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Posted by Alex on 03/10/07 19:37
Hey everyone,
I'm working on a project that will let the users store their budget,
and in the backbone I have a MySQL database. However, I'm not really
fluent in SQL. I have two questions:
The first is a request for a suggestion of a SQL query. I have a table
that contains all user entries in the following format:
id member_id date amount
1 1 070210 2.3
2 1 070210 4.3
3 2 070211 5.8
4 2 070212 1.6
5 1 070213 3.2
In order to sum up the total amount for a specific member, I use the
the following query:
SELECT SUM(amount) as amount FROM budget WHERE member_id=1
Now how do I solve this if I'd like to limit the SUM to count the
amount in entries between specific id's? The reason for this is that I
have a table that shows every member's expenses. The number of rows
can be set by the member and is taken care of with a LIMIT command in
that function, but the same method isn't working in this query. Any
ideas of how to solve this?
Then I have a "follow-up" question. When I use the SUM function on the
amounts above, I end up with a number with loads of decimals when I'd
only like one. Right now I'm solving this with a ROUND command. The
types of the column is FLOAT. Any ideas?
Thanks a lot in advance.
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