CASE WHEN THEN ELSE change to union?

Question

I was wondering if it is possible to change a CASE when then else to a union all, or something like this.

I hope that it is possible ...

example

CASE WHEN(C.Salutation = 'Dhr.' OR C.salutation = 'dhr.')
         THEN 'Meneer'+' '+ISNULL(C.middlename+' ','')+C.Lastname
    WHEN(C.Salutation = 'Mw.' OR C.salutation = 'mw.')
         THEN 'Mevrouw'+' '+ISNULL(C.middlename+' ','')+C.Lastname
    ELSE 'Meneer/Mevrouw '+ISNULL(C.middlename+' ','')+ISNULL(C.Lastname,'') END AS 'K5'

i hope you guys can help me out..

Answer 1

Well, yes you can, but it is ugly:

SELECT 'Meneer'+' '+ISNULL(C1.middlename+' ','')+C1.Lastname AS 'K5'
FROM table C1
WHERE C1.Salutation = 'Dhr.' OR C1.salutation = 'dhr.'
UNION
SELECT 'Mevrouw'+' '+ISNULL(C2.middlename+' ','')+C2.Lastname
FROM table C2
WHERE C2.Salutation = 'Mw.' OR C2.salutation = 'mw.'
UNION
SELECT 'Meneer/Mevrouw '+ISNULL(C.middlename+' ','')+ISNULL(C.Lastname,'')
FROM table C3
WHERE C3.Salutation != 'Mw.' AND C3.salutation != 'mw.'
AND C3.Salutation != 'Dhr.' AND C3.salutation != 'dhr.'