How to compare values across rows and columns

[maingirl]

I have two searches with  three fields in common but two field that differ. I'm trying to find returns  that don't have a matching sale for that company_name, mid, and card_number. The return and sales fields are both dollar amounts. 

"total" is the dollar amount of the transaction, return or sale

 index=X sourcetype=Y  earliest=-1d@d latest=@d
| where transaction_type= "refund"
| stats values(total) as returns by company_name, mid, card_number
| append
[  search index=X sourcetype=Y earliest=-30d@d latest=@d
   |  where transaction_type= "sale"
   | stats values(total) as sales by company_name, mid, card_number ]

Currently I have this search that pulls all return transactions from the past day, as well as every sale from the past month, the results look like this 
   
     company.      MID.       card num.        returns   sales
+-------------------------------------------------------------------+
 | company A | 1234 | 1234***7890 |  50.00 |                  |
 | company B | 1254 | 1234***1234 |  80.00 |                  |
 | company C | 1236 | 1234***1230 |  75.00 |                  |
 | company A | 1234 | 1234***7890 |               | 50.00     |
 | company B | 1254 | 1234***1234 |               | 30.00     |
 | company C | 1236 | 1234***1230 |               | 75.00     |

You can see company B has refunded the card number 1234***1234 for the amount of $80.00,  but there was not a sale to that card in that amount. I would like my search to exclusively display the rows (with the return amount only, not any sale numbers) where this happens. so Ideally the search would have returned just one row:

   company.      MID.       card num.        returns 
+------------------------------------------------------+
 | company B | 1254 | 1234***1234 |  80.00 |                  

[richgalloway]

See if this helps.

index=X sourcetype=Y  earliest=-1d@d latest=@d
| where transaction_type= "refund"
| stats values(total) as returns by company_name, mid, card_number
| append
[  search index=X sourcetype=Y earliest=-30d@d latest=@d
   |  where transaction_type= "sale"
   | stats values(total) as sales by company_name, mid, card_number ]
| stats values(*) as * by company, mid, card_number
| where returns != sales
| table company mid card_number returns

[somesoni2]

Try this

 index=X sourcetype=Y  (transaction_type= “refund" earliest=-1d@d latest=@d) OR (transaction_type= “sale" earliest=-30d@d latest=@d) 
| eval sales=if(transaction_type= “sale”, total,0) 
| eval returns=if(transaction_type= “ refund”, total,0)
| stats values(sales) as sales sum(returns) as returns by company_name, mid, card_number
| where sales!=returns