DynamoDB: Like (Guide w/ Code Examples)

To perform a like query using the AWS SDK for JavaScript, you need to use the contains function with the FilterExpression parameter, and pass it to a query operation.

const AWS = require('aws-sdk');
const dynamodb = new AWS.DynamoDB({region: 'us-west-2', apiVersion: '2012-08-10'});

const params = {
    TableName : 'YourTableName',
    IndexName: 'YourIndexName',
    KeyConditionExpression: '#name = :value',
    FilterExpression: 'contains(#name, :value)',
    ExpressionAttributeNames:{
        '#name': 'name'
    },
    ExpressionAttributeValues: {
        ':value': {S: 'string'}
    }
};

dynamodb.query(params, function(err, data) {
    if (err) {
        console.log("Error", err);
    } else {
        console.log("Success", data);
    }
});