No column name was specified for column 4 of 'a' - sql

Question

select a.*, b.remark from
(
SELECT
[TypeSize] ,
[ShapeCode] ,
CASE
WHEN c.dima <> 0 THEN
'A=' + CONVERT(varchar, cast(c.dima AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN c.dimb <> 0 THEN
', B=' + CONVERT(varchar, cast(c.dimb AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN c.dimc <> 0 THEN
', C=' + CONVERT(varchar, cast(c.dimc AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN c.dimd <> 0 THEN
', D=' + CONVERT(varchar, cast(c.dimd AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN c.dime <> 0 THEN
', E=' + CONVERT(varchar, cast(c.dime AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN c.dimf <> 0 THEN
', F=' + CONVERT(varchar, cast(c.dimf AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN c.dimg <> 0 THEN
', G=' + CONVERT(varchar, cast(c.dimg AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN c.dimn <> 0 THEN
', N=' + CONVERT(varchar, cast(c.dimn AS decimal(18, 0)))
ELSE ''
END
AS dimension,
min(c.CreatedDtTm)
FROM bar_schedule_detail c
WHERE active = 1
AND barid = #BarId
GROUP BY
[TypeSize] ,
[ShapeCode] ,
CASE
WHEN dima <> 0 THEN
'A=' + CONVERT(varchar, cast(dima AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN dimb <> 0 THEN
', B=' + CONVERT(varchar, cast(dimb AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN dimc <> 0 THEN
', C=' + CONVERT(varchar, cast(dimc AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN dimd <> 0 THEN
', D=' + CONVERT(varchar, cast(dimd AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN dime <> 0 THEN
', E=' + CONVERT(varchar, cast(dime AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN dimf <> 0 THEN
', F=' + CONVERT(varchar, cast(dimf AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN dimg <> 0 THEN
', G=' + CONVERT(varchar, cast(dimg AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN dimn <> 0 THEN
', N=' + CONVERT(varchar, cast(dimn AS decimal(18, 0)))
ELSE ''
END
) as a, bar_schedule_detail b
where a.typesize = b.typesize
and a.shapecode = b.shapecode
and
(
CASE
WHEN b.dima <> 0 THEN
'A=' + CONVERT(varchar, cast(b.dima AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN b.dimb <> 0 THEN
', B=' + CONVERT(varchar, cast(b.dimb AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN b.dimc <> 0 THEN
', C=' + CONVERT(varchar, cast(b.dimc AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN b.dimd <> 0 THEN
', D=' + CONVERT(varchar, cast(b.dimd AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN b.dime <> 0 THEN
', E=' + CONVERT(varchar, cast(b.dime AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN b.dimf <> 0 THEN
', F=' + CONVERT(varchar, cast(b.dimf AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN b.dimg <> 0 THEN
', G=' + CONVERT(varchar, cast(b.dimg AS decimal(18, 0)))
ELSE ''
END +
CASE
WHEN b.dimn <> 0 THEN
', N=' + CONVERT(varchar, cast(b.dimn AS decimal(18, 0)))
ELSE ''
END
) = a.dimension
and a.CreatedDtTm = b.CreatedDtTm
and b.active = 1
and b.barid = #BarId
When I execute this code, I get this error :
No column name was specified for column 4 of 'a'.
Does anyone know what the problem? This section is where I encounter the error :
as a, bar_schedule_detail b
where a.typesize = b.typesize
and a.shapecode = b.shapecode

Answer 1

Give alias name for all your sub query columns :
SELECT .....,
.....,
....., MIN(c.CreatedDtTm) AS CreatedDT
In your sub query SELECT clause give alias name for min(c.CreatedDtTm) column