Use inner join, left join or right join for join 2 tables

Question

I'm realizing a project which raises me the next tables:

For being more specific: First table:

'docs' => doc_id, doc_type_type_id, clients_cli_id
where doc_type_type_id

1. invoices
2. reference guides

Second Table:

'client' => cli_id

What I try to do is to join Client with doc that My query is:

Show Client with his invoice and reference guide:

SELECT c.cli_name, d1.doc_file as f1 , d2.doc_file as f2 FROM clients c INNER JOIN docs d1 ON d1.client_cli_id = c.cli_id INNER JOIN docs d2 ON d2.client_cli_id = c.cli_id WHERE d1.doc_fec=d2.doc_fec

Answer 1

    select * from docs
    inner join client on docs.clients_cli_id = client.cli_id
    where doc_type_type_id = 1

Something in this format should give you all invoices joined to client.