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Data access layer

A data access layer (DAL) is a software architectural layer that provides access to data from one or more sources, such as a relational database, NoSQL database, SQL query engine, file system, or other persistent storage. It separates client code from the details of storage systems, query execution, connection handling, and data retrieval.

Applications, In application architecture & Use with multiple underlying data systems

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In application architecture

Application softwareBusiness logic
2 related topics

Use with multiple underlying data systems

AbstractProxyGatewayAuthenticationAuthorization
6 related topics

Implementation patterns

Data access objectsObject–relational mapping
2 related topics

Interfaces and protocols

Open Database ConnectivityJava Database Connectivity
2 related topics

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Overview

In application architecture

Implementation patterns

Use with multiple underlying data systems

Interfaces and protocols

Advanced semantic analysis

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Map overview Semantic statistics

Data access layer

Nodes27
Edges26
Triples37
Avg. degree1.93
Density0.074074
Components1

How this topic connects Entity context

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Data access layer

Top relations

related to Interfaces and protocols · 10
Data access layer → ADBC, Apache Arrow Database Connectivity, Arrow Flight SQL, Data, Examples, In, Java Database Connectivity, JDBC, ODBC, Open Database Connectivity
related to In application architecture · 8
Data access layer → APIs, Business, DAL, Depending, For, In, Instead, SQL
related to Use with multiple underlying data systems · 4
Data access layer → DAL, In, The, This
related to Implementation patterns · 3
Data access layer → Object, Other, These
related to Distinction from related patterns · 2
Data access layer → In, It

Important terminology Word statistics

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Important terminology

data access layer database may application systems query storage applications interfaces system dal relational layers used implemented sources code multiple

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
connection managementinstance ofor querying data while hiding details0.80text
SQL statementsinstance ofor querying data while hiding details0.80text
storage APIsinstance ofor querying data while hiding details0.80text
error handlinginstance ofor querying data while hiding details0.80text
and result conversioninstance ofor querying data while hiding details0.80text
insertinstance ofinstead of using commands0.80text
deleteinstance ofinstead of using commands0.80text
and update throughout an application to access a specific tableinstance ofinstead of using commands0.80text
methods such as registerUser or loginUser may be implemented inside the data access layerinstance ofinstead of using commands0.80text
Apache Arrow Database Connectivityinstance ofand newer interfaces0.80text
Data access layerrelated to Distinction from related patternsIt0.60section
Data access layerrelated to Distinction from related patternsIn0.60section

Related concept clusters Concept neighborhoods

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    Min side: 3
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