Data types

DynamoDB supports various data types, broadly classified into the following two types:

• Scalar data types (string, number, and binary)

• Multivalued data types (string set, number set, and binary set)

Scalar data types

Scalar data types are simply single-value, simple data types. DynamoDB supports the following three scalar data types:

• String

• Number

• Binary

String

The string is a multipurpose, useful data type that is similar to what we use in various programming languages. DynamoDB strings support UTF-8 binary encoding. DynamoDB does not put restrictions on the string size limit, but it specifies that the total attribute size should not be greater than 64 KB and we already know that attribute value is calculated considering the attribute name (key) plus attribute value together. When it comes to ordered query results, DynamoDB does the comparison using ASCII character code value, which means smaller letters (a,b,c,...) are greater than capital letters (A,B,C,…). One thing to note here is...