Query result ordering (ascending, descending) in DynamoDB - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the 'ScanIndexForward' parameter control in a DynamoDB query?

It controls the order of the query results. Setting it to true returns results in ascending order by sort key, and false returns results in descending order.

beginner

How do you get query results in descending order in DynamoDB?

Set the 'ScanIndexForward' parameter to false in your query request.

beginner

True or False: DynamoDB query results are always returned in ascending order by default.

True. By default, 'ScanIndexForward' is true, so results come back in ascending order by sort key.

intermediate

If you want to see the newest items first in a DynamoDB query, what should you do?

Set 'ScanIndexForward' to false to get results in descending order, showing newest items first if your sort key is time-based.

beginner

What happens if you omit the 'ScanIndexForward' parameter in a DynamoDB query?

The query returns results in ascending order by default because 'ScanIndexForward' defaults to true.

In DynamoDB, which parameter controls the order of query results?

A ScanIndexForward

B OrderBy

C SortOrder

D ResultOrder

The 'ScanIndexForward' parameter controls whether query results are ascending (true) or descending (false).

What is the default order of query results in DynamoDB if 'ScanIndexForward' is not set?

A Descending

B Ascending

C Random

D No order

By default, 'ScanIndexForward' is true, so results come back in ascending order.

To get the latest records first in a DynamoDB query, you should set 'ScanIndexForward' to:

A false

B true

C null

D 1

Setting 'ScanIndexForward' to false returns results in descending order, showing newest items first if sorted by time.

If your sort key is a timestamp, which 'ScanIndexForward' value shows oldest items first?

A false

B undefined

C true

D null

True means ascending order, so oldest timestamps appear first.

Which of these is NOT a valid value for 'ScanIndexForward' in DynamoDB?

A null

B false

C true

D "ascending"

'ScanIndexForward' only accepts boolean true or false, not strings like "ascending".

Explain how to control the order of query results in DynamoDB and what the default behavior is.

Think about the boolean parameter that controls sorting direction.

Describe a real-life example where you would want to set 'ScanIndexForward' to false in a DynamoDB query.

Consider when you want to see the latest data at the top.