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I have sql query in which i want return rows with distinct value order by particular column. like say,i want disntict batchno from ordertable order by locationid.

i have tried google also but not able to find out solution 

ORDER BY items must appear in the select list if SELECT DISTINCT is specified.

that what i got every time i tried.

when not using distinct i got output but with duplicate rows using this query

Select Batchno,LocationId from Ordertbl order by case when[LocationId] =3 THEN 0 ELSE 1 END, [LocationId]

if i use distinct it gives me error these are query i tried out.

Select distinct CAST(Batchno as Varchar(MAX)),LocationId from Ordertbl order by case when[LocationId] =3 THEN 0 ELSE 1 END,[LocationId]

or 

Select distinct CAST(Batchno as Varchar(MAX)),LocationId from Ordertbl order by case when[LocationId] =3 THEN 0 ELSE 1 END,[LocationId],[Batchno]

so this is things i tried but no luck.please help me.

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1 回答 1

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DISTINCT不允许任何ORDER BY不在SELECT列表中的表达式（即使在这种情况下，表达式只能为每个不同的行产生一个特定值）。您可以使用。

SELECT Batchno,
       LocationId
FROM   Ordertbl
GROUP  BY Batchno,
          LocationId
ORDER  BY CASE
            WHEN[LocationId] = 3 THEN 0
            ELSE 1
          END,
          [LocationId]
于 2012-10-09T07:21:10.487 回答