Question

我目前有一个用于报告历史数据的表格。我有

SELECT ACTIONTYPE,
       BINNUM,
       DSID,
       LOCATIONNAME,
       LOCATIONTYPE,
       ORDNO,
       ORIGREC,
       convert(varchar(10),TIMEOFACTION, 101) + 
             right(convert(varchar(32),TIMEOFACTION,100),8) as TIMEOFACTION,
       TOTALLIFE 
FROM DLOCATIONHISTORY 
ORDER BY TIMEOFACTION DESC

我编辑了TIMEOFACTION列，以便将日期格式字段显示为mm/dd/yyyy hh:mmAM/PM。但是，引用我的查询的程序将PM置于PM之前，因为A位于P之前。解决我的查询以防止这种情况发生的最佳方法是什么？我可以使用不同的排序技术吗？

我当前的报告查询显示：

**TIMEOFACTION**
12/13/2017 7:29AM
12/12/2017 10:07AM
12/12/2017 9:58AM
12/12/2017 1:51PM
12/12/2017 2:02PM
12/11/2017 11:01AM

何时显示：

**TIMEOFACTION**
12/13/2017 7:29AM
12/12/2017 2:02PM
12/12/2017 1:51PM
12/12/2017 10:07AM
12/12/2017 9:58AM
12/11/2017 11:01AM

Answer 1

LOL，只是包含表名或表别名的完整参考列：

SELECT ACTIONTYPE,
       BINNUM,
       DSID,
       LOCATIONNAME,
       LOCATIONTYPE,
       ORDNO,
       ORIGREC,
       convert(varchar(10),TIMEOFACTION, 101) + 
             right(convert(varchar(32),TIMEOFACTION,100),8) as TIMEOFACTION,
       TOTALLIFE 
FROM DLOCATIONHISTORY 
ORDER BY DLOCATIONHISTORY.TIMEOFACTION DESC --<-- here!

Simplified sample

MS SQL Server 2014架构设置：

create table t ( i int, a char(1) );
insert into t values
(1,'a'),
(2,'b'),
(3,'c');

查询1 ：

select -1*i as i, a
from t
order by t.i

<强> Results ：

|  i | a |
|----|---|
| -1 | a |
| -2 | b |
| -3 | c |

查询2 ：

select -1*i as i, a
from t
order by i

<强> Results ：

|  i | a |
|----|---|
| -3 | c |
| -2 | b |
| -1 | a |

Answer 2

您可以将派生表与列别名一起使用，然后重命名回原始列名。例如：

DECLARE @table TABLE(TIMEOFACTION datetime)
INSERT INTO @table VALUES
 ('2017-12-13 07:29:00')
,('2017-12-12 10:07:00')
,('2017-12-12 09:58:00')
,('2017-12-12 13:51:00')
,('2017-12-12 14:02:00')
,('2017-12-11 11:01:00')

SELECT convert(varchar(10),dT.TIMEOFACTION2, 101) 
       + right(convert(varchar(32),TIMEOFACTION2,100),8) as TIMEOFACTION
  FROM (
        SELECT TIMEOFACTION AS TIMEOFACTION2
          FROM @table
       ) AS dT
ORDER BY TIMEOFACTION2 DESC

产地：

TIMEOFACTION
12/13/2017  7:29AM
12/12/2017  2:02PM
12/12/2017  1:51PM
12/12/2017 10:07AM
12/12/2017  9:58AM
12/11/2017 11:01AM

排序格式化的日期

2 个答案: