[英]Concatenate two columns values
I am trying to concatenate two date
columns, putting a -
between the values. 我试图连接两个
date
列,在值之间放置一个-
。
Table: 表:
Column A | Column B
------------------------|-------------------------
2010-07-01 00:00:00.000 | NULL
NULL | 2011-01-12 00:00:00.000
2006-04-01 00:00:00.000 | 2010-05-31 00:00:00.000
NULL | NULL
Query: 查询:
select L.ColumnA + ' - ' + L.Column B AS [Dates]
from abc L
It's showing all the fields NULL unless both the columns have some data like 除非所有列都包含一些数据,否则它将显示所有字段为NULL
2006-04-01 00:00:00.000-2010 - 05-31 00:00:00.000
However, the final output I need is: 但是,我需要的最终输出是:
[Dates]
--------------------
07/01/10 -
04/01/06 - 05/31/10
- 01/12/11
<blank (for nulls)>
You need to convert NULL values to empty strings. 您需要将NULL值转换为空字符串。 At the very least:
至少:
SELECT COALESCE(L.ColumnA, '') + '-' + COALESCE(L.ColumnB, '') AS [Dates]
FROM abc L
Then, to format the dates as shown: 然后,按如下所示格式化日期:
SELECT COALESCE(CONVERT(CHAR(8), L.ColumnA, 1), '') + '-'
+ COALESCE(CONVERT(CHAR(8), L.ColumnB, 1), '') AS [Dates]
FROM abc L
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