Merge Tables based on first non-blank condition

Question

Hi there,I have two tables, each table contains employees and contains an ID, a personal Email, and a work email&nbsp;Unfortunately, they don't match very well, and there will be no way of cleaning the data.&nbsp;What I want is to merge the cols from table 1 and table 2, then the challenge I'm facing is matching them. From the samples below, I want to pull the colums A, B C....etc into table 2 where a match can be found on either, ID, Personal Email or Work Email. In the example, ID 2 matches and pulls the result, whereas Steven entered his ID wrong in table 1, so it doesn't find him, but can find a match by email.&nbsp;My plan is to create a column in table 1, then using lookup checks the 3 conditions, then using coalesce, returns the first non-blank and finds the correct ID from table 2, I can then join the tables.&nbsp;Heres my attempt:&nbsp;Matching_ID = VAR Lookupid = LOOKUPVALUE(Table2[ID], Table2[ID], Table1[ID])VAR LookupPersonalEmail = LOOKUPVALUE(Table2[ID], Table2[Personal Email], Table1[Personal Email])VAR LookupWorkEmail = LOOKUPVALUE(Table2[ID], Table2[Work Email], Table1[Work Email])&nbsp;ReturnCOALESCE(Lookupid, LookupPersonalEmail, LookupWorkEmail)&nbsp;and I get the error:&nbsp;A table of multiple values was supplied where a single value was expected.&nbsp;I've tried doing a filter, or using FirstNonBlankValue, but every which way, I get some error.&nbsp;&nbsp;Any help with this function, or approach would be appriciated&nbsp;&nbsp;Table 1:IDPersonal EmailWork EmailCol A2Josh@emailJosh1@emailA3Amy@emailAmy1@emailB7james@email&nbsp;james1@emailB&nbsp;Table 2:IDPersonal EmailWork EmailCol A from Table 12Josh@email&nbsp;JoshB@emailA4james@email&nbsp;james1@emailB3Amy@emailAmy22@emailB

fowmy · Accepted Answer

JoshB_&nbsp;I did it in a different way, please check:
Col A = 
VAR _ID = [ID]
VAR _PMAIL = [Personal Email]
VAR _WMAIL = [Work Email]
RETURN
MAXX(
    FILTER(
        'Table-1',
        'Table-1'[ID] = _ID || 'Table-1'[Personal Email] = _PMAIL || 'Table-1'[Work Email] = _WMAIL
    ),
    'Table-1'[Col A]
)

&nbsp;

Forum Discussion

Merge Tables based on first non-blank condition

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ID	Personal Email	Work Email	Col A
2	Josh@email	Josh1@email	A
3	Amy@email	Amy1@email	B
7	james@email	james1@email	B

ID	Personal Email	Work Email	Col A from Table 1
2	Josh@email	JoshB@email	A
4	james@email	james1@email	B
3	Amy@email	Amy22@email	B