Can someone please help me understand the case function? - sql-server

Question

I am working in SQL data base. I have to make two columns. The first column is the length of the employee name(I have that) The second column is title of courtesy and then the last name of employee.
My problem is how do i add the case function to have Ms displayed as miss, mr. as mister and dr as doctor. I do not understand. Any help would be appreciated. Here is the code i have so far:
SELECT 'Your full name is ' + CAST(LEN(FirstName) + LEN(LastName) AS VARCHAR(12)) + ' character(s).' AS [Length of Employee Name]
, TitleOfCourtesy + LastName AS Title
FROM dbo.Employees

Answer 1

You can do something like this:
select
... your previous things here ...
case TitleOfCourtesy
when 'Mr' then 'Mister '
when 'Ms' then 'Miss '
when 'Dr' then 'Doctor '
else '' end + LastName as Title

Answer 2

try this
SELECT 'Your full name is ' + CAST(LEN(FirstName) + LEN(LastName) AS VARCHAR(12)) + ' character(s).' AS [Length of Employee Name],
CASE
WHEN TitleOfCourtesy = 'Ms' THEN 'Miss '
WHEN TitleOfCourtesy = 'Mr' THEN 'Mister '
WHEN TitleOfCourtesy = 'dr' THEN 'Doctor ' END + LastName AS Title
FROM dbo.Employees

Answer 3

Thanks all I fixed it I had to add the period after like mr.
SELECT 'Your full name is ' + CAST(LEN(FirstName) + LEN(LastName) AS VARCHAR(12)) + ' character(s).' AS [Length of Employee Name]
, CASE TitleOfCourtesy
WHEN 'Mr.' THEN 'Mister '
WHEN 'mrs. ' THEN 'Miss'
WHEN 'Ms.' THEN 'Miss '
WHEN 'Dr.' THEN 'Doctor '
ELSE '' END
+ TitleOfCourtesy + LastName
AS title
FROM dbo.Employees