Count the totla number of days in current month

Count the days in current month-

Count the total number of days in current month
1.) select day(dateadd(mm,1, getdate())-day(getdate()))
2.)
SELECT (CASE MONTH(GETDATE())
WHEN 1 THEN 31
WHEN 2 THEN (CASE YEAR(GETDATE())%4 WHEN 0 THEN 29 ELSE 28 END)
WHEN 3 THEN 31
WHEN 4 THEN 30
WHEN 5 THEN 31
WHEN 6 THEN 30
WHEN 7 THEN 31
WHEN 8 THEN 31
WHEN 9 THEN 30
WHEN 10 THEN 31
WHEN 11 THEN 30
WHEN 12 THEN 31
END) AS LastDayOfMonth

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