Sql truncate decimal without rouding

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how do we get decimal 2 places without rounding in sql
for simple calculation,
(3990-460)/95 = 35.2 but sql give 36.
how do i do it?

What I have tried:

tried round, floor. it not works

Posted 22-Jan-20 20:58pm

octavia81

Updated 5-Feb-20 20:11pm

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Herman<T>.Instance 23-Jan-20 5:05am

Which type of database?

4 solutions

Solution 1

Quote:
(3990-460)/95 = 35.2

Please note, the result of (3990-460)/95 is 37,15789...

Anyway, depending on your actual SQL platform, might be a TRUNCATE or TRUNC function is available (see, for instance Oracle's TRUNC (number)[^]).

Posted 22-Jan-20 21:18pm

CPallini

Solution 3

If you use SQL Server.

SQL

SELECT FORMAT((3990-460)/CAST(95 as Decimal), 'N2');

Posted 22-Jan-20 23:11pm

Herman<T>.Instance

Updated 22-Jan-20 23:12pm

v2

Comments

Jörgen Andersson 23-Jan-20 9:20am

I wouldn't use FORMAT as it changes the type to a string.
Better use Round((3990-460)/CAST(95 as Decimal),2,1) or CAST((3990-460)/CAST(95 as Decimal) AS Decimal(7,2))

Solution 4

Thanks all. one thing to take note for those facing issue like me is your DB table data type and SP data type must be matched. :)

Posted 5-Feb-20 20:11pm

octavia81

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OriginalGriff · Accepted Answer · 2020-01-22T21:40:00

It's almost certainly a integer / conversion problem: if I use DECIMAL values throughout, I get what I expect.

SQL

DECLARE @A DECIMAL(7,2) = 3990
DECLARE @B DECIMAL(7,2) = 460
DECLARE @C DECIMAL(7,2) = 95
DECLARE @VAL DECIMAL(7,2) = (@A - @B) / @C

DECLARE @IA INTEGER = 3990
DECLARE @IB INTEGER = 460
DECLARE @IC INTEGER = 95
DECLARE @IVAL DECIMAL(7,2) = (@IA - @IB) / @IC
SELECT (@A - @B) /  @C, (@IA - @IB) /  @IC, @VAL, @IVAL, (3990 - 460) / 95

(No column name)  (No column name)  (No column name)  (No column name) 
 (No column name)
37.1578947368     37                37.16             37.00             37

So check your value types! At a guess, you are using the wrong column type, but we can't check your DB - we don;t have any access to it.