I am trying to make a query, which returns tipo_id from a table, depending on the value of this I want to join with another table, for example if tipo_id is 1 I want to join with table called p_read if tipo_id i want to join tv_read
this is what I tried to do.
SELECT ec.id,ec.estado,fv.id,fv.num_factura,fv.importe,fv.iva,fv.total,fv.fecha_consumo_inicio,fv.fecha_consumo_fin,
fv.fecha_factura, fv.fichero, c.total, l.tipo_id, lp.id_consumo FROM aldroges8.factura_venta fv
INNER JOIN aldroges8.lectura l ON fv.id=l.facturaVenta_id
INNER JOIN aldroges8.factura_cobro fc ON fc.facturaventa_id = fv.id
INNER JOIN aldroges8.cobros c ON c.id=fc.cobros_id
INNER JOIN aldroges8.estado_cobros ec ON ec.id = c.estado
IF (l.tipo_id=1)
INNER JOIN aldroges8.lectura_potencia lp ON l.id=lp.id
ELSE IF (l.tipo_id =3)
INNER JOIN aldroges8.lectura_tv_gas lp ON lp.id=l.id
WHERE fv.factura_enviada=1 AND fv.suministro_id=:id_contrato ORDER BY fv.fecha_factura DESC;
But i am getting this error.
SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'IF (l.tipo_id==1)
INNER JOIN aldroges8.lectura_potencia lp ON l.id=lp.id
ELSE' at line 7
So I want to know if there is a way on doing this if staments on a query, or do I need to make another query with tipo_id, thanks in advance
SELECT ec.id,ec.estado,fv.id,fv.num_factura,fv.importe,fv.iva,fv.total,fv.fecha_consumo_inicio,fv.fecha_consumo_fin,
fv.fecha_factura, fv.fichero, c.total, l.tipo_id,
/* Used case when statement to get the required result in that column */
case when l.tipo_id=1 then lp_1.id_consumo
when l.tipo_id=3 then lp_3.id_consumo end as id_consumo
FROM aldroges8.factura_venta fv
INNER JOIN aldroges8.lectura l ON fv.id=l.facturaVenta_id
INNER JOIN aldroges8.factura_cobro fc ON fc.facturaventa_id = fv.id
INNER JOIN aldroges8.cobros c ON c.id=fc.cobros_id
INNER JOIN aldroges8.estado_cobros ec ON ec.id = c.estado
left join aldroges8.lectura_potencia lp_1 ON l.id=lp_1.id
left join aldroges8.lectura_tv_gas lp_3 ON lp_3.id=l.id
WHERE fv.factura_enviada=1 AND fv.suministro_id=:id_contrato ORDER BY fv.fecha_factura DESC;
I would write this with the condition in the on clause and then use coalesce() in the select:
SELECT ec.id, ec.estado, fv.id, fv.num_factura, fv.importe, fv.iva,
fv.total, fv.fecha_consumo_inicio, fv.fecha_consumo_fin,
fv.fecha_factura, fv.fichero, c.total, l.tipo_id,
coalesce(lp_1.id_conumo, lp_3.id_consumo) as id_consumo
FROM aldroges8.factura_venta fv INNER JOIN
aldroges8.lectura l
ON fv.id = l.facturaVenta_id INNER JOIN
aldroges8.factura_cobro fc
ON fc.facturaventa_id = fv.id INNER JOIN
aldroges8.cobros c
ON c.id = fc.cobros_id INNER JOIN
aldroges8.estado_cobros ec
ON ec.id = c.estado LEFT JOIN
aldroges8.lectura_potencia lp_1
ON l.id = lp_1.id AND l.tipo_id = 1 LEFT JOIN
aldroges8.lectura_tv_gas lp_3
ON lp_3.id = l.id AND l.tipo_id = 3
WHERE fv.factura_enviada = 1 AND
fv.suministro_id = :id_contrato
ORDER BY fv.fecha_factura DESC;
The difference between doing the comparison in the ON verses in a CASE expression may seem subtle, but it can be important.
If there are multiple matches in either table, then putting the condition in the SELECT will result in duplicate rows.
Related
So I'm having a slight problem with having to save price on a product in two different tables due to a few reasons. Is it possible to merge two columns into one? I know UNION exists but does it work with LEFT JOIN's?
Any pointers is much appreciated.
Best Regards
SELECT
si.id AS shop_item_id,
si.item_price,
s.logo_file_name,
p.cat_id AS category_id,
api.item_price AS api_price,
MAX(c.campaign_desc) AS campaignDesc,
MAX(c.campaign_type_id) AS campaignType,
MAX(c.shop_id) AS campaign_shop_id,
MAX(ct.image_name) AS campaignLogo
FROM
shop_item si
LEFT JOIN
shop s ON
s.id = si.shop_id
LEFT JOIN
product p ON
si.product_id = p.id
LEFT JOIN
campaign_category cc ON
cc.category_id = p.cat_id
LEFT JOIN
campaign c ON
c.id = cc.campaign_id AND
c.shop_id = si.shop_id AND
c.show_in_pricetable = 1 AND
NOW() BETWEEN c.date_from and c.date_to
LEFT JOIN
campaign_type ct ON
c.campaign_type_id = ct.id
LEFT JOIN
shop_api_item api ON
si.rel_feed_api = api.unique_id AND si.shop_id = api.shop_id
WHERE
si.`product_id` = 586 AND
s.`active_shop` = 1
GROUP BY
s.name,
si.id ,
si.item_price
ORDER BY
si.`item_price`,
si.`shop_id`,
c.`campaign_desc` DESC
It looks like you would benefit from the COALESCE() function.
SELECT
si.id AS shop_item_id,
COALESCE(si.item_price, api.item_price) AS coalesced_price,
...
COALESCE() takes multiple arguments, and returns the first argument that is not NULL.
I intend to do an update based on join, but getting an error. What is missing?
update
vna.patients,
vna.patient_observations,
vna.studies,
vna.series,
vna.instances,
vna.sop_classes,
vna.files,
vna.modalities,
vna.issuers
join patient_observations on atients.patient_id=patient_observations.patient_id
join studies
on patient_observations.study_id=studies.study_id
AND studies.patient_id=patients.patient_id
join series
on series.study_id=studies.study_id
join instances
on instances.series_id=series.series_id
join sop_classes
on sop_classes.sop_class_id=instances.sop_class_id
join files
on files.instance_id=instances.instance_id
left join modalities
on modalities.modality_id=series.modality_id
left join issuers
on (patients.issuer_of_patient_identifier=issuers.issuer_id)
set PATIENT_NAME='AAPM'
WHERE PATIENT_IDENTIFIER='TG18-2002';
ERROR 1066 (42000): Not unique table/alias: 'patient_observations'
You don't need to specify table names again which appears in join part
UPDATE
vna.patients
JOIN patient_observations
ON patients.patient_id = patient_observations.patient_id
JOIN studies
ON patient_observations.study_id = studies.study_id
AND studies.patient_id = patients.patient_id
JOIN series
ON series.study_id = studies.study_id
JOIN instances
ON instances.series_id = series.series_id
JOIN sop_classes
ON sop_classes.sop_class_id = instances.sop_class_id
JOIN files
ON files.instance_id = instances.instance_id
LEFT JOIN modalities
ON modalities.modality_id = series.modality_id
LEFT JOIN issuers
ON (patients.issuer_of_patient_identifier = issuers.issuer_id)
SET PATIENT_NAME = 'AAPM'
WHERE PATIENT_IDENTIFIER = 'TG18-2002' ;
Why are you mixing the two different JOIN syntaxes? Simple rule: Never use commas in the FROM clause (and that goes for UPDATE as well). I think you intend:
update vna.patients p
patient_observations po
on p.patient_id = po.patient_id join
studies st
on po.study_id = st.study_id AND
st.patient_id = p.patient_id join
series s
on s.study_id = st.study_id join
instances i
on i.series_id = s.series_id join
sop_classes sc
on sc.sop_class_id = i.sop_class_id join
files f
on f.instance_id = i.instance_id left join
modalities m
on m.modality_id = s.modality_id left join
issuers iss
on (p.issuer_of_patient_identifier = iss.issuer_id)
set p.PATIENT_NAME = 'AAPM'
where p.PATIENT_IDENTIFIER = 'TG18-2002';
That seems way too complicated. I'm guessing you just want:
update vna.patients p
set p.PATIENT_NAME = 'AAPM'
where p.PATIENT_IDENTIFIER = 'TG18-2002';
The error message is very clear, the table patient_observations is listed twice in the table references in your query. Give the second one a different alias if you really need to join it again in the same query:
...
vna.issuers
join patient_observations as po2 on patients. ....
Otherwise, remove one of them.
Also try to use the ANSI SQL join syntax instead of this old syntax.
select Distinct
_Ad.ad_id, _Ad.Ad_Name,
ID.Image_Path, VM.year,
VD.Vehicle_Transformation, VD.Vehicle_Fuel_Type, VD.Vehicle_Mileage
from
_Ad
order by
Ad_Date_Created
inner join
_Image_Details ID on ID.ad_id = _Ad.ad_id
inner join
_Vehicle_Model VM on VM.vehicle_model_id = _AD.vehicle_model_id
inner join
_Vehicle_Details VD on _ad.ad_id = VD.ad_id;
I keep getting an error that multi part data can not be bound. Please help to correct query
Try this:
select Distinct
_Ad.ad_id, _Ad.Ad_Name,
ID.Image_Path, VM.year,
VD.Vehicle_Transformation, VD.Vehicle_Fuel_Type, VD.Vehicle_Mileage
from
_Ad
inner join
_Image_Details ID on ID.ad_id = _Ad.ad_id
inner join
_Vehicle_Model VM on VM.vehicle_model_id = _AD.vehicle_model_id
inner join
_Vehicle_Details VD on _ad.ad_id = VD.ad_id;
order by
Ad_Date_Created
The syntax of your SQL statement is wrong. An ORDER BY clause should come after the JOIN's
I have written the following query, which does not work. I want to know how to make it work. It is a two-JOIN query which fails to work.
SELECT oc_download.download_id, oc_product_to_download.download_id, oc_download_description.download_id
FROM oc_download
LEFT JOIN oc_product_to_download
ON oc_download.download_id = oc_product_to_download.download_id
LEFT JOIN
oc_download.download_id = oc_download_description.download_id
WHERE oc_product_to_download.product_id = 89
With single JOIN it works, but adding the second JOIN it fails. here is the clean working one-JOIN query:
SELECT oc_download.download_id, oc_product_to_download.download_id, oc_download_description.download_id
FROM oc_download
LEFT JOIN oc_product_to_download
ON oc_download.download_id = oc_product_to_download.download_id
WHERE oc_product_to_download.product_id = 89
How should I use multiple JOIN in one single query?
You forgot the table name in the 2nd join
SELECT d.download_id, p.download_id, dd.download_id
FROM oc_download d
LEFT JOIN oc_product_to_download p ON d.download_id = p.download_id
LEFT JOIN oc_download_description dd ON d.download_id = dd.download_id
WHERE p.product_id = 89
And your where clause turns your left join into an inner join. If you don't want that then change your query to
SELECT d.download_id, p.download_id, dd.download_id
FROM oc_download d
LEFT JOIN oc_product_to_download p ON d.download_id = p.download_id
AND p.product_id = 89
LEFT JOIN oc_download_description dd ON d.download_id = dd.download_id
This is your query fixed up a bit, using table aliases and proper join syntax:
SELECT od.download_id, opd.download_id, odd.download_id
FROM oc_download od LEFT JOIN
oc_product_to_download opd
ON od.download_id = opd.download_id LEFT JOIN
oc_download_description odd
od.download_id = odd.download_id
WHERE opd.product_id = 89;
You are using left join, but this appears to be unnecessary. The on clause is undoing the first outer join, turning it into an inner join (unmatched rows would have a NULL value, which are filtered out by the where clause). In fact, I would guess that your data has well defined foreign key relationships among the columns being joined. If this is the case, you should use inner join (or just join) for the query:
SELECT od.download_id, opd.download_id, odd.download_id
FROM oc_download od JOIN
oc_product_to_download opd
ON od.download_id = opd.download_id JOIN
oc_download_description odd
od.download_id = odd.download_id
WHERE opd.product_id = 89;
The left join is misleading because it implies that some keys might not match. You also run the risk of confusing the optimizer.
This is my query
SELECT CONCAT(`SM_Title`,' ',`SM_Full_Name`) AS NAME,
`RG_Date`,
`RG_Reg_No`,
`RG_Stu_ID`,
`SM_Tell_Mobile`,
`SM_Tel_Residance`,
`RG_Reg_Type`,
Default_Batch,
`RG_Status`,
`RG_Final_Fee`,
`RG_Total_Paid`,
(`RG_Final_Fee`-`RG_Total_Paid`) AS TOTALDUE,
SUM(`SI_Ins_Amount` - `SI_Paid_Amount`) AS AS_AT_APRIAL_END
INNER JOIN
(SELECT `SI_Ins_Amount`,
`SI_Reg_No`
FROM
`student_installments`
GROUP BY MONTHNAME(`SI_Due_Date`)) Z ON
Z.`SI_Reg_No` = `registrations`.`RG_Reg_No`
FROM `registrations`
LEFT JOIN `student_master` ON `student_master`.`SM_ID` = `registrations`.`RG_Stu_ID`
LEFT JOIN `student_installments` ON `student_installments`.`SI_Reg_No` = `registrations`.`RG_Reg_No`
WHERE (`RG_Reg_Type` LIKE '%HND%' OR `RG_Reg_Type` LIKE '%LMU%' )
AND `SI_Due_Date` <= '2014-04-30' GROUP BY `SI_Reg_No`
It gave me an error near
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Z LIMIT 0, 25' at line 1
SELECT
CONCAT(SM_Title,' ',SM_Full_Name) AS NAME,
RG_Date,
RG_Reg_No,
RG_Stu_ID,
SM_Tell_Mobile,
SM_Tel_Residance,
RG_Reg_Type,
Default_Batch,
RG_Status,
RG_Final_Fee,
RG_Total_Paid,
(RG_Final_Fee-RG_Total_Paid) AS TOTALDUE,
SUM(SI_Ins_Amount - SI_Paid_Amount) AS AS_AT_APRIAL_END
FROM registrations
INNER JOIN
(SELECT SI_Ins_Amount,SI_Reg_No
FROM student_installments
GROUP BY MONTHNAME(SI_Due_Date)) Z ON Z.SI_Reg_No = registrations.RG_Reg_No
LEFT JOIN student_master ON student_master.SM_ID = registrations.RG_Stu_ID
LEFT JOIN student_installments ON student_installments.SI_Reg_No = registrations.RG_Reg_No
WHERE (RG_Reg_Type LIKE '%HND%' OR RG_Reg_Type LIKE '%LMU%' )
AND SI_Due_Date <= '2014-04-30'
GROUP BY SI_Reg_No
I notice you have fogotten the left table or subselect that you want to join to the (SELECT SI_INs .....) and previous this I could see there is no from clause before join.
I hope this helps you
Regards
You are using from clause in wrong position it should be just after selection of your columns, you can use below query:
SELECT
CONCAT(SM_Title,' ',SM_Full_Name) AS NAME ,RG_Date,RG_Reg_No,RG_Stu_ID,SM_Tell_Mobile,SM_Tel_Residance,RG_Reg_Type,Default_Batch,RG_Status,RG_Final_Fee,RG_Total_Paid,(RG_Final_Fee-RG_Total_Paid) AS TOTALDUE, SUM(SI_Ins_Amount - SI_Paid_Amount) AS AS_AT_APRIAL_END
FROM registrations AS reg
JOIN
(SELECT
SI_Ins_Amount,SI_Reg_No
FROM student_installments
GROUP BY MONTHNAME(SI_Due_Date)) AS Z
ON Z.SI_Reg_No = reg.RG_Reg_No
LEFT JOIN student_master AS sm
ON sm.SM_ID = reg.RG_Stu_ID
LEFT JOIN student_installments AS si
ON si.SI_Reg_No = reg.RG_Reg_No
WHERE (RG_Reg_Type LIKE '%HND%' OR RG_Reg_Type LIKE '%LMU%' ) AND SI_Due_Date <= '2014-04-30'
GROUP BY SI_Reg_No;
In the part below, from keyword should go before the inner join:
FROM registrations
INNER JOIN
(SELECT SI_Ins_Amount,
SI_Reg_No
FROM student_installments
GROUP BY MONTHNAME(SI_Due_Date)
) Z
ON Z.SI_Reg_No = registrations.RG_Reg_No