Hello, I have the following two tables set up and working:
Contract - A table with contract as unique key
REF_ROWS("Nomination", "Contract")
Nominations (One contract - Many nominations)
In my Nomination table, I have the following sample data:
Nomination_ID | Date | Contract | Vessel Name | Quantity
abcde123 20/07/2021 1 A 1,000
defgh234 20/07/2021 2 A 2,000
hijkl456 21/07/2021 3 B 3,000
I would like to add, say, another column, Quality, for distinct values of Date and Vessel Name.
In SQL:
select
distinct date, vessel_name
from nominations
The results of this query would be:
Date | Vessel Name
20/07/2021 A
21/07/2021 B
And from here, the values for the new column Quality would only need to be added once per date and vessel, instead of multiple times in the Nomination table above.
Now, the user only has to update the Quality
column twice:
Date | Vessel Name | Quality
20/07/2021 A 1%
21/07/2021 B 2%
Instead of 3 times (per Nomination ID
๐
Nomination_ID | Date | Contract | Vessel Name | Quantity | Quality
abcde123 20/07/2021 1 A 1,000 1%
defgh234 20/07/2021 2 A 2,000 1%
hijkl456 21/07/2021 3 B 3,000 2%
To try and summarize:
I am trying to add another column of information to the existing table Nominations
, and want to prevent the user from adding the same information multiple times for a given distinct group of Date | Vessel Name
.
Am a bit confused as to how I would accomplish this in AppSheet - do I need to create a new table Nominations_With_Quality
in Google Sheets to house this new column? Or is there any way I can re-use my existing table Nominations
Iโve read this post about 5 times now, but I canโt understand exactly what you want.
When you say you want distinct values of Vessel and Date, from your example data, are you expecting {A,B}
and {20/7/21,21/7/21}
to be returned? Should these Lists be in separate columns, or what?
This sentence in fact make your point even more confusing. I donโt even know how to ask any question to clarify it. Could you perhaps say it in a different way?
Itโd probably help if you very explicitly showed what result you expect for the new column, based on the above sample data.
You are free to add new columns to your GSheet (then โregenerateโ the Table), or you can add Virtual Columns.
Thank you for taking the time to reply to my post - I have read your comments and updated the post, hopefully it is clearer now what I am trying to accomplish.
Ahhh! I thought you were wanting to save these distinct groups as data.
Ok. To start we need an expression thatโll return TRUE if there is no record with the same vessel/date combo that already has a [Quality] value.
ISNOTBLANK( FILTER(
Nominations ,
AND(
ISNOTBLANK( [Quality] ) ,
[date] = [_THISROW].[date] ,
[vessel] = [_THISROW].[vessel]
)
) )
Then you can probably just stick that into Editable_if for the [Quality] column.
Does that work for you?
Hey Marc,
Iโve just had time to give this a go, and the formula works, although I had to change ISNOTBLANK
to ISBLANK
.
ISBLANK( FILTER(
Nomination,
AND(
ISBLANK( [Oil Content] ),
[Nomination Date] = [_THISROW].[Nomination Date],
[Vessel] = [_THISROW].[Vessel]
)
) )
From my understanding, this column is editable if this table, Nomination, is filtered for rows where there are no quality values for a given combination of date / vessel.
I have Show, Editable, Require toggled on for the column โOil Contentโ.
The column is newly created and has not been populated with any values.
I could not get the โOil Contentโ to show up in the detail view:
Kindly let me know what I might have missed, in case my explanation was not clear, I can also post screenshots or share a copy of my app
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