Hi,
For getting the substring except MFM from the SQL Server DB itself,
With MySampleData([Business Unit])
AS
(
SELECT 'MFMGOOGLE' UNION ALL
SELECT 'MFMArnoldDeCaprio' UNION ALL
SELECT 'MFMBruceSchwarzenegger' UNION ALL
SELECT 'MFMArnoldDamon' UNION ALL
SELECT 'MFMLeonardoPitt' UNION ALL
SELECT 'MFMBruceWahlberg'
)
SELECT REPLACE([Business Unit], 'MFM','') FROM MySampleData