copy activity - pre-copy script

Anonymous  Couple of things for which we need details :

1) what is the database (type) on which you are executing your pre copy script?

2) based on the expression : 
@concat('delete from db_name.tbl_name where file_path = ', 'Source/mydata-new/mydata-03-May-2024.csv')

This seems to be pretty static, not sure why you used the concat here?

3. Also as stated by Nikhil, please provide the screenshot of the log of the Copy activity so we see what SQL command was generated and actually executed