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A query string is a part of a uniform resource locator that assigns values to specified parameters.A query string commonly includes fields added to a base URL by a Web browser or other client application, for example as part of an HTML document, choosing the appearance of a page, or jumping to positions in multimedia content.
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Queries per second (QPS) is a measure of the amount of search traffic an information-retrieval system, such as a search engine or a database, receives in one second. [1] The term is used more broadly for any request–response system, where it can more correctly be called requests per second (RPS).
Each stage requires one clock cycle and an instruction passes through the stages sequentially. Without pipelining , in a multi-cycle processor , a new instruction is fetched in stage 1 only after the previous instruction finishes at stage 5, therefore the number of clock cycles it takes to execute an instruction is five (CPI = 5 > 1).
The instruction cycle (also known as the fetch–decode–execute cycle, or simply the fetch–execute cycle) is the cycle that the central processing unit (CPU) follows from boot-up until the computer has shut down in order to process instructions. It is composed of three main stages: the fetch stage, the decode stage, and the execute stage.
SELECT is the most common operation in SQL, called "the query". SELECT retrieves data from one or more tables, or expressions. Standard SELECT statements have no persistent effects on the database. Some non-standard implementations of SELECT can have persistent effects, such as the SELECT INTO syntax provided in some databases. [4]
Only one cache is the "owner", other caches are set "Valid" (S/V/SC). On bus read request, the data is supplied by the "owner" instead of the memory. E= Exclusive or R= Reserved or VE =Valid-Exclusive or EC =Exclusive Clean or Me =Exclusive. clean, in one cache only. Data is stored only in one cache and clean in memory. S =Shared or V =Valid or ...
A hierarchical query is a type of SQL query that handles hierarchical model data. They are special cases of more general recursive fixpoint queries, which compute transitive closures . In standard SQL:1999 hierarchical queries are implemented by way of recursive common table expressions (CTEs).