在sql查询中需要帮助以从字符串值获取子字符串

i have string value as "ORA_Sampl_34_20120530_123456.txt" from this string i want to get output as "34" using sql query.

我有字符串值为“ORA_Sampl_34_20120530_123456.txt”从这个字符串我希望使用SQL查询输出为“34”。

1 个解决方案

#1

This solution should be good for learning:

这个解决方案应该有助于学习:

DECLARE @text NVARCHAR(50) = 'ORA_Sampl_34_20120530_123456.txt',
        @start INT,
        @end INT

SELECT @start = CHARINDEX('_', @text, CHARINDEX('_',@text,1)+1)+1
SELECT @end = CHARINDEX('_',@text, @start)

SELECT SUBSTRING(@text, @start, @end - @start)