CRUD stands for Create, Retrieve, Update and Delete.There are 2 ways of carrying out data plane CRUD operation on DynamoDB tables. You may use the DynamoDB API a.k.a. interface operations or you may use PartiQL, which allows you to run SQL like queries against the DynamoDB tables. Keep in mind that irrespective of the whether you use API or PartiQL:
Maximum data returned by retrieve operations is restricted to 1 MB.
Maximum size of item is 400 KB; in other words write will fail if item size > 400 KB