DynamoDB .table('users') .where('email').eq('test@test.com') .increment({ login_count: 1 }, function( err, data ) { console.log( err, data ) })

// Deprecated ways to deleting an attribute DynamoDB .table('messages') .where('to').eq('user1@test.com') .where('date').eq( 1375538399 ) .update({ seen: undefined, subject: undefined }, function(err) {})

DynamoDB .table('messages') .where('to').eq('user1@test.com') .where('date').eq( 1375538399 ) .delete(['seen','subject'], function( err, data ) { console.log( err, data ) })