Domains
on Amazon SimpleDB are simply tables just like spreadsheets containing rows and columns that intersect to create cells. Amazon SimpleDB manage your structured data into the domains on which you can
run queries
. Domain is consist of
items
and items are described by
attribute-value pair
. Attributes in domains are just like column header in a table or spread sheet.
Unlike ordinary table, in domain Amazon simpleDB allows more then one value associated in a single cell. Here also each item can have its unique set of
attributes
. You even don't need any pre-defined scheme or alter it whenever needed any addition of data later on.
Domains can simply be created with
Create domain
option in SimpleDB.
You can
GET
,
PUT
or
DELETE
attribute in your domain.
Amazon indexes your data as it is so that it could be retrieved easily.
It provides 10GB of storage per domain.
There can be 100 domains in per customer account.
Each item in a domain can have up to 256 attribute-values pairs
Attribute names and attribute values can be up to 1024 bytes in length each.
You can
QUERY
your data set using operators as: =, !=, <, > <=, >=, STARTS-WITH, AND, OR, NOT, INTERSECTION AND UNION.
Related Topics
:
