Deletes a single item in a table by primary key. You can perform a
conditional delete operation that deletes the item if it exists, or if it
has an expected attribute value.
In addition to deleting an item, you can also return the item's attribute
values in the same operation, using the ReturnValues
parameter.
Unless you specify conditions, the DeleteItem
is an
idempotent operation; running it multiple times on the same item or
attribute does not result in an error response.
Conditional deletes are useful for deleting items only if specific
conditions are met. If those conditions are met, DynamoDB performs the
delete. Otherwise, the item is not deleted.