CODEWITHSUNDEEP
mysqlzend-frameworksubqueryzend-db
Rayan Suryadikara
Rayan Suryadikara

Reputation: 247

Subquery By Zend Database Format

I created a query in MYSQL as follows :

select subsql.item_id, subsql.uid, subsql.post_date, subsql.uid_prev,
max(workflow_trans.date) AS pre_date

from (
    select item_id, max(date) AS post_date, uid, uid_prev
    from workflow_trans 
    where uid = 'name' and date <= 'date1' and date >= 'date2'
    group by item_id, uid, uid_prev
) AS subsql

left join workflow_trans on subsql.item_id = workflow_trans.item_id and
subsql.uid_prev = workflow_trans.uid and subsql.post_date > workflow_trans.date

where workflow_trans.date is not null
group by subsql.item_id, subsql.uid, subsql.post_date, subsql.uid_prev
order by subsql.post_date

The In translated it to Zend DB format as follows :

$this->db->select()->from(array("subsql" => $this->db->select()
->from(array($this->_name), array('item_id', 'max(date) AS post_date', 
'uid', 'uid_prev'))
->where("uid = ?", $username)->where("date >= ?", $tgl1)
->where("date <= ?", $tgl2)
->group(array('item_id', 'uid', 'uid_prev'))), 
array('subsql.item_id','subsql.uid',
'subsql.post_date','subsql.uid_prev','max(workflow_trans.date)
as pre_date'))
->joinLeft($this->_name, 'subsql.item_id = workflow_trans.item_id 
and subsql.uid_prev = workflow_trans.uid and subsql.post_date > 
workflow_trans.date')
->where("workflow_trans.date != ?", null)
->group(array('subsql.item_id', 'subsql.uid', 'subsql.post_date',
'subsql.uid_prev'))
->order(array('subsql.post_date'))

Yet the Zend model could not working. i've been reexamined it, and made 3 changes, but still there is something wrong with the formatting. Fresh pair of sharp eyes are appreciated.

ANSWER UPDATE

Hello guys, I already found it, below the running code :

$this->db->select()->from(array("subsql" => $this->db->select()
->from(array($this->_name), array('item_id', 'max(date) AS post_date', 
'uid', 'uid_prev'))
->where("uid = ?", $username)->where("date >= ?", $tgl1)
->where("date <= ?", $tgl2)
->group(array('item_id', 'uid', 'uid_prev'))), 
array('subsql.item_id','subsql.uid','subsql.post_date','subsql.uid_prev'))
->joinLeft(array($this->_name), 'subsql.item_id = workflow_trans.item_id and
subsql.uid_prev = workflow_trans.uid and
subsql.post_date > workflow_trans.date', 
array('max(workflow_trans.date) as pre_date'))
->where("workflow_trans.date is not null")
->group(array('subsql.item_id', 'subsql.uid', 'subsql.post_date',
'subsql.uid_prev'))
->order(array('subsql.post_date'));

You should define the column from joining table in its own join function, and of course I got it wrong on how to handle the null.

Upvotes: 0

Views: 56

Answers (1)

Mehmet S&#214;Ğ&#220;NMEZ
Mehmet S&#214;Ğ&#220;NMEZ

Reputation: 605

If we talks about zf3, this query generates same sql as with yours.

$from = $this->getSql()->select('workflow_trans')
                ->columns(['item_id, max(date) AS post_date, uid, uid_prev', new Literal('max(workflow_trans.date) AS pre_date')])
                ->where(['uid = ?' => 'name'])
                ->where(['date <= ?' => 'date1'])
                ->where(['date >= ?' => 'date2'])
                ->group(['item_id', 'uid', 'uid_prev']);

$query = $this->getSql()->select()
                    ->columns(['item_id, uid, post_date, uid_prev'])
                    ->from(['subsql' => $from])
                    ->join('workflow_trans', 'subsql.item_id = workflow_trans.item_id and subsql.uid_prev = workflow_trans.uid and subsql.post_date > workflow_trans.date', [])
                    ->where(new IsNotNull('workflow_trans.date'))
                    ->group(['subsql.item_id', 'subsql.uid', 'subsql.post_date', 'subsql.uid_prev'])
                    ->order('subsql.post_date');

Upvotes: 1

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