should i use merge or append ?

[Paulyeo11]

Hi All

I need to load different company sales invoice table to PBI as below :-

After load them to PBI , i need to combine both table into 1 table.

I have 2 choice , using merge or append. 

Can some one share with me which is better ?

I also load below file :-

[Fowmy · Accepted solution]

@Paulyeo11 

Merge will join two tables horizontally adding columns based on matching key columns like vlookup in Excel from the 2nd table, but append, you add rows from the 2nd or more tables to the 1st table the end.

Please refer to: https://radacad.com/append-vs-merge-in-power-bi-and-power-query

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[Paulyeo11]

Hi Sir

The doc you share is very good. Thank you very much.

[Anonymous]

@Paulyeo11  When you have additional rows of data that you'd like to add to an existing query, you should append the query.