title: DynamoDb : Scan query does not return all the data
body: <p>I have a DynamoDb table with thousands of data. I am scanning the table using Scan function and I have applied "Between" FilterExpression. 
  However , the query response only gives 3 records whereas it should return about 100 records.</p>
  
  <p>I have created the Lambda function using Node js.</p>