Question

SQL中是否有一种方法可以忽略转换失败的记录。设置一些默认值也可以。

> SELECT convert(datetime, foo_str)
> FROM foo_tbl

 ------------------------
 Aug 23 2013 00:00:00.000
 Aug 17 2013 00:00:00.000
 May 06 2015 00:00:00.000
 Aug 13 2013 00:00:00.000
 Aug 09 2013 00:00:00.000
 Sep 05 2007 00:00:00.000
 May 06 2015 00:00:00.000
 May 06 2015 00:00:00.000
 Feb 24 2009 00:00:00.000
 May 06 2015 00:00:00.000
 Mar 29 2013 00:00:00.000
 May 06 2015 00:00:00.000
 Jul 24 2010 00:00:00.000
 May 06 2015 00:00:00.000
 May 06 2015 00:00:00.000
 May 03 2015 00:00:00.000

消息249，级别16，状态1，行1显式期间语法错误转换VARCHAR值＆＃39; 10101＆＃39;到DATETIME字段。

可以避免错误，以便SELECT语句完成吗？

Answer 1

以下代码之类的东西应该适用于sybase

SELECT convert(datetime, foo_str)
FROM foo_tbl
WHERE foo_str like '[A-Z][A-Z][A-Z] [0-1][0-9] [0-2][0-9][0-9][0-9] [0-2][0-9]:[0-5][0-9]:[0-5][0-9].[0-9][0-9][0-9]'

如果00:00:00.000不变，你可以更简单地进行操作

SELECT convert(datetime, foo_str)
FROM foo_tbl
WHERE foo_str like '[A-Z][A-Z][A-Z] [0-1][0-9] [0-2][0-9][0-9][0-9] 00:00:00.000'

或

SELECT convert(datetime, foo_str)
FROM foo_tbl
WHERE foo_str like '[A-Z][A-Z][A-Z] [0-1][0-9] [0-2][0-9][0-9][0-9]%'

尝试转换为datetime

1 个答案: