It implements this simple design by locking the entire database file during writing. SQLite stores the entire database (definitions, tables, indices, and the data itself) as a single cross-platform file on a host machine. The application program uses SQLite's functionality through simple function calls, which reduce latency in database access: function calls within a single process are more efficient than inter-process communication. Instead, the SQLite library is linked in and thus becomes an integral part of the application program. Unlike client–server database management systems, the SQLite engine has no standalone processes with which the application program communicates. SQLite is one of four formats recommended for long-term storage of datasets approved for use by the Library of Congress. In 2011, Hipp announced his plans to add a NoSQL interface (managing documents expressed in JSON) to SQLite databases and to develop UnQLite, an embeddable document-oriented database. In June 2004, SQLite 3.0 added internationalization, manifest typing, and other major improvements, partially funded by America Online. In September 2001, SQLite 2.0 replaced gdbm with a custom B-tree implementation, adding transaction capability. In August 2000, version 1.0 of SQLite was released, with storage based on gdbm (GNU Database Manager). Hipp based the syntax and semantics on those of PostgreSQL 6.5. The design goals of SQLite were to allow the program to be operated without installing a database management system or requiring a database administrator.
#VIEW SQLITE DATABASE ONLINE SOFTWARE#
Hipp was designing software used for a damage-control system aboard guided-missile destroyers, which originally used HP-UX with an IBM Informix database back-end. Richard Hipp designed SQLite in the spring of 2000 while working for General Dynamics on contract with the United States Navy. The following command will delete COMPANY_VIEW view, which we created in the last section.D. The basic DROP VIEW syntax is as follows − To drop a view, simply use the DROP VIEW statement with the view_name. You can now query COMPANY_VIEW in a similar way as you query an actual table. This view will be used to have only a few columns from COMPANY table. ExampleĬonsider COMPANY table with the following records −įollowing is an example to create a view from COMPANY table. If the optional TEMP or TEMPORARY keyword is present, the view will be created in the temp database. You can include multiple tables in your SELECT statement in a similar way as you use them in a normal SQL SELECT query. SQLite views can be created from a single table, multiple tables, or another view.įollowing is the basic CREATE VIEW syntax.ĬREATE VIEW view_name AS SQLite views are created using the CREATE VIEW statement.
#VIEW SQLITE DATABASE ONLINE UPDATE#
However, you can create a trigger on a view that fires on an attempt to DELETE, INSERT, or UPDATE a view and do what you need in the body of the trigger.
SQLite views are read-only and thus you may not be able to execute a DELETE, INSERT or UPDATE statement on a view. Summarize data from various tables, which can be used to generate reports. Restrict access to the data such that a user can only see limited data instead of a complete table. Structure data in a way that users or classes of users find natural or intuitive. Views which are kind of virtual tables, allow the users to −
A view can be created from one or many tables which depends on the written SQLite query to create a view. It is actually a composition of a table in the form of a predefined SQLite query.Ī view can contain all rows of a table or selected rows from one or more tables. A view is nothing more than a SQLite statement that is stored in the database with an associated name.
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