SELECT name,bdate,mm,
CASE
WHEN MM = '01' THEN 'Jan.'
WHEN MM = '02' THEN 'Feb.'
WHEN MM = '03' THEN 'Mar.'
WHEN MM = '04' THEN 'Apr.'
WHEN MM = '05' THEN 'May.'
WHEN MM = '06' THEN 'Jun.'
WHEN MM = '07' THEN 'Jul.'
WHEN MM = '08' THEN 'Aug.'
WHEN MM = '09' THEN 'Sep.'
WHEN MM = '10' THEN 'Oct.'
WHEN MM = '11' THEN 'Nov.'
WHEN MM = '12' THEN 'Dec.'
END Month
fROM BirthdayView;
