This time I am using the following manual:

https://techcommunity.microsoft.com/t5/azure-synapse-analytics-blog/extracting-sap-data-using-odata-part-7-delta-extraction-using/bc-p/4202197#M976

We are talking about this picture:

What are we trying to do:

1. Lookup: Get a table from source
2. Set variable: Check if the table is empty
3. If empty, write an empty value to variable
4. If filled, get the latest value from column DeltaToken with the help of column CreatedAt

My idea (I assumed that the DeltaToken does increase with time):

@if(equals(activity('ll_delta').output.count, 0), '', max(activity('ll_delta').output.value.DeltaToken))

Error:
The expression 'if(equals(activity('ll_delta').output.count, 0), '', max(activity('ll_delta').output.value.DeltaToken))' cannot be evaluated because property 'DeltaToken' cannot be selected. Array elements can only be selected using an integer index.

His idea:
Order the DeltaToken by its CreatedAt-Time and pull the latest
–> Would anyone mind helping me to achieve this goal? I would appreciate your help