SQL Server How to combine 3 queries into one? - sql

Question

I want to condense the following three queries into one query and out put the totals into 3 columns. Oh and how do I make it so I don't have to declare the date. I want it to "know" the current date, month, and year.
DECLARE #myDate as datetime
SET #myDate = '2015-01-1'
select SUM(Amount) as 'Day Total'
from [Accounting].[dbo].[HandPay]
where AccountingDate>=#myDate and AccountingDate<dateadd(day,1,#myDate)
select SUM(Amount) as 'Month Total'
from [Accounting].[dbo].[HandPay]
where AccountingDate>=#myDate and AccountingDate<dateadd(MONTH,1,#myDate)
select SUM(Amount) as 'Day Total'
from [Accounting].[dbo].[HandPay]
where AccountingDate>=#myDate and AccountingDate<dateadd(year,1,#myDate)
What is the best way to do this?
Thanks!
Thanks for all the super fast responses! This is now solved.

Answer 1

If I'm understanding the problem correctly, then something like this ought to work:
declare #today date = convert(date, getdate());
select
[Day Total] = sum(case when [AccountingDate] >= #today and [AccountingDate] < dateadd(day, 1, #today) then [Amount] else 0 end),
[Month Total] = sum(case when [AccountingDate] >= #today and [AccountingDate] < dateadd(month, 1, #today) then [Amount] else 0 end),
[Year Total] = sum(case when [AccountingDate] >= #today and [AccountingDate] < dateadd(year, 1, #today) then [Amount] else 0 end)
from
[Accounting].[dbo].[HandPay];
Note that [Month Total] and [Year Total] don't give the sums of the entries that occur within the current month/year, but rather the sum of the entries that occur within a month/a year of today's date. I'm not sure if that's what you want, but it seems consistent with the original queries.
UPDATE: As suggested by D Stanley below, you can simplify this a bit since you know that the date ranges that compose the [Day Total] and [Month Total] sums are enclosed entirely within the date range that composes the [Year Total] sum. Here's what this might look like:
declare #today date = convert(date, getdate());
select
[Day Total] = sum(case when [AccountingDate] < dateadd(day, 1, #today) then [Amount] else 0 end),
[Month Total] = sum(case when [AccountingDate] < dateadd(month, 1, #today) then [Amount] else 0 end),
[Year Total] = sum([Amount])
from
[Accounting].[dbo].[HandPay]
where
[AccountingDate] >= #today and [AccountingDate] < dateadd(year, 1, #today);

Answer 2

Make them all part of a 'super' select:
DECLARE #myDate as datetime
SET #myDate = '2015-01-1'
SELECT
(select SUM(Amount)
from [Accounting].[dbo].[HandPay]
where AccountingDate>=#myDate and AccountingDate<dateadd(day,1,#myDate) ) as 'Day Total',
(select SUM(Amount)
from [Accounting].[dbo].[HandPay]
where AccountingDate>=#myDate and AccountingDate<dateadd(MONTH,1,#myDate) ) as 'Month Total',
(select SUM(Amount)
from [Accounting].[dbo].[HandPay]
where AccountingDate>=#myDate and AccountingDate<dateadd(year,1,#myDate) ) as 'Day Total'

Answer 3

One way is to write each as a sub-query with a surrounding select. I have often found this useful as it allows me to piece together the query one bit at a time. This will give you null in the column values when there is no records - which may not be what you want. Refer to #JoeFarrell's question as he has provided an example of using case to turn null into 0.
(Please excuse the strange layout, felt it was worth accentuating the ,)
DECLARE #myDate as datetime
SET #myDate = '2015-01-1'
select
(select SUM(sale_total)
from [Accounting].[dbo].[HandPay]
where AccountingDate>=#myDate and AccountingDate<dateadd(day,1,#myDate)) as 'Day Total'
,
(select SUM(sale_total)
from [Accounting].[dbo].[HandPay]
where AccountingDate>=#myDate and AccountingDate<dateadd(MONTH,1,#myDate)) as 'Month Total'
,
(select SUM(sale_total)
from [Accounting].[dbo].[HandPay]
where AccountingDate>=#myDate and AccountingDate<dateadd(year,1,#myDate)) as 'Day Total'