这是我的查询
select
dtfromdate, dttodate,
(SELECT DATEDIFF(day, dtfromdate, dtTodate)) AS NumberOfDays,
fltspl
from dbo.tblHR_SpecialLeaveTransaction
where
nvrempcode = 'MCL1218' and nvrstatus = 1
order by
dtfromdate
结果：
dtfromdate dttodate NumberOfDays fltspl
----------------------- ----------------------- ------------ ----------------------
2012-05-01 00:00:00 2012-05-31 00:00:00 30 30
另一个查询
select
dtfromdate, dtTodate,
(SELECT DATEDIFF(day, dtfromdate, dtTodate) ) AS NumberOfDays,
fltcl, fltsl, fltpl, fltcompoff, fltod, fltlop,
isnull(fltflexiL, 0) as fltflexiL
from
tblhr_leavetransaction
where
nvrempcode = 'MCL1218' and nvrstatus = 1
order by
dtfromdate
结果：
dtfromdate dtTodate NumberOfDays fltcl fltsl fltpl fltcompoff fltod fltlop fltflexiL
----------------------- ----------------------- ------------ ---------------------- ---------------------- ---------------------- ---------------------- ---------------------- ---------------------- ----------------------
2011-01-14 00:00:00 2011-01-14 00:00:00 0 1 0 0 0 0 0 0
2011-01-17 00:00:00 2011-01-17 00:00:00 0 1 0 0 0 0 0 0
2011-01-25 00:00:00 2011-01-25 00:00:00 0 0 0 0 0 1 0 0
2011-04-01 00:00:00 2011-04-02 00:00:00 1 0 0 0 0 2 0 0
2011-05-14 00:00:00 2011-05-14 00:00:00 0 0 0 0 0 1 0 0
2011-05-16 00:00:00 2011-05-16 00:00:00 0 0 0 0 1 0 0 0
2011-05-18 00:00:00 2011-05-18 00:00:00 0 1 0 0 0 0 0 0
2011-05-19 00:00:00 2011-05-20 00:00:00 1 0 2 0 0 0 0 0
2011-05-21 00:00:00 2011-05-21 00:00:00 0 1 0 0 0 0 0 0
2011-05-23 00:00:00 2011-05-23 00:00:00 0 0 0 0 1 0 0 0
我需要像这样的输出，
dtfromdate dtTodate NumberOfDays fltcl fltsl fltpl fltcompoff fltod fltlop fltflexiL fltspl
----------------------- ----------------------- ------------ ---------------------- ---------------------- ---------------------- ---------------------- ---------------------- ---------------------- ---------------------- ----------
2011-01-14 00:00:00 2011-01-14 00:00:00 0 1 0 0 0 0 0 0 0
2011-01-17 00:00:00 2011-01-17 00:00:00 0 1 0 0 0 0 0 0 0
2011-01-25 00:00:00 2011-01-25 00:00:00 0 0 0 0 0 1 0 0 0
2011-04-01 00:00:00 2011-04-02 00:00:00 1 0 0 0 0 2 0 0 0
2011-05-14 00:00:00 2011-05-14 00:00:00 0 0 0 0 0 1 0 0 0
2011-05-16 00:00:00 2011-05-16 00:00:00 0 0 0 0 1 0 0 0 0
2011-05-18 00:00:00 2011-05-18 00:00:00 0 1 0 0 0 0 0 0 0
2011-05-19 00:00:00 2011-05-20 00:00:00 1 0 2 0 0 0 0 0 0
2011-05-21 00:00:00 2011-05-21 00:00:00 0 1 0 0 0 0 0 0 0
2011-05-23 00:00:00 2011-05-23 00:00:00 0 0 0 0 1 0 0 0 0
2012-05-01 00:00:00 2012-05-31 00:00:00 30 0 0 0 0 0 0 0 30
答案 0 :(得分：1)
看起来您只想要union两个查询。为此，两个查询都必须包含所有列，只需根据需要将这些列设置为null / zero。另一个轻微的困难是你在工会时不能使用order by，除非你再选择整个事情。
没有order by：
select
dtfromdate, dttodate,
(SELECT DATEDIFF(day, dtfromdate, dtTodate)) AS NumberOfDays,
0 as fltcl,
0 as fltsl,
0 as fltpl,
0 as fltcompoff,
0 as fltod,
0 as fltlop,
0 as fltflexiL,
fltspl
from dbo.tblHR_SpecialLeaveTransaction
where
nvrempcode = 'MCL1218' and nvrstatus = 1
union
select
dtfromdate, dtTodate,
(SELECT DATEDIFF(day, dtfromdate, dtTodate) ) AS NumberOfDays,
fltcl, fltsl, fltpl, fltcompoff, fltod, fltlop,
isnull(fltflexiL, 0) as fltflexiL ,
0 as fltspl
from
tblhr_leavetransaction
where
nvrempcode = 'MCL1218' and nvrstatus = 1
如果您需要特定订单：
SELECT * FROM
(
select
dtfromdate, dttodate,
(SELECT DATEDIFF(day, dtfromdate, dtTodate)) AS NumberOfDays,
0 as fltcl,
0 as fltsl,
0 as fltpl,
0 as fltcompoff,
0 as fltod,
0 as fltlop,
0 as fltflexiL,
fltspl
from dbo.tblHR_SpecialLeaveTransaction
where
nvrempcode = 'MCL1218' and nvrstatus = 1
union
select
dtfromdate, dtTodate,
(SELECT DATEDIFF(day, dtfromdate, dtTodate) ) AS NumberOfDays,
fltcl, fltsl, fltpl, fltcompoff, fltod, fltlop,
isnull(fltflexiL, 0) as fltflexiL ,
0 as fltspl
from
tblhr_leavetransaction
where
nvrempcode = 'MCL1218' and nvrstatus = 1
) src
order by dtfromdate