根据重叠限制排除行（SQL）

Question

I was looking at this link , but was still having trouble creating my statement. I have the following query

SELECT SUM(AMT) AS TOTAL, NAME, YEAR 
FROM TABLE WHERE IND='ISVALID' GROUP BY NAME, YEAR

I would get the following results

TOTAL | NAME | YEAR 
====================
10000 | JOHN | 2010  
20500 | PETE | 2009 
12500 | MIKE | 2008 
50500 | MARY | 2008 
50500 | MARY | 2007 
40000 | JANE | 2007 

I would like to exclude 50500 | MARY | 2008, which has an IND column with 'ISVALID' as well. How do I do this?

Answer 1

SELECT SUM(AMT) AS TOTAL, NAME, YEAR 
FROM TABLE 
WHERE IND='ISVALID' AND (NAME <> 'MARY' OR YEAR <> 2008)
GROUP BY NAME, YEAR