Query optimization is a feature of many relational database management systems and other databases such as NoSQL and graph databases. The query optimizer...
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Database (redirect from Query Processing)
especially in a data warehouse system. Query optimizer – Performs query optimization on every query to choose an efficient query plan (a partial order (tree) of...
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time for executing a query. Oracle offers two optimization approaches: CBO or Cost Based Optimization RBO or Rule Based Optimization RBO is slowly being...
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before the optimization. The secondary goal is to try to form common subexpressions within a single query, or if there is more than one query being evaluated...
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Surrogate key (section Query optimization)
are likely to be those queried, then the query optimizer is forced to perform a full table scan when fulfilling likely queries. The remedy to the full...
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called query optimization and is performed by the query processor itself. SQL Server includes a cost-based query optimizer which tries to optimize on the...
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Array DBMS (section Query processing)
the data and query model, Array DBMSs sometimes are subsumed under the NoSQL category, in the sense of "not only SQL". Query optimization and parallelization...
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query optimization. Query optimization consists in determining from a query the most efficient manner (or manners) to execute it. Query optimization can...
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Select (SQL) (redirect from SQL query)
functionality is called the "query optimizer" as it is responsible for finding the best possible execution plan for the query, within applicable constraints...
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Data stream management system (redirect from Continuous query)
also cost-based optimization techniques like in DBMS, where a query plan with the lowest costs is chosen from different equivalent query plans. One example...
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Implementation and Management. Microsoft Press. Covering Indexes for Query Optimization "11.9. Index-Only Scans and Covering Indexes". PostgreSQL Documentation...
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is known as a non-sargable query and typically has a negative effect on query time, so one of the steps in query optimization is to convert them to be sargable...
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explores foundations of query optimization and data integration. Here most work studied conjunctive queries, which admit query optimization even under constraints...
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algorithm choices (such as the dynamic programming algorithm used in query optimization), influenced many later relational systems. System R's first customer...
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unrelated concepts also named similarly, for example, query rewriting by search engines. Query optimization Vassilakopoulos, Michael; Tzouramanis, Theodoros;...
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Hive uses Calcite for cost-based query optimization; Drill and Kylin use Calcite for SQL parsing and optimization; Samza and Storm use Calcite for streaming...
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burden on the entire database. Database Database index Optimizing compiler Query plan Query optimization SQL "Avoiding Table Scans". Oracle. 2011. "Which is...
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AT&T U.S. Patent 4769772, Automated query optimization method using both global and parallel local optimizations for materialization access planning for...
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"Postgres Plus Advanced Server Performance and Scalability Guide: Query Optimization Hints". Archived from the original on 2014-04-19. Retrieved 2013-06-24...
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science at the University of Mannheim and known for his research on query optimization within database systems. Moerkotte started studying computer science...
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Join (SQL) (redirect from Query (database))
A join clause in the Structured Query Language (SQL) combines columns from one or more tables into a new table. The operation corresponds to a join operation...
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Bayesian optimization is a sequential design strategy for global optimization of black-box functions that does not assume any functional forms. It is usually...
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Search engine optimization (SEO) is the process of improving the quality and quantity of website traffic to a website or a web page from search engines...
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PostgreSQL (section Other querying features)
expanded inline into the calling (SQL) query, which saves function call overhead and allows the query optimizer to "see inside" the function. Procedural...
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query containment is in query optimization: Deciding whether two queries are equivalent is possible by simply checking mutual containment. The query containment...
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purchase of FoxPro in 1992 and the incorporation of Fox's Rushmore query optimization routines into Access, Microsoft Access quickly became the dominant...
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CUBRID (section Query plan caching)
connections caching and relaying information (e.g. query results) query syntax analysis, optimization and execution plan generation Also, a local object...
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A web query or web search query is a query that a user enters into a web search engine to satisfy their information needs. Web search queries are distinctive...
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are aggregation queries, or queries with set difference. Identifying whether a query is monotonic can be crucial for query optimization, especially in...
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loop join algorithms. The query optimizer determines which type of join algorithm to use based on its analysis of the query. Nested-loop joins are most...
46 KB (4,772 words) - 01:54, 30 August 2024