Re: Get Records from Table A that are not in Table B

You can also try Power Query

let 
    LeadWebsite=  Table.FromRows({{"Mr Smith", "123 Main Street", "123456"} , {"Mr Jones", "456 High Street", "789101"},{"Mrs Peacock","1 London Road","112131"}}, {"Name", "Address", "Telephone Number"}),

    DataBase=Table.FromRows({{"Miss Poppy","4 Ash Crescent","718192"},{"Mr Smith", "123 Main Street", "123456"} , {"Dr Jackson", "20 Roman Close", "415161"},{"Mrs Peacock","1 London Road","112131"}}, {"Name", "Address", "Telephone Number"}),
     
    RemovedRowsList = Table.ToRecords(DataBase), 

    FilteredLeadWebsite= Table.RemoveMatchingRows(LeadWebsite,RemovedRowsList)

in
    FilteredLeadWebsite