Hi,

Index A is indeed in use as Gila suggested earlier.

Index B not being used for query, but it may be important if it is clustered index or Primary Key.

I use below query to evaluate how usefull is my index.

SELECT OBJECT_NAME(s.[object_id]) AS [Table Name], i.name AS [Index Name], i.index_id,

user_updates AS [Total Writes], user_seeks + user_scans + user_lookups AS [Total Reads],

user_updates - (user_seeks + user_scans + user_lookups) AS [Difference]

FROM sys.dm_db_index_usage_stats AS s WITH (NOLOCK)

INNER JOIN sys.indexes AS i WITH (NOLOCK)

ON s.[object_id] = i.[object_id]

AND i.index_id = s.index_id

WHERE OBJECTPROPERTY(s.[object_id],'IsUserTable') = 1

AND s.database_id = DB_ID()

AND user_updates > (user_seeks + user_scans + user_lookups)

AND i.index_id > 1

ORDER BY [Difference] DESC, [Total Writes] DESC, [Total Reads] ASC;