microsoft.public.sqlserver.newusers Google Group

Re: DOUBLE v DECIMAL

rick...@microsoft.com (Rick Byham, MSFT) — Thu, 03 Dec 2009 16:20:09 UT

My only quibble, is that you again describe the money math as an error. It's
not an error. It's following an accounting rule.

Re: DOUBLE v DECIMAL

tomcoo...@comcast.net (Tom Cooper) — Thu, 03 Dec 2009 05:14:29 UT

Yes, I agree. If you are concerned about keeping 4 digits to the right of
the decimal, you should not use decimal(9,2). You would, of course, use
decimal(x,4) where x was the value that gave you the required number of
digits to the right of the decimal. For example, if you needed 7 digits to
the left of the decimal, you could use decimal(11,4).

Re: DOUBLE v DECIMAL

rick...@microsoft.com (Rick Byham, MSFT) — Wed, 02 Dec 2009 23:24:14 UT

Let's make a slight change to your example.
declare @m money
declare @d decimal(9,2)
set @m = 234.56
set @d = 234.56
select cast((@m/1000) As money) AS UsingMoney
select cast((@d/1000) As decimal(9,2)) AS UsingDecimal
Result:
UsingMoney
0.2345
UsingDecimal
0.23
You just walked away with 0.0045 dollars. Run this transaction a million

Re: DOUBLE v DECIMAL

tomcoo...@comcast.net (Tom Cooper) — Wed, 02 Dec 2009 20:19:06 UT

I would avoid using the money datatype. Not only is it proprietary to
Microsoft where decimal is ANSI standard. Money datatype has calculation
problems. Try running
declare @m money
declare @d decimal(9,2)
set @m = 234.56
set @d = 234.56
select cast((@m/1000)*1000 As money)
select cast((@d/1000)*1000 As decimal(9,2))

Re: DOUBLE v DECIMAL

rick...@microsoft.com (Rick Byham, MSFT) — Wed, 02 Dec 2009 17:55:22 UT

Also consider using money. It only has 4 digits to the right of the decimal,
but it conforms to the "generally accepted accounting principles" for
handling money. But if you have special needs, by all means use numeric.

Re: DOUBLE v DECIMAL

russellfie...@nomail.com (Russell Fields) — Tue, 01 Dec 2009 23:08:11 UT

Andy
DOUBLE is a floating point number and is, therefore, not precise. Use
DECIMAL (or NUMERIC). For example, you might use:
DECIMAL (19,6) which has 14 digits before the decimal and 6 digits
afterward and is stored in 9 bytes.
Read about DECIMAL and storage considerations:
[link]

Re: sql server tutorial

nos...@thanks.com (mp) — Tue, 01 Dec 2009 23:00:59 UT

Right, it's supposed to be the express version., I dled it again and
installed again, and again "nothing happens"
meaning...no shortcuts created, no entries under start | all programs, no
submenu under sql Server menu under All Programs, no folders i can see
getting created under sql folders
At this point I'm giving up on sql server and going back to sql lite.

DOUBLE v DECIMAL

a...@trezise.f2s.com (Andy Trezise) — Tue, 01 Dec 2009 22:33:46 UT

I'm pretty new to SQL and am a little confused as to which field type I
should use to store my 'currency' type data.
What's the main difference between these two data types and which would best
fit the purpose?
I want to store signed numerical data with up to 6 decimal places.
Thanks in advance for any help.

Re: sql server tutorial

esq...@sommarskog.se (Erland Sommarskog) — Mon, 30 Nov 2009 22:38:46 UT

Yes, that is SQL 2008. The internal version number is 10.
That seems to be the Express version. The real SSMS is not available for
download from Microsoft.

Re: sql server tutorial

nos...@thanks.com (mp) — Mon, 30 Nov 2009 00:29:00 UT

Now i think that's wrong, I may have installed it from the website...
[link]
I've done so many things trying to figure this out I've forgotten all the
steps i've been through....
snip

Re: sql server tutorial

nos...@thanks.com (mp) — Sun, 29 Nov 2009 22:44:19 UT

Like I said, this may all be moot as it seems it's beyond my ability to
understand and learn, and for now I just need to do extensive reading of all
the sites Ive saved over the past week of searching. but since you ask,
here's what I remember of what I tried to install
I'm guessing the sql server version is 2008 due to seeing folder in

Re: sql server tutorial

esq...@sommarskog.se (Erland Sommarskog) — Sun, 29 Nov 2009 15:43:20 UT

Express is an edition. But is it SQL 2005 or SQL 2008?
And you said that you tried install the non-Express version of
SQL Server Mangement Studio? Then you must at least have gotten that
from another edition.

Re: sql server tutorial

nos...@thanks.com (mp) — Sun, 29 Nov 2009 14:17:47 UT

sorry, i thought i'd mentioned somewhere up thread that i was dealing with
the express versions
I've gotten the books online and have gotten a lot of good background info
from everyone here, thank you all
will spend some time reading now, at this point it looks like this is all
well over my head and probably

Re: sql server as file server os?

nos...@thanks.com (mp) — Sun, 29 Nov 2009 14:07:50 UT

not you,... the person at work who i asked what os the server was running.
they replied sql server, that's what confused me originally
mark

Re: sql server as file server os?

u...@iscar.co.il (Uri Dimant) — Sun, 29 Nov 2009 13:29:59 UT

mp
Where do I say that os running by SQL?