Sql server between 0.00 and 0.50 cannot consider 0.50 why

Question

2.00/5 (1 vote)

See more:

in sql table two rows are given below
StartWeight    EndWeight      Charges    AddWeight     AddCharges
0.00           0.50           50            0              0
0.60           1.00           100           1             70

declare @Weight decimal
set @Weight=0.5
query select Charges from table where @Weight between StartWeight and EndWeight

First Issue) is this when @Weight is less than or equal to 0.4 it show 50 and when weight is 0.50 then it show 100 while i want to show 50 on 0.5

Second Issue) same as when @weight is 0.6 to 1.4 it show 100 while i want to show 100 only between 0.60 to 1.00 not on greater than 1.00

What I have tried:

declare @weight decimal,@result decimal
set @weight=0.50
set @result=(select Charges from [Customer].[CustomerCharges] where CustomerAccountID=1 and @weight between StartWeight and EndWeight)
select @result as Result

Result=100

Posted 29-Jan-18 7:12am

Member 10028394

Updated 30-Jan-18 2:08am

Add a Solution

Comments

RedDk 29-Jan-18 13:35pm

SELECT @@MAX_PRECISION AS 'Max Precision'

"p" sets precision
"s" sets scale

decimal[(p[ ,s])]

or

numeric[(p[ ,s])]

How can anyone usg the SQL BOL not know this?

Member 10028394 29-Jan-18 15:10pm

I could not understand your answer, please give any example

Karthik_Mahalingam 30-Jan-18 2:21am

Tip: use Reply button, to post Comments/query to the user, so that the user gets notified and responds to your text.

2 solutions

Solution 1

See Precision, scale, and length (Transact-SQL) | Microsoft Docs[^]

In SQL you define the precision and scale of a numeric value in the datbase. eg numeric(18,0) means you can store a 18 digit number but with no decimals where as Numeric(18,5) will allow 5 decimal spaces. Calculations will default to the field scales unless you explicitly convert them to a different precision / scale size.

ie

cast([StartWeight] as numeric(18,5))

Posted 29-Jan-18 10:31am

RossMW

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Jörgen Andersson · Accepted Answer · 2018-01-30T02:08:00

When you declare a variable as a decimal without specifying the precision and scale it will default to decimal(18,0)
So when you in the next row set @weight=0.40 it will be rounded to a number that fits in the variable. In this case 0.

So change the first declaration to a decimal with the same size as startweight and endweight.

Like for example: declare @weight decimal(5,2),@result decimal(5,2)