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First released in 1987, a second version in 1989 [2] added the ability to run queries in parallel, and the product became fairly famous for being one of the few systems that scales almost linearly with the number of processors in the machine: adding a second CPU to an existing NonStop SQL server almost exactly doubled its performance.
Database tuning describes a group of activities used to optimize and homogenize the performance of a database.It usually overlaps with query tuning, but refers to design of the database files, selection of the database management system (DBMS) application, and configuration of the database's environment (operating system, CPU, etc.).
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 ...
SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd [12] in the early 1970s. [13] This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored in IBM's original quasirelational database management system, System R, which a group at IBM San ...
In-memory database engine built into SQL Server 2014 [144] SQL16 SQL Server 2016 Version 13 [145] Helsinki SQL Server 2017 Version 14 [146] [147] Seattle SQL Server 2019 Version 15 [148] Aris SQL Server Big Data Clusters Announced at Microsoft Ignite 2018 event on September 24–28. Retirement announced for Feb-28 2025 [149] Dallas SQL Server 2022
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time (Unix) - can be used to determine the run time of a program, separately counting user time vs. system time, and CPU time vs. clock time. [1] timem (Unix) - can be used to determine the wall-clock time, CPU time, and CPU utilization similar to time (Unix) but supports numerous extensions.
Oracle Forms is a software product for creating screens that interact with an Oracle database. It has an IDE that includes an object navigator, property sheet, and code editor that uses PL/SQL. It was originally developed to run server-side in character-mode terminal sessions.