Creating data

PutItem – Writes a single item to a table. You must specify the primary key attributes, but you don't have to specify other attributes.

BatchWriteItem – Writes up to 25 items to a table. This is more efficient than calling PutItem multiple times because your application only needs a single network round trip to write the items. You can also use BatchWriteItem for deleting multiple items from one or more tables.

Reading data

GetItem – Retrieves a single item from a table. You must specify the primary key for the item that you want. You can retrieve the entire item, or just a subset of its attributes.

BatchGetItem – Retrieves up to 100 items from one or more tables. This is more efficient than calling GetItem multiple times because your application only needs a single network round trip to read the items.

Query – Retrieves all items that have a specific partition key. You must specify the partition key value. You can retrieve entire items, or just a subset of their attributes. Optionally, you can apply a condition to the sort key values so that you only retrieve a subset of the data that has the same partition key. You can use this operation on a table, provided that the table has both a partition key and a sort key. You can also use this operation on an index, provided that the index has both a partition key and a sort key.

Scan – Retrieves all items in the specified table or index. You can retrieve entire items, or just a subset of their attributes. Optionally, you can apply a filtering condition to return only the values that you are interested in and discard the rest.

Updating data

UpdateItem – Modifies one or more attributes in an item. You must specify the primary key for the item that you want to modify. You can add new attributes and modify or remove existing attributes. You can also perform conditional updates, so that the update is only successful when a user-defined condition is met. Optionally, you can implement an atomic counter, which increments or decrements a numeric attribute without interfering with other write requests.

Deleting data

DeleteItem – Deletes a single item from a table. You must specify the primary key for the item that you want to delete.

BatchWriteItem – Deletes up to 25 items from one or more tables. This is more efficient than calling DeleteItem multiple times because your application only needs a single network round trip to delete the items. You can also use BatchWriteItem for adding multiple items to one or more tables.