Text aggregation

What does column 3 represent? How is it derived?

it is the text aggregation based on column 1 --- its kind of list aggregate function

Can some one help on this please

I don't think that any of us are really understanding the question.

let me re-phrase the question

I have two columns Dept and employee in the table dummy

Dept       employee
1              AA
1               BB
1               CC
2               DD
2              EE


Now I would like to do a text aggregation based on Dept. I expect the result in the new column as 

Dept       employee          text Aggregation
1              AA                     AA,BB,CC
1               BB                    AA,BB,CC
1               CC                    AA,BB,CC
2               DD                      DD,EE
2              EE                        DD,EE

In SQL , Something like 
select dept,listagg(employee,',')  within group (order by dept) from dummy
group by dept

will give an answer

1       AA,BB,CC
2        DD,EE

This is my expectation.

can you please let me know how to do it in quick base. Can you please let me know in detail that will be helpful. I am from SQL background.

Thanks

Can you tell us how many child records would you want to float up the text to the parent record? 

This can be done via reverse relationships, for say up a half a dozen or so loops.  But if a Parent can have say 20+ children, at some point it will hurt the performance of the app to have so many looping reverse relationships.

There is no limitations to the child record. They can be N. Do you suggest a different approach to solve this ?

Thanks

There is is not currently a native functionality to float up a text value from a field in "N" child records. 

There are some non native techniques which I have seen posted on the forum which can be use to do the aggregation and display them on a record, but they will not actually be a field that could be used in a report, for example.  They would only exists when viewing a record.

Hi Thanks a lot for your answer. Is there a way to write a query ? to derive that value