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databases, a nested table is a table that is embedded within another table. Individual elements can be inserted, updated, and deleted in a nested table. Since
Nested_SQL
Feature to efficiently execute queries efficiently in DBMS software
In some cases such nested SQL queries can be flattened into a select-project-join query, but not always. Query plans for nested SQL queries can also be
Query_optimization
Technique used in relational databases
The nested set model is a technique for representing nested set collections (also known as trees or hierarchies) in relational databases. It is based
Nested_set_model
Free and open-source object relational database management system
database management system (RDBMS) emphasizing extensibility and SQL compliance. PostgreSQL features transactions with atomicity, consistency, isolation,
PostgreSQL
Procedural extension for SQL and the Oracle relational database
PL/SQL (Procedural Language for SQL) is Oracle Corporation's procedural extension for SQL and the Oracle relational database. PL/SQL is available in Oracle
PL/SQL
SQL statement that returns a result set of rows from one or more tables
Queries can be nested so that the results of one query can be used in another query via a relational operator or aggregation function. A nested query is also
Select_(SQL)
SQL clause
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
Join_(SQL)
SQL database engine software
MySQL (/ˌmaɪˌɛsˌkjuːˈɛl/) is a free and open-source relational database management system (RDBMS). Its name is a combination of "My", the name of co-founder
MySQL
Set of rules defining correctly structured programs
The syntax of the SQL programming language is defined and maintained by ISO/IEC SC 32 as part of ISO/IEC 9075. This standard is not freely available.
SQL_syntax
Microsoft relational database
Microsoft SQL Server Compact (SQL CE) is a discontinued relational database produced by Microsoft for applications that run on mobile devices and desktops
SQL_Server_Compact
Database code that executes after certain events on a table
addition to standard data manipulation language (DML) triggers that execute PL/SQL code when data is modified, Oracle supports triggers that fire on schema-level
Database_trigger
reserved. SQL SQL syntax List of relational database management systems Page listing all reserved words in the SQL standard, from SQL-92 to SQL:2016: Standard
List_of_SQL_reserved_words
Database stored query result set
Therefore, an ORDER BY clause in the view definition is meaningless; the SQL standard (SQL:2003) does not allow an ORDER BY clause in the subquery of a CREATE
View_(SQL)
Level of database normalization
table, in SQL) can be said to be in first normal form if each field is atomic, containing a single value rather than a set of values or a nested table. In
First_normal_form
Subroutine available to applications that access relational database management systems
execution of several SQL statements can be saved into stored procedures, and all applications call the procedures. One can use nested stored procedures by
Stored_procedure
American relational database software engineer
Michael J. Kamfonas' nested set model for trees in SQL, a taxonomy of data encoding schemes, and several other design patterns in SQL DDL and DML. Celko
Joe_Celko
SQL clause
ORDER OF ... (not standardized in SQL:2003) which allow the propagation of sort criteria through nested subqueries. The SQL standard's core functionality
Order_by
Computer query in SQL
In a SQL database query, a correlated subquery (also known as a synchronized subquery) is a subquery (a query nested inside another query) that uses values
Correlated_subquery
Digital database whose organization is based on the relational model of data
Database Overview". oracle.com. "A universal relation model for a nested database", The Nested Universal Relation Database Model, Lecture Notes in Computer
Relational_database
Text in computer source code that is generally ignored by a compiler/interpreter
D and Swift, allow block comments to be nested while other do not, including C and C++. An example of nested blocks in D: // line comment /* block comment
Comment (computer programming)
Comment_(computer_programming)
Open-source data analytics software
dataset such as all the webpages on the internet. In comparison to SQL, Pig has a nested relational model, uses lazy evaluation, uses extract, transform
Apache_Pig
Relational model database server
SAP ASE (Adaptive Server Enterprise), originally known as Sybase SQL Server, and also commonly known as Sybase DB or Sybase ASE, is a relational model
Adaptive_Server_Enterprise
Sequence of steps used to access data in a SQL relational database management system
access data in a SQL relational database management system. This is a specific case of the relational model concept of access plans. Since SQL is declarative
Query_plan
Type of database transaction
A nested transaction is a database transaction that is started by an instruction within the scope of an already started transaction. Nested transactions
Nested_transaction
Algorithm
block-nested loop (BNL) is an algorithm used to join two relations in a relational database. This algorithm is a variation of the simple nested loop join
Block_nested_loop
Database concept
the SQL standard and are supported by all established SQL relational databases, including PostgreSQL, Oracle Database, Microsoft SQL Server, MySQL, IBM
Savepoint
Relational database access language
language, based on tuple relational calculus, with some similarities to SQL. It was created as a part of the Ingres DBMS effort at University of California
QUEL_query_languages
for constructing plain SQL from jOOQ objects and code generated from a database schema. jOOQ uses JDBC to call the underlying SQL queries. [citation needed]
JOOQ_Object_Oriented_Querying
Unit of work performed within a database management system
transactions (i.e. sub-transactions). Multi-level transactions are a variant of nested transactions where the sub-transactions take place at different levels of
Database_transaction
Framework
Embedded SQL (also known as E-SQL or ESQL/C) is a way of using SQL when programming in Visual C. Microsoft dropped support for this after SQL Server 6
Microsoft Data Access Components
Microsoft_Data_Access_Components
as long as nested block comments/raw strings use a different number of equals signs than their enclosing comment: --[[comment --[=[ nested comment ]=]
Comparison of programming languages (syntax)
Comparison_of_programming_languages_(syntax)
Database presenting data in XML formats
storage and processing alongside relational data. For example, Microsoft SQL Server supports an XML data type and XML schema collections, which can be
XML_database
Change in the value of one of the keys on which a file is sorted
sequence errors are handled properly. With fourth-generation languages such as SQL, the programming language should handle most of the details of control breaks
Control_break
the use of nested columns, enabling mining of data involving one-to-many relationships (e.g. a star schema). The full functionality of SQL can be used
Oracle_Data_Mining
Reduction of data redundancy
sub-language" grounded in first-order logic. An example of such a language is SQL, though it is one that Codd regarded as seriously flawed. The objectives
Database_normalization
How software progresses through its implementation
then keyword, this can be called an if-else statement. Nested Conditional statements are often nested inside other conditional statements. Arithmetic if Early
Control_flow
Open-source NoSQL database
announced in March 2015 as "SQL for documents". The SQL++ data model is non-first normal form (N1NF) with support for nested attributes and domain-oriented
Couchbase_Server
Database software
Ingres Database (/ɪŋˈɡrɛs/ ing-GRESS) is a proprietary SQL relational database management system intended to support large commercial and government applications
Ingres_(database)
Relational database management system
Firebird is an open-source SQL relational database management system that supports Linux, Microsoft Windows, macOS and other Unix platforms. The database
Firebird_(database_server)
Column-oriented data storage format
Google Dremel interactive ad-hoc query system for analysis of read-only nested data. It is similar to RCFile and ORC, the other columnar-storage file formats
Apache_Parquet
Programming language
database-independent ABAP statements ("Open SQL") into statements understood by the underlying DBMS ("Native SQL"). The database interface handles all the
ABAP
Control flow statement that branches according to a Boolean expression
responds to the nearest preceding if clause. However, the semantics of nested conditionals in some early languages such as ALGOL 60 were less than clear;
Conditional (computer programming)
Conditional_(computer_programming)
convert the redo generated at the primary database into data and SQL and then re-apply those SQL transactions on the logical standby. Thus, physical structures
Oracle_Data_Guard
translate Biml metadata into SQL Server Integration Services (SSIS) and SQL Server Analysis Services (SSAS) assets for the Microsoft SQL Server platform; however
Business Intelligence Markup Language
Business_Intelligence_Markup_Language
Database management system
become incorporated into SQL:1999 via structured types. In fact, any product that adheres to the object-oriented aspects of SQL:1999 could be described
Object–relational_database
Software engineering approach to designing and developing information systems
guarantees; most relational databases use SQL for their queries. However, with the growth of data in the 2010s, NoSQL databases have also become popular since
Data_engineering
Cloud-based service and infrastructure
unstructured data Cloud SQL – Database as a Service based on MySQL, PostgreSQL and Microsoft SQL Server Cloud Bigtable – Managed NoSQL database service Cloud
Google_Cloud_Platform
tabular and nested data in a single logical model. Generate JSON schemas: Output valid schema files for developers from your model. Visualize nested content:
ER/Studio
Web development programming language
happens with types of arity > 0 in nested case or let clauses and disappears by type annotating the variables in the nested clauses. Opa, a language for combined
Ur_(programming_language)
Cloud-based distributed SQL DBMS service
Spanner is a distributed SQL database management and storage service developed by Google. It provides features such as global transactions, strongly consistent
Spanner_(database)
Data serialization format developed by Amazon
of user-defined encoding clob: Text data of user-defined encoding sexp: Nested list of values (equivalent to an S-expression) with application-defined
Ion_(serialization_format)
British software developer and author (born 1963)
Retrieved 1 May 2021. Stephane Faroult; Pascal L'Hermite (2008). Refactoring SQL Applications. O'Reilly Media. p. 8. ISBN 978-0-596-55177-3. Stephen Chin;
Martin Fowler (software engineer)
Martin_Fowler_(software_engineer)
Database data model
having sets or relations as values, e.g. nested tables. This is the major difference to first normal form. NoSQL databases like document databases typically
Unnormalized_form
Delimited series of characters that represent a string in code
Incorrect quoting of nested strings can present a security vulnerability. Use of untrusted data, as in data fields of an SQL query, should use prepared
String_literal
Cloud-based data warehouse service
a Platform as a Service (PaaS) that supports querying using a dialect of SQL and Graph Query Language. It also has built-in machine learning capabilities
BigQuery
System that provides database services specifically for arrays
model, Array DBMSs sometimes are subsumed under the NoSQL category, in the sense of "not only SQL". Query optimization and parallelization are important
Array_DBMS
Software to run a collaborative wiki compared
foswiki/distro". github.com. Retrieved 25 April 2026. "Foswiki is getting SQL RDBMS support!". WikiRing Blog. 1 March 2012. Archived from the original
Comparison_of_wiki_software
Data serialization format
abbreviated as sexpr or sexp) is an expression in a like-named notation for nested list (tree-structured) data. S-expressions were invented for, and popularized
S-expression
Type of data model
tables: one may nest attribute–value pairs in JSONB type fields of the Entity table. That makes the DB schema easy to comprehend and SQL queries concise
Entity–attribute–value_model
Programming language for statistics
chain functions together, rather than using nested function calls. > nrow(subset(mtcars, cyl == 4)) # Nested without the pipe character [1] 11 > mtcars
R_(programming_language)
Cloud-based web application hosting service
using relational databases with App Engine applications. Google Cloud SQL supports MySQL 8.0, 5.7, and 5.6. Developers have read-only access to the file system
Google_App_Engine
Multi-model database
access patterns in a single query. ArangoDB is a NoSQL database system but AQL is similar in many ways to SQL, it uses RocksDB as a storage engine. ArangoDB
ArangoDB
Overview of and topical guide to statistics
Bootstrapping (statistics) Jackknife resampling Integrated nested Laplace approximations Nested sampling algorithm Metropolis–Hastings algorithm Importance
Outline_of_statistics
Windows data storage system project
was conceived to be launched with SQL Server 2000. However, SQL Server 2000 ended up being a minor upgrade to SQL Server 7.0 and RFS was not implemented
WinFS
Functional programming and query language for XML
languages like Lisp and Prolog by excluding nested sequences. Designers of XQuery may have considered nested sequences unnecessary for the manipulation
XQuery
Data storage paradigm in computing
key–value stores found their way into many modern database systems including NewSQL database systems. The origin of ordered key–value store stems from the work
Ordered_key–value_store
Open-source x86 virtualization application
API (Java, Python, SOAP, XPCOM) to control VM configuration and execution Nested paging for AMD-V and Intel VT (only for processors supporting SLAT and with
VirtualBox
Relational database and programming language
its own programming language. The 4D product line has since expanded to an SQL back-end, integrated compiler, integration of PHP, and several productivity
4th_Dimension_(software)
Directory service, created by Microsoft for Windows domain networks
Degremont, Michel (30 June 2011). "Can I install SQL Server on a domain controller?". Microsoft SQL Server blog. Archived from the original on 21 February
Active_Directory
2019-04-30. "tSQLt - Database Unit Testing for SQL Server". Red Gate Software Ltd. "SQL Test - Unit Testing for SQL Server". Red-gate.com. Retrieved 2012-11-12
List of unit testing frameworks
List_of_unit_testing_frameworks
Data storage technology
allow RAID levels to be nested. The elements of a RAID may be either individual drives or arrays themselves. Arrays are rarely nested more than one level
RAID
Problem in computer programming
in which an optional else clause in an if–then(–else) statement can make nested conditional statements ambiguous. Formally, the reference context-free grammar
Dangling_else
Container for a set of identifiers
all Java source files by default. import java.sql.*; // Imports all classes in java.sql, including java.sql.Date import java.util.*; // Imports all classes
Namespace
Functional data processing and query language
Source: Use the EXPAND expression to flatten nested arrays. This expression takes as input an array of nested arrays [[T]] and produces an output array [T]
Jaql
Topics referred to by the same term
Hierarchical database model, a tree-like database model Hierarchical query, an SQL query on a hierarchical database Hierarchical linear modeling, multi-level
Hierarchy_(disambiguation)
Syntactic construct for creating a list based on existing lists
alternative comprehension syntax, reminiscent of Structured Query Language (SQL): using System.Collections.Generic; using System.Linq; IEnumerable<int> s
List_comprehension
Cloud-based NoSQL database service
Bigtable is a fully managed wide-column and key-value NoSQL database service for large analytical and operational workloads as part of the Google Cloud
Bigtable
Conditional operator in computer programming
ifTrue:ifFalse: can be used: |x y| x := 5. y := (x == 5) ifTrue:[10] ifFalse:[15]. The SQL CASE expression is a generalization of the ternary operator. Instead of one
Ternary_conditional_operator
Java-based logging software
" PL-SQL-Logging-Utility is an adaptation of log4j in PL/SQL. Log4db2 is a logging utility for DB2 for LUW that uses SQL instructions with SQL PL code
Log4j
Information Object Class IOS Information Object Set IO Information Object SQL Structured Query Language PER Packed Encoding Rules BER Basic Encoding Rules
Information Object Class (ASN.1)
Information_Object_Class_(ASN.1)
Computer software system
variations. However, most of them are based on SQL, such as the Continuous Query Language (CQL), StreamSQL and ESP. There are also graphical approaches
Data_stream_management_system
mapper (ORM). Instead, the database is directly accessed using SQL-like queries called NewSQL from the application code. A major drawback with in-memory databases
Starcounter
Query and functional programming language
web services). The major expression for performing such operations is the SQL-like “FLWOR expression” that comes from XQuery. A FLWOR expression is constructed
JSONiq
Calendar year
Arabian, Yemeni-foaled English thoroughbred stallion (b. c. 1724) Microsoft SQL Server (and Sybase) has a minimum date value of 1/1/1753. Anton A. Huurdeman
1753
Computer programming convention
many compound statements nested to many levels of indentation. As the programmer scrolls to the bottom of a huge set of nested statements, they may lose
Indentation_style
Composite data type
quite sophisticated at the time. The language allows for the definition of nested records with alphanumeric, integer, and fractional fields of arbitrary size
Record_(computer_science)
Type of database
A wide-column store (or extensible record store) is a type of NoSQL database. It uses tables, rows, and columns, but unlike a relational database, the
Wide-column_store
Series of references where the last object references the first
return plus1(k) def plus1(n: int) -> int: return posn(n + 1) In ISO Standard, SQL circular integrity constraints are implicitly supported within a single table
Circular_reference
Blog and web-based content management system written in PHP
written in PHP and available under a BSD license. It supports PostgreSQL, MySQL, SQLite database backends, the Smarty template engine, and a plugin architecture
Serendipity_(software)
Programming language construct
shown below. Standard SQL uses the same operators as BASIC, while many databases allow != in addition to <> from the standard. SQL follows strict boolean
Relational_operator
Typographical mark (`) (Freestanding grave accent)
quote, except that a nested expression prefixed with a comma is replaced with the value of that nested expression. If the nested expression happens to
Backtick
Data analysis software
coding tools supporting the use of the SAS language mixed with Python, R and SQL. WPS can use programs written in the language of SAS without the need for
World_Programming_System
Backup and disaster recovery software
Dynamic Help. New Advanced Windows Server 2016 Support (Shielded VM Backup, Nested VM Backup, and Containers). 9 2015 Added Rapid VM recovery, Hyper-V tab
BackupAssist
Open source NoSQL database
Aerospike Database is a real-time, high-performance NoSQL database. It is designed for applications that cannot experience any downtime and require high
Aerospike_(database)
Mathematical set formed from two given sets
Cartesian product) Direct product Empty product Finitary relation Join (SQL) § Cross join Orders on the Cartesian product of totally ordered sets Outer
Cartesian_product
Open-source statistical package
user interface and can connect directly to MySQL, PostgreSQL, SQLite, MS Access (map), and Microsoft SQL Server. Data can also be imported from CSV and
SOFA_Statistics
Data organized by tags but not tables
For example, Microsoft SQL Server has a native JSON type backed by string manipulation, and it can create a B-tree index for nested keys. The Snowflake data
Semi-structured_data
Expression language for XML documents
Scrapy libxml2 Nokogiri Sedna XML Database MySQL supports a subset of XPath from version 5.1.5 onwards PostgreSQL supports XPath and XSLT from version 8.4
XPath
Type of data model
real world; recipes, table of contents, ordering of paragraphs/verses, any nested and sorted information. This hierarchy is used as the physical order of
Database_model
Tree-like structure for data
Hierarchical Data in MySQL (This page is from archive.org as the page has been removed from MySQL.com) Hierarchical data in MySQL: parents and children
Hierarchical_database_model
travel, tourism, insurance
NESTED SQL
NESTED SQL
NESTED SQL
NESTED SQL
NESTED SQL
NESTED SQL
NESTED SQL
NESTED SQL
NESTED SQL
travel, tourism, insurance