Get the count based on column in the table in SQL Server 2008R2

Question

Need to get the ColumnName2 values when the right columns having > 1 'Y' value from the below sample table.

ColumnName1 ColumnName2     ColumnName3 ColumnName4 ColumnName5 ColumnName6
----------- --------------- ----------- ----------- ----------- -----------
1           ROWNUMBER1      Y           NULL        NULL        NULL
2           ROWNUMBER2      NULL        Y           NULL        NULL
3           ROWNUMBER3      NULL        NULL        Y           NULL
4           ROWNUMBER4      NULL        NULL        NULL        Y
5           ROWNUMBER5      Y           Y           NULL        NULL
6           ROWNUMBER6      NULL        Y           Y           NULL
7           ROWNUMBER7      NULL        NULL        Y           Y
8           ROWNUMBER8      Y           NULL        NULL        Y
9           ROWNUMBER9      Y           Y           Y           NULL
10          ROWNUMBER10     NULL        Y           Y           Y
11          ROWNUMBER11     Y           NULL        Y           Y
12          ROWNUMBER12     Y           Y           NULL        Y

The result/output should be

ColumnName2
---------------
ROWNUMBER5
ROWNUMBER6
ROWNUMBER7
ROWNUMBER8
ROWNUMBER9
ROWNUMBER10
ROWNUMBER11
ROWNUMBER12

The below query will give the expected result. It is not actually a good query and the actual table having 39 rows so the below query won't help. Please help me to get the count based on column in the table.

SELECT ColumnName2
FROM TableName
WHERE ColumnName3 = 'Y' AND (ColumnName4 = 'Y' OR ColumnName5 = 'Y' OR  ColumnName6 = 'Y')
OR ColumnName4 = 'Y' AND (ColumnName3 = 'Y' OR ColumnName5 = 'Y' OR  ColumnName6 = 'Y')
OR ColumnName5 = 'Y' AND (ColumnName3 = 'Y' OR ColumnName4 = 'Y' OR  ColumnName6 = 'Y')
OR ColumnName6 = 'Y' AND (ColumnName3 = 'Y' OR ColumnName4 = 'Y' OR  ColumnName5 = 'Y')

Answer 1

One option is to unpivot the columns to rows, then aggregate and filter:

select t.columnname2
from tablename t
cross apply (values (columnname3), (columnname4), (columnname5), (columnname6)) as x(columnname)
group by t.columnname2
having sum(case when x.columnname = 'Y' then 1 else 0 end) > 1