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Database operation
A range query is a common database operation that retrieves all records where some value is between an upper and lower boundary. For example, list all
Range_query_(database)
Organized collection of data in computing
design of databases spans formal techniques and practical considerations, including data modeling, efficient data representation and storage, query languages
Database
Database using graph structures for queries
A graph database (GDB) is a database that uses graph structures for semantic queries with nodes, edges, and properties to represent and store data. A key
Graph_database
Study of database design and use
areas, the foundations of query languages, computational complexity and expressive power of queries, finite model theory, database design theory, dependency
Database_theory
Computer network protocol
WHOIS (pronounced as the phrase "who is") is a query and response protocol that is used for querying databases that store an Internet resource's registered
WHOIS
Database model
and retrieval procedures for answering queries. Most relational databases use the SQL data definition and query language; these systems implement what
Relational_model
Database class for storage and retrieval of modeled data
query languages or work alongside SQL databases in polyglot-persistent setups, where multiple database types are combined. Non-relational databases date
NoSQL
Divisioning of a logical database
partitions. While this effectively prevents hot spots, it sacrifices range query efficiency as adjacent keys scatter across partitions. Common implementations
Partition_(database)
SQL statement that returns a result set of rows from one or more tables
language, SELECT queries specify a result set, but do not specify how to calculate it. The database translates the query into a "query plan" which may
Select_(SQL)
science, the range searching problem consists of processing a set S of objects, in order to determine which objects from S intersect with a query object, called
Range_searching
Type of database that uses vectors to represent other data
vector database along with a link to the document. Given a user prompt, the feature vector of the prompt is computed, and the database is queried to retrieve
Vector_database
Marker used in SQL databases to indicate a value does not exist
In the SQL database query language, null or NULL is a special marker used to indicate that a data value does not exist in the database. Introduced by
Null_(SQL)
Ordered tree data structure
and Wong, and Willard. The range tree is an alternative to the k-d tree. Compared to k-d trees, range trees offer faster query times of (in Big O notation)
Range_tree
Database that stores information relating to past, present and future time
times. A uni-temporal database has one axis of time, either the validity range or the system time range. A bi-temporal database has two axes of time:
Temporal_database
Family of database software by Microsoft
relational database management system developed by Microsoft using Structured Query Language (SQL, often pronounced "sequel"). As a database server, it
Microsoft_SQL_Server
Concept in databases
In relational databases, a condition (or predicate) in a query is said to be sargable if the DBMS engine can take advantage of an index to speed up the
Sargable
Computer science query
querying ideas in The iDistance Technique. The range query and K Nearest Neighbor query algorithms can be easily extended to support interval queries
Bx-tree
Multi-model database
(graphs, JSON documents, key/value) with one database core and a unified query language AQL (ArangoDB Query Language). AQL is mainly a declarative language
ArangoDB
Open source column-oriented RDBMS
column-oriented relational database management system (RDBMS). It is designed to provide high performance on complex queries against large databases in embedded configuration
DuckDB
Relational model
provide a declarative database-query language for data manipulation in this data model. It formed the inspiration for the database-query languages QUEL and
Tuple_relational_calculus
Processing mode
multi-dimensional analytical (MDA) queries. The term OLAP was created as a slight modification of the traditional database term online transaction processing
Online_analytical_processing
Data structure
alternatively as a collection of files with non-overlapping key ranges. To perform a query on a particular key to get its associated value, one must search
Log-structured_merge-tree
computational geometry and database theory, a range reporting query asks for a list of the points that match the query. The query is often specified by a
Range_reporting
Data structure for query optimization in databases
Type of database index Search engine indexing – Method for data management Mitchell, Sarah (2025-12-03). "How Do Database Indexes Speed Up Queries?". Terabyte
Database_index
System that provides database services specifically for arrays
query functionality. SciQL is an array query language being added to the MonetDB DBMS. SciDB is a more recent initiative to establish array database support
Array_DBMS
Online media database
Observatory FindAnyFilm Internet Movie Cars Database Movie Review Query Engine List of online databases "Conditions of Use". IMDb. Archived from the original on
IMDb
Database transaction integrity concept
released at the end of the transaction. Also range-locks must be acquired when a SELECT query uses a ranged WHERE clause, especially to avoid the phantom
Isolation_(database_systems)
Free and open-source object relational database management system
database schemas, and write SQL scripts. VisuaLeaf also provides features such as RBAC management, query building, data visualization, and database administration
PostgreSQL
Unordered set of n-time-series possibly of different lengths
drastically reduce storage footprints and accelerate queries relative to general-purpose databases. For example, the sequential uniformity of temporal
Time_series_database
SQL database engine software
Widenius' daughter My, and "SQL", the acronym for Structured Query Language. A relational database organizes data into one or more data tables in which data
MySQL
Cloud-based data warehouse service
availability, BigQuery found success among a broad range of customers, including airlines, insurance, and retail organizations. BigQuery requires all requests
BigQuery
Declarative logic programming language
behavior and properties from Prolog. It is often used as a query language for deductive databases. Datalog has been applied to problems in data integration
Datalog
System to identify resources on a network
server responds with answers to queries against its database. The most common types of records stored in the DNS database are for start of authority (SOA)
Domain_Name_System
Relational database access language
QUEL is a relational database query language, based on tuple relational calculus, with some similarities to SQL. It was created as a part of the Ingres
QUEL_query_languages
Optimizing the performance of a database
Database tuning describes a group of activities used to optimize and homogenize the performance of a database. It usually overlaps with query tuning,
Database_tuning
Open-source analytical query engine
a library by developers building databases, query engines, and analytical tools, rather than as a standalone database server. The project originated in
Apache_DataFusion
SQL toolkit and object-relational mapper
and flexible database access. SQLAlchemy offers tools for database schema generation, querying, and object-relational mapping. Key features include: A comprehensive
SQLAlchemy
Relational database management system
ObjectPAL. Although key features of the DOS product, the QBE (query-by-example) and the database engine, were ports keeping the DOS code, there was a major
Paradox_(database)
Cloud-based NoSQL document database service
wide range of use cases such as retrieving user data, product catalogs, and even updating the database. GQL also has support for ancestor queries. This
Google_Cloud_Datastore
Data storage paradigm in computing
keys are ordered, and because of that it is possible to do range queries. A range query retrieves all keys between two specified keys, ensuring that
Ordered_key–value_store
Computer software system
to a database management system (DBMS), which is, however, designed for static data in conventional databases. A DBMS also offers a flexible query processing
Data_stream_management_system
Overview of and topical guide to databases
language – Query language – Information retrieval query language – query language used to make queries into database, where the semantics of the query are defined
Outline_of_databases
Learned Index for Point, Range, and Nearest-Neighbor Queries, Proceedings of the 23rd International Conference on Extending Database Technology, Copenhagen
IDistance
Database management system that primarily relies on main memory for computer data storage
An in-memory database (IMDb, or main memory database system (MMDB) or memory resident database) is a database management system that primarily relies on
In-memory_database
Approximate nearest neighbor search algorithm
is used to find items that are similar to a query item in a large collection, without comparing the query with every item one by one. The algorithm is
Hierarchical navigable small world
Hierarchical_navigable_small_world
Reduction of data redundancy
of range queries (e.g., show all records where a particular column is between X and Y, or less than X.) In all these cases, however, the database designer
Database_normalization
Relational model database server
System R project was the Structured Query Language (SQL). To apply the relational model, Codd needed a relational-database language he named DSL/Alpha. At
IBM_Db2
OLAP query language
Expressions (MDX) is a query language for online analytical processing (OLAP) using a database management system. Much like SQL, it is a query language for OLAP
MultiDimensional_eXpressions
Horizontal partition of data in a database or search engine
partitioning. The expected gains in efficiency would be reduced if querying the database required multiple instances to be accessed just to retrieve a simple
Shard_(database_architecture)
Data warehousing schema
relational databases are relaxed during star-schema design and implementation. The benefits of star-schema denormalization are: Simpler queries – star-schema
Star_schema
Bioinformatics search algorithm
nucleotide sequence (called a query) with a library or database of sequences, and identify database sequences that resemble the query sequence above a certain
BLAST_(biotechnology)
Database branch of the US National Library of Medicine
to perform sequence similarity searches between a query sequence and sequences in a selected database, such as GenBank. It is commonly used to compare
National Center for Biotechnology Information
National_Center_for_Biotechnology_Information
Notable in-memory database system software includes: "Data models & modeling · ArangoDB v3.4.2 Documentation". docs.arangodb.com. Retrieved 2019-01-27
List_of_in-memory_databases
Function of managing and maintaining DBMS software
a DBA is database recovery (a part of disaster recovery). It is not a case of “if” but a case of “when” a database suffers a failure, ranging from a simple
Database_administration
American computer scientist
Principal Engineer, and was one of the designers of the Express Query metadata database used by Hewlett-Packard as part of their StoreAll large-scale data
Kimberly_Keeton
Free application for event monitoring and alerting
a time series database built using an HTTP pull model, supporting high dimensionality through key-value label pairs, flexible queries, and real-time
Prometheus_(software)
Python and characterized by a publicly writeable schema-less database that provides a query language, a fine-grained permissions model and promotes data
Fluidinfo
Set of rules defining correctly structured programs
database. Some non-standard implementations of SELECT can have persistent effects, such as the SELECT INTO syntax provided in some databases. Queries
SQL_syntax
Optimization problem in computer science
the NNS problem is to compute the distance from the query point to every other point in the database, keeping track of the "best so far". This algorithm
Nearest_neighbor_search
Platform for building AI from enterprise data
system. It connects to existing databases, business applications, and document-based sources, allowing information to be queried directly from its current location
MindsHub
Combining data from multiple sources
There are a wide range of possible applications for data integration, from commercial (such as when a business merges multiple databases) to scientific
Data_integration
Software system for finding relevant information on the Web
Web (or the Internet in general) in response to a user's query. Users submit their queries through a web browser or a mobile app, and the results page
Search_engine
Search engine from Google
based on their relevance to the query and frequently uses generative artificial intelligence (AI) to respond to queries. It is the most-visited website
Google_Search
Online biomedical database
to systematically query with different keywords such as disease, year, organs, etc. For bulk processing, the full PubMed database is available as XML
PubMed
Ability to handle changing demands of resources
Further, some systems ensure that a query sees a time-consistent view of the database by locking data that a query is examining to prevent an update from
Database_scalability
Computer security exploit using injected code
Injection flaws are often found in services like Structured Query Language (SQL) databases, Extensible Markup Language (XML) parsers, operating system
Code_injection
Database manager part of the Microsoft 365 package
incorporation of Fox's Rushmore query optimization routines into Access, Microsoft Access quickly became the dominant database for Windows—effectively eliminating
Microsoft_Access
in k-dimensional space, useful for tasks such as range-searching and multi-dimensional database queries. K-D-B-trees subdivide space into two subspaces
K-D-B-tree
fully (database, schema, and table) qualified query is exemplified as such: SELECT * FROM database.schema.table Both a schema and a database can be used
Comparison of relational database management systems
Comparison_of_relational_database_management_systems
Open-source distributed vector database
available in Milvus: In-memory, on-disk and GPU indices, Single query, batch query and range query search, Support of sparse vectors, binary vectors, JSON and
Milvus_(vector_database)
Logical formulation of recursion
motivated by descriptive complexity theory and their relationship to database query languages, in particular to Datalog. Least fixed-point logic was first
Fixed-point_logic
Method of image retrieval
Content-based image retrieval, also known as query by image content (QBIC) and content-based visual information retrieval (CBVIR), is the application
Content-based_image_retrieval
Database management system
Kùzu is an embeddable graph database management system that supports the Cypher query language. It implements a range of existing and novel state-of-art
Embedded_database
from the commercial database management system. Database caching improves scalability by distributing query workload from backend to multiple cheap front-end
Database_caching
Open-source time series database
C and extends PostgreSQL. TimescaleDB is a relational database and supports standard SQL queries. Additional SQL functions and table structures provide
TimescaleDB
in SQL). Local SQL lets you use SQL to query "local" standard database tables that do not reside on a database server as well as "remote" DBMS servers
Borland_Database_Engine
System to help searching for information
foam/buzzwords in a sort of semi-structured form (database or something), and at last, resolving user entries/queries to return mostly relevant results and links
Search_engine_(computing)
Statistics about search result quality
well an index, search engine, or database returns results from a collection of resources that satisfy a user's query. They are therefore fundamental to
Evaluation measures (information retrieval)
Evaluation_measures_(information_retrieval)
PHP driver for MySQL databases
mysqli_connect("example.com", "user", "password", "database"); $result = mysqli_query($mysqli, "SELECT * FROM myDatabase"); echo mysqli_num_rows($result); $mysql
MySQLi
Android c++ language
newspaper articles, real estate records or paragraphs in a manual. User queries can range from multi-sentence full descriptions of an information need to a
Document_retrieval
Sequential scan of a database
disk to memory transfers. In a database, a query that is not indexed results in a full table scan, where the database processes each record of the table
Full_table_scan
Model or diagram describing interrelated things
mitigate this, either the data model or the SQL query itself must be adjusted. Some database querying software designed for decision support includes
Entity–relationship_model
Data structures that allow approximate membership queries
query filters (hereafter, AMQ filters) comprise a group of space-efficient probabilistic data structures that support approximate membership queries.
Approximate membership query filter
Approximate_membership_query_filter
Type of data model
typically show the results of the query with individual attributes as separate columns. For most EAV database scenarios ad hoc query performance must be tolerable
Entity–attribute–value_model
Structure in data warehousing
end date so that null-value substitution is not required when querying. In some database software, using an artificial high date value could cause performance
Slowly_changing_dimension
Cross-platform document-oriented database
implements its own query language called Mongo Query Language (MQL). MongoDB supports field, range query and regular-expression searches. Queries can return specific
MongoDB
Mapping function that preserves data point locality
representations of its coordinate values. However, when querying a multidimensional search range in these data, using binary search is not really efficient:
Z-order_curve
second. It uses a strongly typed dialect of SQL — YDB Query Language (YQL) as a default query language and supports ACID transactions. The closest analogues
YDB_(database)
Tree data structure
and relies on the triangle inequality for efficient range and k-nearest neighbor (k-NN) queries. While M-trees can perform well in many conditions, the
M-tree
Interrelating info from diverse sources
intention of the query can be seen on the query itself. Unlike SPARQL, SQL query, which reflects the specific structure of the database and derived from
Semantic_integration
Relational database management system
controlling the behavior of the query execution. CUBRID optimizes the common scenario in web applications where database fields need to be incremented on
CUBRID
Tree structure in information science
interlacing of the keys. Insertion, deletion, and point query are done as with ordinary B+ trees. To perform range searches in multidimensional point data, however
UB-tree
key distributions (and hence support lexicographic key ordering and range queries), still providing storage load-balancing and efficient search by using
P-Grid
Abstract interface to a computer database
object can obscure the high cost of each database access. Developers may inadvertently make multiple database queries to retrieve information that could be
Data_access_object
Request method in the HTTP protocol
passed within the URL's query string, specifying (for example) search terms, date ranges, or other information that defines the query. As part of a POST request
POST_(HTTP)
Programming language used in many domains
area. For example, Python is a GPL, while SQL is a DSL for querying relational databases. Early programming languages were designed for scientific computing
General-purpose programming language
General-purpose_programming_language
Database Query". Federal Communications Commission. Archived from the original on August 25, 2009. Retrieved October 26, 2009. "FMQ FM Radio Database
Mass media in Colorado Springs, Colorado
Mass_media_in_Colorado_Springs,_Colorado
NoSQL database service
Traditional databases often split data into smaller pieces to save space, but combining those pieces during searches can make queries slower. Many of
Amazon_DynamoDB
SQL database management software
- Navicat iOS. It is a database administration tool developed for iOS with features included object viewer & designer, query builder & editor, Navicat
Navicat
Processing data technology
architecture where a database is kept entirely in random-access memory (RAM) or flash memory so that usual accesses, in particular read or query operations, do
In-memory_processing
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travel, tourism, insurance