计算SQL字符串值中字符出现次数？

Question

如果您有电子邮件地址

you.late.you@asdf.com

you_late_you@asdf.com

如果使用sql代码有2个点/下划线,你如何计算？

Answer 1

select len('you.late.you@asdf.com') - len(replace('you.late.you@asdf.com', '.', ''))