Combining two queries into one without using UNION ALL

Question

I have the following two mysql queries and I am trying to combine them into one.

Query 1:

$getData = $this->db->query("SELECT *,accounts.name AS DebitAccountName ,debit_side.amount AS DebitAmount
    FROM credit_side
    LEFT JOIN debit_side ON debit_side.transaction_id_dr = credit_side.transaction_id_cr
    LEFT JOIN transaction_info ON transaction_info.transaction_id = credit_side.transaction_id_cr
    LEFT JOIN accounts ON accounts.code = credit_side.account_code 
    WHERE debit_side.account_code='1001'");

Query 2:

 $getData = $this->db->query(SELECT *,accounts.name AS CreditAccountName,credit_side.amount AS CreditAmount
    FROM debit_side
    LEFT JOIN credit_side ON debit_side.transaction_id_dr = credit_side.transaction_id_cr
    LEFT JOIN transaction_info ON transaction_info.transaction_id = debit_side.transaction_id_dr
    LEFT JOIN accounts ON accounts.code = debit_side.account_code 
    WHERE credit_side.account_code='1001'");

I have tried UNION ALL but this is actually not working in this case, The problem is when I echo $DebitAccountName it displays the results of $CreditAccountName as well, which I don't want.

I am using Codeigniter, and in my view file I aim to echo the results like this.

 <?php if(count($records) > 0) { ?>

<?php foreach ($records as $row){ ?>

<?php echo $row['DebitAccountName']; ?> 
  <?php echo $row['DebitAmount']; ?>

<?php echo $row['CreditAccountName']; ?> 
  <?php echo $row['CreditAmount']; ?>

Would you please kindly help me get the two queries into one?

Thanks in Advance :)

Answer 1

I have combined these queryies

        $data   =   array(
                  'debit_side.account_code    Code',
                  'group_concat(distinct accounts.name) as DebitAccount',
                  'group_concat(debit_side.amount) as DebitAmount',
                  'group_concat(transaction_info.voucher_date) as DebitVoucherDate',
                  '(SELECT group_concat(distinct accounts.name) as CreditAccount FROM (accounts)
                    left JOIN debit_side ON accounts.code = debit_side.account_code
                    left JOIN credit_side ON debit_side.transaction_id_dr = credit_side.transaction_id_cr
                    left JOIN transaction_info ON transaction_info.transaction_id = credit_side.transaction_id_cr
                    group by credit_side.account_code
                    having credit_side.account_code = `Code`) as CreditAccount',
                  '(SELECT  group_concat(credit_side.amount) as CreditAmount FROM (accounts)
                     left JOIN debit_side ON accounts.code = debit_side.account_code
                     left JOIN credit_side ON debit_side.transaction_id_dr = credit_side.transaction_id_cr
                     left JOIN transaction_info ON transaction_info.transaction_id = credit_side.transaction_id_cr
                   group by credit_side.account_code
                   having credit_side.account_code = `Code`) as CreditAmount',  
                  '(SELECT  group_concat(transaction_info.voucher_date) as CreditVoucherDate FROM (accounts)
                    left JOIN debit_side ON accounts.code = debit_side.account_code
                    left JOIN credit_side ON debit_side.transaction_id_dr = credit_side.transaction_id_cr
                    left JOIN transaction_info ON transaction_info.transaction_id = credit_side.transaction_id_cr
                    group by credit_side.account_code
                    having credit_side.account_code = `Code`) as CreditVoucherDate'

                );
    $this->db->select($data);
    $this->db->from('accounts');
    $this->db->join('credit_side','accounts.code = credit_side.account_code','left');
    $this->db->join('debit_side','debit_side.transaction_id_dr = credit_side.transaction_id_cr','left');
    $this->db->join('transaction_info','transaction_info.transaction_id = credit_side.transaction_id_cr','left');
    $this->db->group_by('debit_side.account_code');
    $this->db->order_by('debit_side.account_code','ASC');
    $query  =   $this->db->get();
    return  $query->result_array();

See Edits here too

How to create General Ledger/T-Account using PHP Mysql

Well here is a modified and optimized version of this query thanks to @vyegorov

Strange Behaviour of Group by in Query which needs to be optimized

Answer 2

Why don't you use SELECT from both tables (debit_side and credit_side)? Of course with all JOINs you need for each table.

Answer 3

For simplicity sake, I've left out the transaction_info JOIN:

SELECT debacc.name AS DebitAccountName, debit_side.amount AS DebitAmount,
    credacc.name AS CreditAccountName, credit_side.amount AS CreditAmount
FROM debit_side
LEFT JOIN credit_side ON debit_side.transaction_id_dr = credit_side.transaction_id_cr
LEFT JOIN accounts credacc ON credacc.code = credit_side.account_code
LEFT JOIN accounts debacc ON debacc.code = debit_side.account_code
WHERE debit_side.account_code='1001'

This query references the accounts table twice, once for debit side, once for credit side. This allows you to show info from both sides of the transaction.