求解正确的sql语句

SELECT id,convert(varchar(13),date,120),[type],count(*) FROM 

(select * from barcode_2d WHERE date >= '2013-07-08 08:00:00' AND date < '2013-07-09 08:00:00' 

union all 

select * from barcode_2d_n WHERE date >= '2013-07-08 08:00:00' AND date < '2013-07-09 08:00:00' 

union all 

select * from barcode_2d_temp WHERE date >= '2013-07-08 08:00:00' AND date < '2013-07-09 08:00:00' 

union all 

select * from barcode_2d_sep_temp WHERE date >= '2013-07-08 08:00:00' AND date < '2013-07-09 08:00:00' 

union all 

select id,username,packageno,lotno,description,[type],barcode,date from barcode_2d_qr_temp WHERE date >= '2013-07-08 08:00:00' AND date < '2013-07-09 08:00:00' 

union all 

select id,username,packageno,lotno,description,[type],barcode,date from barcode_2d_qr WHERE date >= '2013-07-08 08:00:00' AND date < '2013-07-09 08:00:00' 

union all 

select id,username,packageno,lotno,description,[type],barcode,date from barcode_2d_sep WHERE date >= '2013-07-08 08:00:00' AND date < '2013-07-09 08:00:00')a 

GROUP BY convert(varchar(13),date,120) ORDER BY convert(varchar(13),date,120) ASC

结果报错：Column 'a.ID' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.

求正确结果及原因，谢谢！
------解决方案--------------------
SELECT?id,convert(varchar(13),date,120),[type],count(*)?FROM?
(select?*?from?barcode_2d?WHERE?date?>=?'2013-07-08?08:00:00'?AND?date?<?'2013-07-09?08:00:00'?
union?all?
select?*?from?barcode_2d_n?WHERE?date?>=?'2013-07-08?08:00:00'?AND?date?<?'2013-07-09?08:00:00'?
union?all?
select?*?from?barcode_2d_temp?WHERE?date?>=?'2013-07-08?08:00:00'?AND?date?<?'2013-07-09?08:00:00'?
union?all?
select?*?from?barcode_2d_sep_temp?WHERE?date?>=?'2013-07-08?08:00:00'?AND?date?<?'2013-07-09?08:00:00'?
union?all?
select?id,username,packageno,lotno,description,[type],barcode,date?from?barcode_2d_qr_temp?WHERE?date?>=?'2013-07-08?08:00:00'?AND?date?<?'2013-07-09?08:00:00'?
union?all?
select?id,username,packageno,lotno,description,[type],barcode,date?from?barcode_2d_qr?WHERE?date?>=?'2013-07-08?08:00:00'?AND?date?<?'2013-07-09?08:00:00