Hibernate dynamic-insert and dynamic-update

When the dynamic-insert  property is set to  true , Hibernate does  not include null values for properties (for properties that aren’t set by the application) during an  INSERT operation. With the  dynamic-update property set to true, Hibernate does not include unmodified  properties in the  UPDATE operation.
This can be specified either via XML:

<class name="MyCar" table="CAR" dynamic-insert="true" dynamic-update="true">


or using annotations:

@Entity 
@org.hibernate.annotations.Entity(dynamicInsert = true, dynamicUpdate = true) 
@Table (name="CAR")

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