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Oracle implements hints by using specially-crafted comments in the query that begin with a + symbol, thus not affecting SQL compatibility. [2] EDB Postgres Advanced Server (a proprietary version of PostgreSQL from EnterpriseDB) offers hints compatible with those of Oracle. [3] [4] Microsoft SQL Server offers hints via the OPTION keyword [5]
CCL is patterned after the Structured Query Language (SQL). All Cerner Millennium health information technology software uses CCL/Discern Explorer to select from, insert into, update into and delete from a Cerner Millennium database and allows a programmer to fetch data from an Oracle database and display it as the user wants to see. With ...
The query optimizer attempts to determine the most efficient way to execute a given query by considering the possible query plans. [ 1 ] Generally, the query optimizer cannot be accessed directly by users: once queries are submitted to the database server, and parsed by the parser, they are then passed to the query optimizer where optimization ...
Deriving a query result based on the results of the first stage For example, in order to find out the monetary sum of all transactions that occurred in October 2003 for all customers, the system would have to know that it must first unpack the Transactions group of each customer, then sum the Amounts of all transactions thus obtained where the ...
Hyperion Solutions Corporation was a software company located in Santa Clara, California, which was acquired by Oracle Corporation in 2007. Many of its products were targeted at the business intelligence (BI) and business performance management markets, and as of 2013 [update] were developed and sold as Oracle Hyperion products.
Object Query Language (OQL) is a query language standard for object-oriented databases modeled after SQL and developed by the Object Data Management Group (ODMG). Because of its overall complexity the complete OQL standard has not yet been fully implemented in any software.
Contextual Query Language (CQL), previously known as Common Query Language, [1] is a formal language for representing queries to information retrieval systems such as search engines, bibliographic catalogs and museum collection information.
Programs to manage collections of books or appointments and address books may use single-purpose flat-file databases, storing and retrieving information from flat files unadorned with indexes or pointing systems. While a user can write a table of contents into a text file, the text file format itself does not include a concept of a table of ...