AWS dynamo DB training : Basics
Each dynamo DB table is a collection of items and each item consists of a group of attributes. One or two attributes are used as primary keys. One attribute is used by dynamo DB for partitioning. We could also define a second attribute as sort key which the dynamo DB uses to sort each partition. Single table per application Items are similar to rows in a relational DB. There is not limit to the number of items in a table. Attributes are similar to columns in a relational database. Attributes can be scalar or nested. When you create a table you must specify a primary key. Primary key can only be a scalar. You can also define an attribute as a sort key and one attribute as a partition key. Primary key is used as partition key. Items are stored and retrieved using this partition key. Two types of access patterns for table- queries and scans. Queries are based on primary key and read selected items. Scan on the other hand read all the items. Local seconda...