“SQL PADD пусть с нулями” Ответ

SQL PADD пусть с нулями

If you want nulls to show as '000' 
It might be an integer -- then you would want

SELECT RIGHT('000'+CAST(field AS VARCHAR(3)),3)

As required by the question this answer only works 
if the length <= 3, if you want something larger you need 
to change the string constant and the two integer constants t
o the width needed. eg '0000' and VARCHAR(4)),4