Delete (SQL) — In the database structured query language (SQL), the DELETE statement removes one or more records from a table. A subset may be defined for deletion using a condition, otherwise all records are removed.[1] Contents 1 Usage 2 Examples 3 … Wikipedia
Delete key — Not to be confused with delete character. The delete key (Delete or … Wikipedia
Kirchhoff's theorem — In the mathematical field of graph theory Kirchhoff s theorem or Kirchhoff s matrix tree theorem named after Gustav Kirchhoff is a theorem about the number of spanning trees in a graph. It is a generalization of Cayley s formula which provides… … Wikipedia
šalinti lentelės eilutę — statusas T sritis informatika apibrėžtis Komanda ↑veikiamajai lentelės eilutei pašalinti. Naudojama įvairių dokumentų rengyklėse: ↑rašyklėse, ↑skaičiuoklėse, ↑hiperteksto rengyklėse ir kt. Veikiamąją eilutę nurodo bet kuris pažymėtas tos eilutės… … Enciklopedinis kompiuterijos žodynas
Database trigger — A database trigger is procedural code that is automatically executed in response to certain events on a particular table or view in a database. The trigger is mostly used for keeping the integrity of the information on the database. For example,… … Wikipedia
Cursor (databases) — In computer science and technology, a database cursor is a control structure that enables traversal over the records in a database. Cursors facilitate subsequent processing in conjunction with the traversal, such as retrieval, addition and… … Wikipedia
Foreign key — In the context of relational databases, a foreign key is a referential constraint between two tables. [ [http://www.visualcase.com/kbase/database basics foreign keys.htm For a simpler visualization, see VisualCase.com] ] The foreign key… … Wikipedia
Propagation constraint — In database systems, a propagation constraint details what should happen to a related table when we update a row or rows of a target table (Paul Beynon Davies, 2004, p.108). Tables are linked using primary key to foreign key relationships. It is… … Wikipedia
SQL — This article is about the database language. For the airport with IATA code SQL, see San Carlos Airport. SQL Paradigm(s) Multi paradigm Appeared in 1974 Designed by Donald D. Chamberlin Raymond F. Boyce Developer … Wikipedia
Keyboard layout — QWERTY keyboard on a laptop. A keyboard layout is any specific mechanical, visual, or functional arrangement of the keys, legends, or key–meaning associations (respectively) of a computer, typewriter, or other typographic keyboard. Mechanical… … Wikipedia
