Classes letting users use underlying database functions as annotations, aggregations, or filters in Django.
Field note
Classes documented below provide a way for users to use functions provided by the underlying database as annotations, aggregations, or filters in Django.
Capabilities
Tags
Ways to use it
python / Django
Product features
Forces the result type of expression to the one from output_field.
Accepts a list of at least two field names or expressions and returns the first non-null value.
Takes an expression and a collation name to query against.
Extracts a component from a date or time field.
Accepts a list of at least two field names or expressions and returns the greatest value.
Returns the least value from a list of expressions.
Returns null if two expressions are equal, otherwise returns the first expression.
Truncates a date or time field to a specified precision.