(MySQL) 2 个外键引用同一个表

Question

On table transaction c_acc and d_acc are based on account.id

How can I achieve the query result as shown below?

The debit and credit in results table is auto summed up based on their type of account in table transaction, whether it's debit account or credit account. I was thinking of two joins account a and account b But I dont know how to implement it. I need help. Thank you!

Table name: accounts

+---------------------------+
|ID | account               |
|---+-----------------------|
|101| cash                  |
|---+-----------------------|
|102| accounts receivable   |
|---+-----------------------|
|103| notes receivable      |
|---+-----------------------|
|104| interest receivable   |
|---+-----------------------|
|105| merchandise inventory |
|---+-----------------------|
|201| accounts payable      |
+---------------------------+

Table name: transaction

+-----------------------------+
|ID|d_acc|c_acc|debit|credit  |
|--+-----+-----+-----+--------|
|1 |101  |102  |10000|10000   |
|--+-----+-----+-----+--------|
|2 |201  |101  |1000 |1000    |
|--+-----+-----+-----+--------|
|3 |101  |102  |300  |300     |
+-----------------------------+

Query result

+-----------------------------------+
|Account              |Debit|Credit |
|---------------------+-----+-------|
|Cash                 |10300|1000   |
|---------------------+-----+-------|
|accounts receivable  |     |10300  |
|---------------------+-----+-------|
|notes receivable     |     |       |
|---------------------+-----+-------|
|interest receivable  |     |       |
|---------------------+-----+-------|
|merchandise inventory|     |       |
|---------------------+-----+-------|
|accounts payable     |1000 |10000  |
+-----------------------------------+

Answer 1

You can union 2 queries and group the results like this:

SELECT
x.account,
SUM(x.debit) AS debit,
SUM(x.credit) AS credit
FROM
(

SELECT
`accounts`.`account`,
`transaction`.`debit`,
0 AS `credit`
FROM
`accounts`
LEFT JOIN `transaction` ON (`accounts`.`ID`=`transaction`.`d_acc`)

UNION

SELECT
`accounts`.`account`,
0 AS `debit`,
`transaction`.`credit`
FROM
`accounts`
LEFT JOIN `transaction` ON (`accounts`.`ID`=`transaction`.`c_acc`)

) x
GROUP BY account

Note: I added backticks because 'transaction' is a reserved keyword