I am looking to compare two CSV files to output a change or addition. 
Example:
File 1:
User        Date   Status
Dave         1/1     New
Linda        1/2     Old
Bob           1/3     Old
File 2:
User       Date     Status
Dave        1/1      Old
Dave        1/2      New
Linda       1/2      Old
Tony        1/8      New
If the user from File 1 matches File 2 and either row "date" and "status" have changed then output that information plus any new additions. Expected output
User    Date    Status
Dave      1/1      Old
Dave     1/2       New
Tony     1/8       New
Hi,
You could use the "join " command to achieve functionality.
Please try the below functionality.Please let us know whether it worked.
index=source_file1 souretype=source_file1
|table Date,Status,User
|join type=inner User 
|[search index=source_file2 souretype=source_file2  
|eval Date_file2=Date,Status_file2=Status
|table Date_file2,Status_file2]
|eval match_date=if(Date_file2==Date,1,0),match_status=if(Status_file2==Status,1,0)
|where match_date=1 OR match_status=1
|table User,Date,Status
