How to compare column values of two tables in where clause - yii2

Here is the scenario I am trying to use
game_studentanswer
--> studentanswerid (primary)
--> questionid
--> answerid (this is the answer selected by user)
game_question
--> questionid
game_officialanswer
--> officalanswerid (primary)
--> questionid
--> answerid (this is the answerid for correct answer)
i am trying to create this query in Yii2:
SELECT COUNT(*) FROM `game_studentanswer` LEFT JOIN `game_question` ON `game_studentanswer`.`questionid` = `game_question`.`questionid` LEFT JOIN `game_officialanswer` ON `game_question`.`questionid` = `game_officialanswer`.`questionid` WHERE (`userid`='1') AND (`game_studentanswer`.`answerid` <> `game_officialanswer`.`answerid`)
Here is the code
$query = MyGameStudentanswer::find()->joinWith('question.gameOfficialanswers')
->where(['userid'=>$userid])->andWhere(['answerid' => 'question.gameOfficialanswers.answerid']);
My problem is the "AndWhere()" part of the code - instead of comparing two columns - it assumes 'question.gameOfficialanswers.answerid' as a string value as a result the query that Yii2 performs is this
SELECT COUNT(*) FROM `game_studentanswer` LEFT JOIN `game_question` ON `game_studentanswer`.`questionid` = `game_question`.`questionid` LEFT JOIN `game_officialanswer` ON `game_question`.`questionid` = `game_officialanswer`.`questionid` WHERE (`userid`='1') AND (`game_studentanswer`.`answerid` = 'game_officialanswer.answerid')
Any help will be appreciated


Was able to find a workaround by using ` quotes around the table and column names.
$query = MyGameStudentanswer::find()->joinWith('question.gameOfficialanswers')//->onCondition(['answerid' => 'question.gameOfficialanswers.answerid'])
->where(['userid'=>$userid])->andWhere('`game_studentanswer`.`answerid` = `game_officialanswer`.`answerid`');//->onCondition('questionid=game_officalanswer.questionid');

Related

How to pull in null values when searching for specific document name

I am having issues pulling in null values in my query. I am looking for patients who have a specific document name in their chart but also want to show patients who do not have this specific document name as well. Right now my code is only pulling in the patients with the document name History and Physical (Transcription) but I need to see Null values as well. Below is my code:
snip of code
SELECT CV3ClientVisit.ClientDisplayName, CV3ClientVisit.CurrentLocation, CV3ClientVisit.IDCode, CV3ClientVisit.VisitIDCode, CV3ClientVisit.VisitStatus, CV3ClientVisit.TypeCode, CV3ClientDocumentCUR.DocumentName
FROM CV3ClientVisit INNER JOIN
CV3ClientDocumentCUR ON CV3ClientVisit.GUID = CV3ClientDocumentCUR.ClientVisitGUID
WHERE (CV3ClientVisit.VisitStatus = 'ADM') AND (CV3ClientVisit.TypeCode = 'INPATIENT ADMIT') AND (CV3ClientDocumentCUR.DocumentName = 'History & Physical (transcription)' OR CV3ClientDocumentCUR.DocumentName IS NULL )

Use a LEFT JOIN with the condition in the ON clause:
SELECT cv.ClientDisplayName, cv.CurrentLocation, cv.IDCode,
cv.VisitIDCode, cv.VisitStatus, cv.TypeCode, cd.DocumentName
FROM CV3ClientVisit cv LEFT JOIN
CV3ClientDocumentCUR cd
ON cv.GUID = cd.ClientVisitGUID AND
cd.DocumentName = 'History & Physical (transcription)'
WHERE cv.VisitStatus = 'ADM' AND
cv.TypeCode = 'INPATIENT ADMIT' ;
I also added table aliases to simplify the query.

MySQL query getting a string value from query result

I have a query as follows:
SELECT *
FROM tb_circulares LEFT JOIN tb_colegios ON tb_circulares.colegio_circular = tb_colegios.id_colegio
LEFT JOIN tb_circulares_clase ON tb_circulares.codigo_circular = tb_circulares_clase.circular
LEFT JOIN tb_clases ON tb_circulares_clase.clase = tb_clases.id_clase
WHERE colegio_circular = 17
The query output shows three rows.
One of the row columns is the value for the field tb_circular_clase.nombre_clase
I would like to get a string containing the three resulting values for tb_circular_clase.nombre_clase.
For example:
row1-> nombre_clase = "1º primaria"
row2-> nombre_clase = "3ª secundaria"
row3-> nombre_clase = "4º primaria"
Is it possible to get a resulting query field with the final value?
`resultado = "1º primaria - 3ª secundaria - 4º primaria"
Thanks

Sounds like you're after group_concat(), which is an aggregation function concatenating all values of a group.
SELECT group_concat(nombre SEPARATOR ' - ') resultado
FROM tb_circulares
LEFT JOIN tb_colegios
ON tb_circulares.colegio_circular = tb_colegios.id_colegio
LEFT JOIN tb_circulares_clase
ON tb_circulares.codigo_circular = tb_circulares_clase.circular
LEFT JOIN tb_clases
ON tb_circulares_clase.clase = tb_clases.id_clase
WHERE colegio_circular = 17;

How to use "MAX" in codeigniter where?

There is $this->db_selec_max(); for select max element from row set in select but I want to use max in where. How to use "MAX" in codeigniter where? I want to convert following query in to codeigniter form
My query
SELECT rq_id, rq_plant_4sale_code, rq_serial_number, rq_quantity_requested, rq_requester_farm_id,
rq_fulfiller_farm_id, rqpri_description, rqrem_remark,rqrem_remark_datetime, rq_created_datetime,
plsal_name_botanical, plsal_name_english, pot_code, rqpri_description
FROM (reqn_requisitions)
LEFT JOIN reqn_requisition_priorities ON(rq_priority_rank=rqpri_rank)
LEFT JOIN reqn_requisition_remarks ON(rq_id=rqrem_reqn_id)
LEFT JOIN tukai_plants_4sale ON(rq_plant_4sale_code=plsal_id)
LEFT JOIN tukai_pots ON(plsal_pot_id=pot_id)
WHERE rqrem_remark_datetime IN(SELECT MAX(rqrem_remark_datetime) AS dt FROM reqn_requisition_remarks GROUP BY rqrem_reqn_id ) AND rq_challan_id=0'
I am trying like this
$this->db->select("rq_id, rq_plant_4sale_code, rq_serial_number, rq_quantity_requested, rq_requester_farm_id,
rq_fulfiller_farm_id, rqpri_description, rqrem_remark,rqrem_remark_datetime, rq_created_datetime,
plsal_name_botanical, plsal_name_english, pot_code, rqpri_description ");
$this->db->join('tukai_plants_4sale',
'tukai_plants_4sale.plsal_id = reqn_requisitions.rq_plant_4sale_code','left');
$this->db->join('tukai_pots',
'tukai_pots.pot_id = tukai_plants_4sale.plsal_pot_id','left');
$this->db->join('reqn_requisition_remarks',
'reqn_requisition_remarks.rqrem_reqn_id = reqn_requisitions.rq_id','left');
$this->db->order_by("rq_id","desc");

For complex where clause conditions you can use,
$this->db->where('<where condition here>', NULL, FALSE);
From docs:
$this->db->where() accepts an optional third parameter. If you set it to FALSE, CodeIgniter will not try to protect your field or table names with backticks.
Try below code:
/* Replace table_name with appropriate table names */
$this->db->select("table_name.rq_id, table_name.rq_plant_4sale_code, table_name.rq_serial_number, table_name.rq_quantity_requested, table_name.rq_requester_farm_id,
table_name.rq_fulfiller_farm_id, table_name.rqpri_description, rqrem_remark,table_name.rqrem_remark_datetime, table_name.rq_created_datetime,
table_name.plsal_name_botanical, table_name.plsal_name_english, table_name.pot_code, table_name.rqpri_description ");
$this->db->from('reqn_requisitions');
$this->db->join('reqn_requisition_priorities','reqn_requisitions.rq_priority_rank = reqn_requisition_priorities.rqpri_rank','left');
$this->db->join('reqn_requisition_remarks','reqn_requisition_remarks.rqrem_reqn_id = reqn_requisitions.rq_id','left');
$this->db->join('tukai_plants_4sale','tukai_plants_4sale.plsal_id = reqn_requisitions.rq_plant_4sale_code','left');
$this->db->join('tukai_pots','tukai_pots.pot_id = tukai_plants_4sale.plsal_pot_id','left');
$this->db->where('reqn_requisition_remarks.rqrem_remark_datetime IN(SELECT MAX(rqrem_remark_datetime) AS dt FROM reqn_requisition_remarks GROUP BY rqrem_reqn_id', NULL, FALSE);
$this->db->where('table_name.rq_challan_id', 0);
$this->db->order_by("table_name.rq_id","desc");
$query = $this->db->get();
return $query->result();
An alternative:
If your query (anyhow) cannot be written using CI's Active Record, you can always use a simple method:
$this->db->query('<your SQL query here>');
For example:
$query = $this->db->query('SELECT rq_id, rq_plant_4sale_code, rq_serial_number,rq_quantity_requested, rq_requester_farm_id,rq_fulfiller_farm_id, rqpri_description,rqrem_remark,rqrem_remark_datetime, rq_created_datetime,
plsal_name_botanical, plsal_name_english, pot_code, rqpri_description
FROM (reqn_requisitions)
LEFT JOIN reqn_requisition_priorities ON(rq_priority_rank=rqpri_rank)
LEFT JOIN reqn_requisition_remarks ON(rq_id=rqrem_reqn_id)
LEFT JOIN tukai_plants_4sale ON(rq_plant_4sale_code=plsal_id)
LEFT JOIN tukai_pots ON(plsal_pot_id=pot_id)
WHERE rqrem_remark_datetime IN(SELECT MAX(rqrem_remark_datetime) AS dt FROM reqn_requisition_remarks GROUP BY rqrem_reqn_id ) AND rq_challan_id=0');
return $query->result();

Update table using alias

I need to fill some fields in a table getting informations from other records of the same table.
I tried to write a query to explain what I want to do:
update globale2
set
nita = t.nita,
tita = t.tita,
notaita = t.notaita
where
neng = t.neng and
nita is null
(select nita, neng, tita, notaita from globale where uris='mma' and nita is not null) as t
edit to eplain better:
every records have these fields: "nita", "tita", "notaita", "neng" ("neng" cannot be null)
I want to fill these fields: "nita", "tita", "notaita" (where "nita" is empty)
with the same values from another record where "neng" equals the other "neng"

You can however, join the two tables.
UPDATE globale2 g
INNER JOIN globale gg
ON g.neng = gg.neng
SET g.nita = gg.nita,
g.tita = gg.tita,
g.notaita = gg.notaita
WHERE g.nita IS NULL
AND gg.uris = 'mma'
AND gg.nita IS NOT NULL

assume there is a table A_temp, with two columns 'one' and 'two'.
TABLE A_temp
ONE TWO
1 2
this is the present status of the table.
The query
UPDATE (SELECT * FROM A_temp ) A SET one = A.two where one = '1'
updates the table as
ONE TWO
2 2
Hope you get the idea and that it helps..

can't get select query to work

I want to use a Select query from mysql database in C:
mysql_query(conn,"SELECT SI AS SUBSCRIBER_ID ,TG2 AS TAG_ID, SUM(CTR) AS NBR FROM (SELECT H.SUBSCRIBER_ID AS SI, TG.TAG_ID AS TG1,T.TAG_ID AS TG2, COUNT(TG.TAG_ID) AS COUNTER,CASE WHEN (TG.TAG_ID = T.TAG_ID) THEN COUNT(TG.TAG_ID) ELSE 0 END AS CTR from content_hits H left join CONTENT_TAG TG ON TG.CONTENT_ID = H.CONTENT_ID LEFT JOIN TAG T ON 1= 1 GROUP BY H.SUBSCRIBER_ID, TG.TAG_ID,T.TAG_ID) AS TAB GROUP BY SI,TG2");
After that, I want to use 'NBR' to fill an array of one dimension.
I tried this:
result = mysql_store_result(conn);
while ((row = mysql_fetch_row(result)))
{
t[i]=*row['NBR'];
printf("%d",t[i]);
}
But it didn't work.

You cannot access the row columns by name like you have t[i]=*row['NBR'];. Use for example fields = mysql_fetch_fields(result); to get the column names and iterate through the fields array to find which column id 'NBR' has. This id can then be used in t[i]=row[id];. This is all in the mysql connectors doc http://dev.mysql.com/doc/refman/5.0/en/mysql-fetch-fields.html