Question : CAST(MONTH(DDate) AS VarChar(20))  need two digits not one.

I am using the following SQL to return the month number.

CAST(MONTH(DDate) AS VarChar(20))  as MonthNumber

The results are a single digit. For example, 2 instead of 02.

How can I put in a leading zero where needed and miss it out on months which are already two digits long?

Answer : CAST(MONTH(DDate) AS VarChar(20))  need two digits not one.

try
select
Case When Len(CAST(MONTH(DDate) AS VarChar(20))) = 1
then '0' + CAST(MONTH(DDate) AS VarChar(20))
Else  CAST(MONTH(DDate) AS VarChar(20)) End
as MonthNumber