipedia

    en.wikipedia.org/wiki/Database_design

    Database design is the organization of data according to a database model.The designer determines what data must be stored and how the data elements interrelate. With this information, they can begin to fit the data to the database model. [1]