Wrong calculation of values after applying the round off in SQL Server

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have three values a,b,c with datatype Decimal(15,7).

a is a summation of values b and c.

I didn't get what is wrong. What is possible way to get right result after rounding?

For example:

Declare @a decimal(15,7), 
        @b decimal(15,7), 
        @c decimal(15,7)

SET @a = '15212.82856500000'
SET @b = '15207.52909500000'
SET @c = '5.29947000000'

In above condition it returns the right result

select @a, @b + @c

But I used the round off 3 to all values it returns incorrect result.

select ROUND(@a, 3), ROUND(@b, 3) + ROUND(@c, 3)

Expected result is

ROUND(@a, 3) = ROUND(@b, 3) + ROUND(@c, 3)

You should round the result, not each variable individually:

SELECT ROUND(@a + @b + @c, 3)

SQL Server ROUND() Function, of decimal places. Tip: Also look at the FLOOR() and CEILING() functions. Required. The number to be rounded: decimals: Required. The number of decimal places to round number to: operation: Optional. If 0, it rounds the result to the number of decimal. If another value than 0, it truncates the result to the number of decimals. Default value is 0

The exact query should be

select ROUND(@a,3),ROUND(@b+@c,3)

This can gives you the desired result.

Overview of SQL Server Rounding Functions – SQL Round, Ceiling , How do you delete values after decimal point in SQL? I need to calculate 3 columns where the mid results are huge decimals, and I'm running into a problem early on with SQL Server basically rounding the decimals regardless of any cast / converts. For example, let's do a simple division as 1234/1233. A calculator will produce 1,00081103000811. But when I do this on SQL Server, we get the following:

Each time you ROUND(), you deviating from the actual by a certain percentage, however tiny. Now the more you use the ROUND(), the further away you are deviating. It is always advisable to ROUND the final output.

I'm assuming the example numbers that you gave are not the actual numbers you're having issues with ?

Remove decimal values using SQL query, (18, 0) . This will save you from replacing the ". Solution. Rounding can become misunderstood if the underlying data types and rounding functions are not understood. Depending on the data type (integer, float, decimal, etc.) the rounded value can be different. In addition, depending on the SQL Server rounding function (ROUND (), CEILING (), FLOOR ()) used in the calculation the values can differ as well.

SQL - Rounding off to 2 decimal places, How do you round to 2 decimal places in SQL? ROUND (Transact-SQL) 12/14/2017; 2 minutes to read +4; In this article. APPLIES TO: SQL Server Azure SQL Database Azure Synapse Analytics (SQL DW) Parallel Data Warehouse Returns a numeric value, rounded to the specified length or precision.

SQL Server Rounding Tips and Tricks – SQLServerCentral, )) from . The Cast function is a wrapper for the Convert function. In addition, SQL Server can calculate SUM, COUNT, AVG, etc. For these type of calculations, check out SQL Server T-SQL Aggregate Functions. To address the multiple code issues, I would recommend researching stored procedures. This tip Getting started with SQL Server stored procedures is probably a good place to start.

SQL Server Rounding Functions, Wrong calculation of values after applying the round off in SQL Server. SQL Server ROUND() Function, of decimal places. Overview of SQL Server Rounding Functions – SQL Round, Ceiling , How do you remove numbers after decimal point in SQL? SQL TRUNCATE - Truncating Numbers in SQL, returns a number rounded to a certain Hi, I am using the following query to find the top 10 transaction and percentage of transaction which is giving percentage in integer only. I tried with 100.0 in stead of 100 which is giving 16

Comments
  • Can you share your expected result and inaccurate result you are getting ?
  • when i directly calculate a and b+ c then its match,but i apply round off then it a and b+c not match
  • You have two carefully selected values. Both 15207.52909500000 and 5.29947000000 round (to three decimal places) down, but the sum of 0.00009500000 and 0.00047000000 is large enough to round up to 0.001. The unsurprising result: the sum of rounded values differs from the rounded sum of values.
  • when i directly calculate a and b+ c then its match,but i apply round off then it fives wrong result