SQLAlchemy 2.0 Documentation
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Mapping SQL Expressions
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2023-01-31 21:01:49
Mapping SQL Expressions
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Dialects
SQLite
Microsoft SQL Server
PostgreSQL
MySQL and MariaDB
Oracle
SQLAlchemy Unified Tutorial
Working with Database Metadata
Working with Transactions and the DBAPI
Working with Data
Using SELECT Statements
Using UPDATE and DELETE Statements
Using INSERT Statements
Further Reading
Establishing Connectivity - the Engine
Data Manipulation with the ORM
Working with Related Objects
Error Messages
SQLAlchemy ORM
ORM Quick Start
Relationship Configuration
Collection Customization and API Details
Basic Relationship Patterns
Working with Large Collections
Special Relationship Persistence Patterns
Using the legacy ‘backref’ relationship parameter
Configuring how Relationship Joins
Adjacency List Relationships
Relationships API
ORM Querying Guide
Relationship Loading Techniques
Column Loading Options
Legacy Query API
ORM API Features for Querying
ORM-Enabled INSERT, UPDATE, and DELETE statements
Writing SELECT statements for Inheritance Mappings
Writing SELECT statements for ORM Mapped Classes
ORM Examples
Using the Session
Contextual/Thread-local Sessions
Additional Persistence Techniques
State Management
Session API
Tracking queries, object and Session Changes with Events
Transactions and Connection Management
Session Basics
Cascades
Events and Internals
ORM Internals
ORM Exceptions
ORM Events
ORM Mapped Class Configuration
Integration with dataclasses and attrs
Composite Column Types
Non-Traditional Mappings
Class Mapping API
Mapping Class Inheritance Hierarchies
Changing Attribute Behavior
ORM Mapped Class Overview
Mapping SQL Expressions
Mapping Table Columns
SQL Expressions as Mapped Attributes
Configuring a Version Counter
Mapping Classes with Declarative
Table Configuration with Declarative
Declarative Mapping Styles
Mapper Configuration with Declarative
Composing Mapped Hierarchies with Mixins
ORM Extensions
Indexable
Baked Queries
Alternate Class Instrumentation
Asynchronous I/O (asyncio)
Horizontal Sharding
Ordering List
Mypy / Pep-484 Support for ORM Mappings
Association Proxy
Declarative Extensions
Automap
Mutation Tracking
Hybrid Attributes
SQLAlchemy Core
Core API Basics
Events
Core Exceptions
Core Internals
Runtime Inspection API
SQL Datatype Objects
Base Type API
The Type Hierarchy
Custom Types
Schema Definition Language
Reflecting Database Objects
Column INSERT/UPDATE Defaults
Defining Constraints and Indexes
Describing Databases with MetaData
Customizing DDL
Engine and Connection Use
Core Events
Working with Engines and Connections
Engine Configuration
Connection Pooling
SQL Statements and Expressions API
Visitor and Traversal Utilities
Insert, Updates, Deletes
SQL and Generic Functions
Expression Serializer Extension
SQL Expression Language Foundational Constructs
SELECT and Related Constructs
Custom SQL Constructs and Compilation Extension
Operator Reference
Column Elements and Expressions
Changes and Migration
0.5 Changelog
What’s New in SQLAlchemy 0.9?
1.3 Changelog
1.2 Changelog
0.7 Changelog
What’s New in SQLAlchemy 0.7?
0.4 Changelog
1.4 Changelog
What’s New in SQLAlchemy 1.2?
1.1 Changelog
What’s New in SQLAlchemy 1.4?
0.9 Changelog
SQLAlchemy 2.0 - Major Migration Guide
What’s New in SQLAlchemy 2.0?
What’s New in SQLAlchemy 0.8?
0.2 Changelog
0.8 Changelog
What’s new in SQLAlchemy 0.5?
2.0 Changelog
0.1 Changelog
0.3 Changelog
1.0 Changelog
0.6 Changelog
What’s New in SQLAlchemy 0.6?
What’s New in SQLAlchemy 1.1?
What’s New in SQLAlchemy 1.0?
What’s new in SQLAlchemy 0.4?
What’s New in SQLAlchemy 1.3?
Frequently Asked Questions
Sessions / Queries
ORM Configuration
Installation
Connections / Engines
Performance
Third Party Integration Issues
MetaData / Schema
SQL Expressions
Overview
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