Hi I have input.csv and Lookup.csv. I have multiple matching records in Lookup.csv. After lookup how do i get all the related records from Lookup.csv. Below is my requirements. Please help me finding  solution for this, any suggestions will be of great helpful to me, Thanks in advance for you time and suggestions, With CSVRecordLookupService, im getting only last record in lookup.csv   input.csv col1,col2,col3,col4 col1,2,col3,col4 col1,4,col3,col4 col1,6,col3,col4 col1,8,col3,col4 Lookup.csv col2,col5,col6,col7,col8 2,abc,China,123,col8 4,def,USA,118,col8 8,qwe,Canada,118,col8 8,zyx,England,118,col8   Output as json [ {   "col1" : "col1",   "col2" : "8",   "col3" : "col3",   "col4" : "col4",   "col6" : null,   "sub" : [{       "col5":"qwe",       "col6":"Canada",       "col7":"118",       "col8":"col8"   },{       "col5":"zyx",       "col6":"England",       "col7":"118",       "col8":"col8"   }] }, {   "col1" : "col1",   "col2" : "2",   "col3" : "col3",   "col4" : "col4",   "col6" : null,   "sub" : [{...}] } ] ... View more