Msg 207, Level 16, State 1, Line 1 Invalid column name 'FullName'.
select FullName,
['1-Urgent'], ['2-High'], ['3-Medium (3000)']
from (select FullName,AltBusinessSeverity, total from Mdata) AS ST
PIVOT (
min(FullName) FOR AltBusinessSeverity in (['1-Urgent'], ['2-High'], ['3-Medium (3000)'])
) AS PT