将SQL中字符串的特定字母大写

Question

How would I capitalise every letter 'a' in for example 'angela'

SELECT LOWER(SUBSTRING('angela',1,CHARINDEX('a', 'angela')-1))+UPPER(RIGHT(LEFT('angela',CHARINDEX('a', 'angela')),1))+LOWER(SUBSTRING('angela',CHARINDEX('a', 'angela')+1,LEN('angela'))) 

This works but only on one letter.

Answer 1

Most RDBMS support replace() . In Excel it's called substitute() . Gotta love consistency

SELECT Replace('angela','a','A')
Gives us: AngelA

SELECT Replace('the sky was the darkest blue','the','')
Gives us:' sky was  darkest blue'

SELECT Replace('the sky was the darkest blue','the ','')
Gives us:'sky was darkest blue'

Demo

Replace(<StringToEvaluate>, <test to search for>, <text to overwrite with>)