SQL Server 2008 Specified column was specified multiple times - sql

Question

The below code throws the following exception. How can I fix this?
Msg 8156, Level 16, State 1, Line 17
The column 'id' was specified multiple times for 'QISproduct'.
Query:
SELECT
g.artcode
, sum(g.aantal)
, i.class_01
, i.Isstockitem
FROM
gbkmut AS g
INNER JOIN
items AS i ON i.itemcode = g.artcode
INNER JOIN
(SELECT
QISP.id
, QISprocess.nml
, QISeventlog.id
, QISeventlog.dtsample
, QISproduct.nms
, QISbatchlog.nm
, QIStestlog.idvariable
, QIStestlog.no
, QISshortnote.ds
, gewicht = CASE QIStestlog.IDvariable
WHEN '139'
THEN QIStestlog.no
END
, aantal = CASE QIStestlog.IDvariable
WHEN '234'
THEN QIStestlog.no
END
, siloleeg = CASE QIStestlog.idvariable
WHEN '23'
THEN CASE QIStestlog.no
WHEN '10'
THEN 'Ja'
ELSE 'Nee'
END
END
, QISvariable.nml
, gl.nm
, QISprocess.id
FROM
QIC.Vobra_new2.dbo.production AS QISP
INNER JOIN
QIC.Vobra_new2.dbo.process AS QISprocess ON QISP.idprocess = QISProcess.id
INNER JOIN
QIC.Vobra_new2.dbo.product AS QISproduct ON QISP.idproduct = QISproduct.id
INNER JOIN
QIC.Vobra_new2.dbo.batchlog AS QISbatchlog ON QISP.idbatch = QISbatchlog.id
INNER JOIN
QIC.Vobra_new2.dbo.eventlog AS QISeventlog ON QISeventlog.idproduction = QISP.id
AND QISeventlog.idbatch = QISbatchlog.id
INNER JOIN
QIC.Vobra_new2.dbo.testlog AS QIStestlog ON QIStestlog.idevent = QISeventlog.id
LEFT OUTER JOIN
QIC.Vobra_new2.dbo.shortnote AS QISshortnote ON QISshortnote.id = QIStestlog.no
AND QIStestlog.idvariable = '144'
INNER JOIN
QIC.Vobra_new2.dbo.variable AS QISvariable ON QISvariable.id = QIStestlog.idvariable
LEFT OUTER JOIN
QIC.Vobra_new2.dbo.vvarxproc AS vvp ON vvp.idvariable = QISvariable.id
AND vvp.idprocess = QISP.idprocess
LEFT OUTER JOIN
QIC.Vobra_new2.dbo.attribute AS QISattribute ON QISattribute.id = vvp.idattribute
LEFT OUTER JOIN
QIC.Vobra_new2.dbo.grade AS QISgrade ON QISgrade.id = QISattribute.idgrade
LEFT OUTER JOIN
QIC.Vobra_new2.dbo.gradelevel AS gl ON gl.idgrade = QISattribute.idgrade
AND gl.nlevel = QIStestlog.no
WHERE
QISbatchlog.nm NOT LIKE 'V%'
AND QISP.dtstart > '2017-01-01'
AND QISP.dtstart < '2017-01-19'
AND QISP.idprocess IN ('12', '13', '14', '15', '16', '17', '18', '41')
AND QIStestlog.idvariable IN ('234', '139', '128')
) QISproduct ON g.artcode = QISproduct.nms
WHERE
g.bkjrcode > '2015'
AND g.reknr IN (3000, 3010, 3020)
AND g.aantal > 0
AND g.warehouse IN ('1', '9')
AND g.datum >= '2017-01-01'
AND g.oorsprong = 'R'
AND g.kstplcode <> 'VPR'
GROUP BY
g.artcode, i.Class_01, i.IsStockItem

Answer 1

The computed query aliased to QISProduct contains id column from two tables i.e. QISEventLog and QISProcess. So rename those columns to different names. Updated query
SELECT g.artcode
,sum(g.aantal)
,i.class_01
,i.Isstockitem
FROM gbkmut AS g
INNER JOIN items AS i ON i.itemcode = g.artcode
INNER JOIN (
SELECT QISP.id
,QISprocess.nml AS Processnml
,QISeventlog.id AS EventLogId
,QISeventlog.dtsample
,QISproduct.nms
,QISbatchlog.nm AS batchnm
,QIStestlog.idvariable
,QIStestlog.no
,QISshortnote.ds
,gewicht = CASE QIStestlog.IDvariable
WHEN '139'
THEN QIStestlog.no
END
,aantal = CASE QIStestlog.IDvariable
WHEN '234'
THEN QIStestlog.no
END
,siloleeg = CASE QIStestlog.idvariable
WHEN '23'
THEN CASE QIStestlog.no
WHEN '10'
THEN 'Ja'
ELSE 'Nee'
END
END
,QISvariable.nml variablenml
,gl.nm AS glnm
,QISprocess.id AS ProcessId
FROM QIC.Vobra_new2.dbo.production AS QISP
INNER JOIN QIC.Vobra_new2.dbo.process AS QISprocess ON QISP.idprocess = QISProcess.id
INNER JOIN QIC.Vobra_new2.dbo.product AS QISproduct ON QISP.idproduct = QISproduct.id
INNER JOIN QIC.Vobra_new2.dbo.batchlog AS QISbatchlog ON QISP.idbatch = QISbatchlog.id
INNER JOIN QIC.Vobra_new2.dbo.eventlog AS QISeventlog ON QISeventlog.idproduction = QISP.id
AND QISeventlog.idbatch = QISbatchlog.id
INNER JOIN QIC.Vobra_new2.dbo.testlog AS QIStestlog ON QIStestlog.idevent = QISeventlog.id
LEFT JOIN QIC.Vobra_new2.dbo.shortnote AS QISshortnote ON QISshortnote.id = QIStestlog.no
AND QIStestlog.idvariable = '144'
INNER JOIN QIC.Vobra_new2.dbo.variable AS QISvariable ON QISvariable.id = QIStestlog.idvariable
LEFT JOIN QIC.Vobra_new2.dbo.vvarxproc AS vvp ON vvp.idvariable = QISvariable.id
AND vvp.idprocess = QISP.idprocess
LEFT JOIN QIC.Vobra_new2.dbo.attribute AS QISattribute ON QISattribute.id = vvp.idattribute
LEFT JOIN QIC.Vobra_new2.dbo.grade AS QISgrade ON QISgrade.id = QISattribute.idgrade
LEFT JOIN QIC.Vobra_new2.dbo.gradelevel AS gl ON gl.idgrade = QISattribute.idgrade
AND gl.nlevel = QIStestlog.no
WHERE QISbatchlog.nm NOT LIKE 'V%'
AND QISP.dtstart > '2017-01-01'
AND QISP.dtstart < '2017-01-19'
AND QISP.idprocess IN (
'12'
,'13'
,'14'
,'15'
,'16'
,'17'
,'18'
,'41'
)
AND QIStestlog.idvariable IN (
'234'
,'139'
,'128'
)
) QISproduct ON g.artcode = QISproduct.nms
WHERE g.bkjrcode > '2015'
AND g.reknr IN (
3000
,3010
,3020
)
AND g.aantal > 0
AND g.warehouse IN (
'1'
,'9'
)
AND g.datum >= '2017-01-01'
AND g.oorsprong = 'R'
AND g.kstplcode <> 'VPR'
GROUP BY g.artcode
,i.Class_01
,i.IsStockItem

Answer 2

, QISbatchlog.nm
And
, gl.nm
Have same column name
You can add as to change colum name
, gl.nm as col1

Answer 3

You have multiple issues in your query. You are populating following columns with same column name in your inner query. Use Unique name using AS alias in inner query.
QISP.id
QISeventlog.id
QISprocess.id
gl.nm
QISbatchlog.nm
QISprocess.nml
QISvariable.nml
It is mandatory to have unique column name return by select list in sql.