sql-server - 确定列值字符串是否以数字开头

Question

我有一个Questions带有列的表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

对于每一行，我如何确定其列值是否以数字 0-9 开头？

Answer 1

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

• 数字
• 子串

Answer 2

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

Answer 3

您可以使用以下查询。首先从左侧删除多余的空间并获得第一个左侧字符。如果不是数字，则此查询返回 0，否则返回 1。

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

Answer 4

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

Answer 5

select * from TABLE_NAME where (YourColName like '0%' or YourColName like '1%' or YourColName like '2%' or YourColName like '3%' or YourColName like '4%' or YourColName like '5%' or YourColName like '6%' 或 YourColName like '7%' 或 YourColName like '8%' 或 YourColName like '9%')