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cardilionFlag for United States of America

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Sum Columns WHERE?

I need some help creating a query that pulls all the projects from my projects table,
then Sums all the bills charged to that project this week, & then sums all the bills charged to that project.  

here is picture of a simplified diagram showing what i need.

 Also I am using php 5.5, MYSQL 5.1, and adobe flash builder 4.

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max-hb
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This can easily be done using sub querys.
select
	projID,
	ProjName,
	(
		select count(*) from transactions T1
		where
		T1.projID = P.projID
	) as NumOfTransActions,
	(
		select sum(amount) from transactions T2
		where
		T2.projID = P.projID
		and
		(year(T2.timestamp) = year(Now())
		and
		(month(T2.timestamp) = month(Now())
		and
		(week(T2.timestamp) = week(Now())
	) as TransWeekly,
	(
		select sum(amount) from transactions T3
		where
		T3.projID = P.projID
	) as TransTotal
from projects P

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you don't need subqueries there, try the below
select
	p.projID,
	p.ProjName,
	count(*) as CountofTransactions,
	sum(case when t.timestamp between now()-dayofweek(now())+1 and
					   now()+(7-dayofweek(now()))	
		then t.amount else 0 end
             ) as Transweekly,

	sum(t.amount) as transtotal
from projects P
inner join Transactions t on p.projid = t.projid
group by p.Projid, p.projName

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SOLUTION
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ralmada
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ASKER

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'as TransWeekly, ( select sum(amount) from transactions where transact' at line 19

I get this error when testing
The total sum works and the count works, I am having trouble getting the weekly sum
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Both worked so i split the points to both of ya'll.  Thank yall for the help, once again experts-exchange saves the day