Duplicate columns with inner Join - sql

Question

SELECT
dealing_record.*
,shares.*
,transaction_type.*
FROM
shares
INNER JOIN shares ON shares.share_ID = dealing_record.share_id
INNER JOIN transaction_type ON transaction_type.transaction_type_id = dealing_record.transaction_type_id;
The above SQL code produces the desired output but with a couple of duplicate columns. Also, with incomplete display of the column headers. When I change the
linesize 100
the headers shows but data displayed overlaps
I have checked through similar questions but I don't seem to get how to solve this.

Answer 1

You have duplicate columns, because, you're asking to the SQL engine for columns that they will show you the same data (with SELECT dealing_record.* and so on) , and then duplicates.
For example, the transaction_type.transaction_type_id column and the dealing_record.transaction_type_id column will have matching rows (otherwise you won't see anything with an INNER JOIN) and you will see those duplicates.
If you want to avoid this problem or, at least, to reduce the risk of having duplicates in your results, improve your query, using only the columns you really need, as #ConradFrix already said. An example would be this:
SELECT
dealing_record.Name
,shares.ID
,shares.Name
,transaction_type.Name
,transaction_type.ID
FROM
shares
INNER JOIN shares ON shares.share_ID = dealing_record.share_id
INNER JOIN transaction_type ON transaction_type.transaction_type_id = dealing_record.transaction_type_id;

Answer 2

Try to join shares with dealing_record, not shares again:
select dealing_record.*,
shares.*,
transaction_type.*
FROM shares inner join dealing_record on shares.share_ID = dealing_record.share_id
inner join transaction_type on transaction_type.transaction_type_id=
dealing_record.transaction_type_id;