query by example
In database management systems, query by example (QBE) refers to a method of forming queries in which the database program displays a blank record with a space for each field. You can then enter conditions for each field that you want to be included in the query. For example, if you wanted to find all records where the AGE field is greater than 65, you would enter >65 in the AGE field blank.
QBE systems are considered easier to learn than formal query languages.
Read Also:
- query language
A specialized language for requesting information from a database. For example, the query SELECT ALL WHERE age > 30 AND name = “Smith” requests all records in which the name-field is “Smith” and the Age field has a value greater than 30. The de facto standard for query languages is SQL.
- query string
The portion of a dynamic URL that contains the search parameters when a dynamic Web site is searched. Query strings do not exist until a user plugs the variables into a database search, at which point the search engine will create the dynamic URL with the query string based on the results. Query strings typically […]
- Queue
(v.) To line up. In computer science, queuing refers to lining up jobs for a computer or device. For example, if you want to print a number of documents, the operating system (or a special print spooler) queues the documents by placing them in a special area called a print buffer or print queue. The […]
- quiesce
(1) To temporarily render inactive. This refers to many areas in computing such as hardware (to quiesce a device). The time taken to render the device inactive is called the quiesce time. The term quiesce is applied outside of hardware and device suspension and it can refer to a voluntary inactivation of an entire computer […]
- quit
To exit a program in an orderly way. Compare with abort, which exits a program in an unorderly fashion.