'hello world'  ---->   'Hello world'

update tableName set columnName=CHAR(ASCII(SUBSTRING(columnName, 1, 1))-32)+SUBSTRING(columnName, 2, len(columnName))

WHERE (ASCII(SUBSTRING(columnName, 1, 1)) >96) AND (ASCII(SUBSTRING(columnName, 1, 1)) < 123)

 

update tableName set columnName= STUFF( columnName,1,1,UPPER(SUBSTRING(columnName,1,1)))