sql - show empty records with date that don't have data -

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i have sql table, show employees attendances date,time,employee id , key( in or out), as: 

id      atttime     key     attdate 123     08:00    in      2015-08-21 123     06:00 pm    out     2015-08-21 123     08:00    in      2015-08-22 123     06:00 pm    out     2015-08-22 123     08:00    in      2015-08-23 123     06:00 pm    out     2015-08-23 123     08:00    in      2015-08-24 123     06:00 pm    out     2015-08-24 123     08:00    in      2015-08-25 123     06:00 pm    out     2015-08-25 123     08:00    in      2015-08-26 123     06:00 pm    out     2015-08-26 123     08:00    in      2015-08-27 123     06:00 pm    out     2015-08-27

now want show dates requested if don't have data.. example: if user request report 01-08-2015 30-08-2015
want output below: 

id      atttime     key     attdate  null    null        null    2015-08-01 null    null        null    2015-08-01 null    null        null    2015-08-02 null    null        null    2015-08-02 null    null        null    2015-08-03 null    null        null    2015-08-03 null    null        null    2015-08-04 null    null        null    2015-08-04 . . . . . 123     08:00    in      2015-08-21 123     06:00 pm    out     2015-08-21 123     08:00    in      2015-08-22 123     06:00 pm    out     2015-08-22 123     08:00    in      2015-08-23 123     06:00 pm    out     2015-08-23 123     08:00    in      2015-08-24 123     06:00 pm    out     2015-08-24 123     08:00    in      2015-08-25 123     06:00 pm    out     2015-08-25 123     08:00    in      2015-08-26 123     06:00 pm    out     2015-08-26 123     08:00    in      2015-08-27 123     06:00 pm    out     2015-08-27 null    null        null    2015-08-28 null    null        null    2015-08-28 null    null        null    2015-08-29 null    null        null    2015-08-29 null    null        null    2015-08-30 null    null        null    2015-08-30

how make it?

here's solution creates date-range table , right join missing days:

declare @startdate  date = '2015-08-01',         @enddate    date = '2015-08-30'  ;with date (date) (     select  @startdate union     select  dateadd(day, 1, date)        date       date < @enddate ), keys (     select  'in'    [key]     union     select  'out'   [key] ), inoutdates (     select      date, [key]            date     cross join  keys ) select      e.id, e.atttime, e.[key], d.date attdate        employeetable   e right join  inoutdates      d   on  d.date = e.attdate                                 , e.[key] = d.[key] option      (maxrecursion 0)

if want select in/out values key of missing date, can use:

... select      e.id, e.atttime, d.[key], d.date attdate  ...

here's sqlfiddle demo.


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