ADO.NET :: How To Join The Two Tables With A Constraint
Nov 23, 2010
I have a scenario, I will pass a StatusID , According to that StatusID , The rows will be fetched from a table[tblEventStatus] and newly fetched row has to fecth the data from another table [tblEvent].
Ex: StatusID - Value I am Passing
Table 1: tblEventStatus - Column:SysID - StatusId - EventID
Table 2: tblEvent - Column:SysID - EventID - EventDesc
I want to use the Linq - I tried like this, But It doesnt work
var query1 = from objtblEventStatus in db.tblEventStatus
where objtblEventStatus.StatusId== StatusId
join objev_events in db.tblEvent on objtblEventStatus.EventID equals
(objev_events == null ? null : objev_events.UID)
select new { Category = objev_events.EventID , Name = objev_events.EventDesc};
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[Code]....
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[Code]....
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Sep 9, 2010
I was trying to find out how I can join more than 2 tables using the LINQ-to-SQL syntax. For instance, joining 2 tables in SQL:
SELECT * FROM Table1 AS T1 INNER JOIN Table2 AS T2 ON T1.Key=T2.Column1WHERE T2.Key='17';
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Sep 10, 2010
TABLE 1
SELECT I.STUNA
,S.SNO
,SUM(B.AMT * Y.YEAR) AS AMT
FROM STUDENT S
LEFT JOIN INFO I ON S.SNO = I.SNO
LEFT JOIN BONUS B ON S.SNO = B.SSNO
LEFT JOIN YEAR Y ON S.SNO = Y.SSNO
STUNA SNO AMT
JOHN A 10
LISA B 20
ALLEN C 100
TABLE 2
SNO AMT
A 1
B 2
C 3
D 5
I WANT TO HAVE RESULT LIKE THIS (TABLE1 + TABLE2)
STUNA SNO AMT
JOHN A 11
LISA B 22
ALLEN C 103
EDDIE D 5
I TRIED USE THIS QEURY
SELECT I.STUNA
,S.SNO
,SUM(B.AMT) AS AMT
FROM STUDENT S
LEFT JOIN INFO I ON S.SNO = I.SNO
LEFT JOIN BONUS B ON S.SNO = B.SSNO
LEFT JOIN
(
SELECT SNO, SUM(AMT) AS AMT
FROM TABLE2
GROUP BY SNO
) T2 ON S.SNO = T2.SNO
GROUP BY I.STUNA,S.SNO
THE RESULT IS
STUNA SNO AMT
JOHN A 11
LISA B 22
ALLEN C 103
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Dec 9, 2010
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[Code]....
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[Code]....
so I got error:
[Code]....
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[Code]....
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[Code]....
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[Code]....
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[Code]....
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[Code]....
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[Code]....
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[Code]....
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[code]....
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