Codeigniter查询：当我使用sum Select函数从另一个表中获取数据时，如何从表中的列中获取所有记录

Question

the case is i have this table called journal_type
id_type | account_no | description |
---------------------------------------------
1 | 1.1 | bank
2 | 1.2 | bank & cash
3 | 1.3 | sale
4 | 1.4 | stock
5 | 1.5 | office tools
6 | 1.6 | payroll

and the second table called journal is something like this
id_transaction | id_type | debit | date_of_transaction
---------------------------------------------
1 | 1 | 50.00 | 08-22-2018
2 | 3 | 90.00 | 08-21-2018
3 | 1 | 80.00 | 08-17-2018

what i do so far is sum the data from second table's debit column based on month(in this case is august) and i want to group it by the id_type. so it would be something like id_type1 = 130.00 and id_type3 = 90.00
but i want the output is printing all the record from the id_type column in first table and let the other column null when it don't used. maybe the result i want is something like this

id_type | account_no | description | debit
---------------------------------------------
1 | 1.1 | bank | 130
2 | 1.2 | bank & cash| 0
3 | 1.3 | sale | 90
4 | 1.4 | stock | 0
5 | 1.5 | office tools |0
6 | 1.6 | payroll | 0

public function get_finance_debitkredit($periode1, $periode2){
  $query = $this->db->select('sum(debit) as debit, journal_type.account_no, journal_type.description, journal.id_type')
          ->from('journal_type')
          ->join('journal', 'journal.id_type = journal_type.id_type', 'left outer')
          ->group_by('journal.id_type')
          ->where('date_of_transaction >=', $periode1)
          ->where('date_of_transaction <=', $periode2)
          ->order_by('journal_type.account_no')
          ->get();
    return $query;  
}

but so far what I get is that it's only printed the record data that have the transaction (in this case is the id_type 1 and id_type_3) so only 2 row that appear. can i make all the 6 row of journal_type appear like what i want with some change of the query. that code is from my model in codeigniter

Answer 1

You first need to create seperate table for that records and then need to left join with that table. Use following query it will give the result you want

public function get_finance_debitkredit($periode1, $periode2){
$query = $this->db->select('finl_tbl.debit, journal_type.account_no, journal_type.description, journal_type.id_type')
      ->from('journal_type')
      ->join('(SELECT sum(debit) as debit,id_type FROM journal WHERE date_of_transaction >='.$periode1.' AND date_of_transaction <='.$periode2.' group by id_type) as finl_tbl', 'finl_tbl.id_type = journal_type.id_type', 'left')
      ->order_by('journal_type.account_no')
      ->get();
return $query;  
}