确定列值字符串是否以数字开头

Question

我有一个表Questions以及列Description。它的列值是这样的：

This is First Heading, 
1 This is Subheading one, 
1.2 This is subheading Question 
This is Second heading 
2 This is subheading Two. 
2.1 This is Subheading Question1 

如何确定，对于每一行，如果其列值以数字0-9开头？

是否有任何SQL Server 2008+功能？

Answer 1

SELECT CASE WHEN ISNUMERIC(SUBSTRING(LTRIM(Description), 1, 1)) = 1 
     THEN 'yes' 
     ELSE 'no' 
     END AS StartsWithNumber 
FROM Questions 

• ISNUMERIC
• SUBSTRING

Answer 2

select true where cast(substring('1 This is Subheading', 1, 1) as int) between 0 AND 9 

Answer 3

您可以使用下面的查询。它首先从左侧移除额外的空间并获得左起第一个字符。如果该查询不是数字，则返回0，否则返回1.

Select ISNUMERIC(Left(Ltrim('1 This is Subheading'),1)) As Number 

Answer 4

SELECT * FROM Questions WHERE Description LIKE '[0-9]%'