sql - ignore column in minus statement -


I am unable to find a solution to this problem.

There are two tables from zero to each other. 

  Select Table A Minus from Table A, Column B, Column C, Select Column A, Column B, Column Select from C Table B.

The tableA.columnC is required, though this table will not match B.columnC, so the minus statement will return both records.

Is the column a way to ignore C's minus statement but still return the result?

- Thank you

PS A small background on this problem I have a transaction table, the date of purchase, the amount billed, the item purchased (sometimes listed) Is, sometimes not), is a unique identifier for the buyer's account number and purchase.

This table contains both purchases and reversals. Therefore, if a person has bought an item for 10.00 and then returns that item then it is -10.00. In some cases a person purchases the same day, will return and buy the item again. This data is from third parties.

Unfortunately, no amount works in this case, I need to line up all the purchases in line detail which has not been reversed.

I was able to advise and use this post to get the right information:

However, from this table, I need more information than this information Which I am using to give a discount from returns.

This is the reason why I want to help with the above details.

Some of these rows should work: 

  column A , Select column A from column B, from column C where it is not present (Select 1 from table B, where a.columnA = b.columnA and a.columnB = b.columnB), select
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