Insert query to insert only "unique" value for Excel as an database

Hi All

I am working with excel as an database functionality of AA360, came accross a case where I have to insert data into excel using DB query, if only the value is not existing in the sheet to inserted.

Here are the queries I have tried

1. Insert into [STEP2$$] ([Vorhaben],[verteilt an],[E K Z],[Alle Stellungnahmen da?]) values (SELECT ('$RecSqlDataset[0]$', '$RecSqlDataset[3]$', '$RecSqlDataset[8]$', '$RecSqlDataset[17]$') where not exists (Select [Vorhaben],[verteilt an],[E K Z],[Alle Stellungnahmen da?] from [STEP2$$] where [Vorhaben] = '$RecSqlDataset[0]$'))
2. Insert into [STEP2$$] ([Vorhaben],[verteilt an],[E K Z],[Alle Stellungnahmen da?]) values ('$RecSqlDataset[0]$', '$RecSqlDataset[3]$', '$RecSqlDataset[8]$', '$RecSqlDataset[17]$') where (Select [Vorhaben] from [STEP2$$]) not in '$RecSqlDataset[0]$
3. Insert into [STEP2$$] ([Vorhaben],[verteilt an],[E K Z],[Alle Stellungnahmen da?]) values ('$RecSqlDataset[0]$', '$RecSqlDataset[3]$', '$RecSqlDataset[8]$', '$RecSqlDataset[17]$') Where (Select Count([Vorhaben]) from [STEP2$$] where [Vorhaben]='xyz') = 0

I am able to run the 1st part of query successfully “Insert into [STEP2$$] ([Vorhaben],[verteilt an],[E K Z],[Alle Stellungnahmen da?]) values (SELECT ('$RecSqlDataset[0]$', '$RecSqlDataset[3]$', '$RecSqlDataset[8]$', '$RecSqlDataset[17]$')”

Here Vorhaben is the column in both the input and output file.