sql server - SQL query when result is empty -

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i have table this

user     itemnumber     datebought (yyyymmdd)            1            20160101 b           2            20160202 c           3            20160903 d           4            20160101

now have show total number of items bought each user after date 20160202 (2 february 2016)

i used 

select user, count(itemnumber)<br/> table<br/> datebought >= 20160202<br/> group user<br>

it gives me results

b        1 c        1

but want this

a      0 b      1 c      1 d      0

please tell me quick method / efficient method ?

try this,

       declare @table table   (      [user]     varchar(1),      itemnumber int,      datebought date   )  insert @table values ('a',1,'20160101'), ('b',2,'20160202'), ('b',2,'20160202'), ('b',2,'20160202'), ('c',3,'20160903'), ('d',4,'20160101')  select *   @table  select [user],        sum(case              when datebought >= '20160202' 1              else 0            end) itemcount   @table group  [user]

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