How to extend the query to add 0 in the cell when no activity is performed

Question

I have the following query, it is working fine to show the cricket time played per day. All I need is to show 0 when no cricket is played. At the moment it is skipping those

Answer 1

you could try this also :- (this could only for one particular activity)

Set Nocount On;

Declare  @MinDate   Date
        ,@MaxDate   Date

Declare @test Table
(
     activity       Varchar(100)
    ,date           Date
    ,TimePerDay     Decimal(5,2)
)

Declare @result Table
(
     activity       Varchar(100)
    ,date           Date
    ,TimePerDay     Decimal(5,2) Default 0
)

;WITH CTE AS 
(
    SELECT   email
            ,last_update
            ,activity
            ,starttime
            ,endtime
            ,duration As Totaltime 
    From    users With (Nolock)
    WHERE   activity ='cricket' 
            And email = 'abc'
    GROUP BY email
            ,activity
            ,duration
            ,starttime
            ,endtime
            ,last_update
)

Insert Into @test(activity,date,TimePerDay)
Select   activity
        ,Cast(starttime as date) As date
        ,SUM(datediff(second, starttime, endtime))/60.0 As TimePerDay
From    cte With (Nolock)
where   starttime >= dateadd(day, -15, last_update)
group by activity
        ,cast(starttime as date)

Select   @MinDate = Min(Date)
        ,@MaxDate = Max(Date)
From    @test

;With AllDates As
(
    Select   @MinDate As xDate
    From    @test As t1
    Where   t1.date = @MinDate

    Union All

    Select  Dateadd(Day, 1, xDate)
    From    AllDates As ad
    Where   ad.xDate < @MaxDate
)

One way is :- (left join)

Select  'cricket' As activity
        ,ad.xDate
        ,Isnull(t.TimePerDay,0) As TimePerDay
From    AllDates As ad With (Nolock)
        Left Join @test As t On ad.xDate = t.date

another way is :- (insert with all dates and update)

    Insert Into @result(activity,date)
Select  'cricket'
        ,ad.xDate
From    AllDates As ad With (Nolock)

Update  t
Set     t.TimePerDay = t1.TimePerDay
From    @result As t
        Join @test As t1 On t.date = t1.date

Select  *
From    @result As r

output

Update

Declare  @MinDate   Date
        ,@MaxDate   Date

Select   @MaxDate = Getdate()
        ,@MinDate = Dateadd(Day, -14, @MaxDate)

;With AllDates As
(
    Select   @MinDate As xDate

    Union All

    Select  Dateadd(Day, 1, xDate)
    From    AllDates As ad
    Where   ad.xDate < @MaxDate
)

Select   @activity As activity                      ---- @activity (your stored procedure parameter)
        ,ad.xDate
        ,Isnull(t.TimePerDay,0) As TimePerDay
From    AllDates As ad With (Nolock)
        Left Join @test As t On ad.xDate = t.date