计算列中所有出现的文本

Question

我想计算varchar(200)列中特定单词的所有出现次数.

我的数据是这样的:

ID    MyText
---   --------------------------------------
1     Hello how are you doing? Hello again.
2     This is great.
3     Hello my special person.

所以我希望SQL做'%Hello%'并返回数字3.我现在不关心的是例如包含部分单词并且现在不关心使用通配符.我只需要一些简单的测试来验证一些东西.

Answer 1

WITH T(ID,MyText) AS
(
SELECT 1, 'Hello how are you doing? Hello again.' UNION ALL
SELECT 2, 'This is great.' UNION ALL
SELECT 3, 'Hello my special person.'
)
SELECT *, 
       (LEN(MyText) - LEN(REPLACE(MyText, 'Hello', ''))) / LEN('Hello') AS Num
FROM T

要么

SELECT  SUM((LEN(MyText) - LEN(REPLACE(MyText, 'Hello', ''))) / LEN('Hello'))
FROM T

对于汇总结果