I want to a number like 3.5212, becomes 3.53. But using:
select Ceiling(3.5212)
it returns 4.
Can I make it always round up with two decimal places?
One way could be to multiply the value by 100 before ceiling function and then divide the final value by 100 as below.
select Ceiling(3.5212 * 100) / 100
Result:
VAL
--------
3.530000
DEMO
Related
Postgres is giving the wrong result for division when the denominator is greater than the numerator.
select 2/4 gives 0, select 4/2 works correct.
But select 2/4 should actually return 0.5
but it is returning 0 as integer
Postgres does integer division on integers. Ironically, it does not do integer averages on avg(), but that is a different matter.
One solution is simply converting one of the value to numeric:
select 2/4, 2::numeric/4
Postgres will add decimal places for numerics.
Try a floating point division, as in:
select 2.0 / 4 -- shows 0.5
Or:
select 1.0 * 2 / 4 -- shows 0.5
I'm trying to do something really quite basic to calculate a kind of percentage between two columns in Redshift. However, when I run the query with an example the result is simply zero because the decimals are not being covered.
code:
select 1701 / 84936;
Output:
I tried :
select cast(1701 / 84936 as numeric (10,10));
but the result was 0.0000000000.
How could I solve this silly thing?
It is integer division. Make sure that at least one argument is: NUMERIC(accurate data type)/FLOAT(caution: it's approximate data type):
/ division (integer division truncates the result)
select 1701.0 / 84936;
-- or
SELECT 1.0 * 1701 / 84936;
-- or
SELECT CAST(1701 AS NUMERIC(10,4))/84936;
DBFiddle Demo
When mixing data types the order counts
Note that the order of the elements in a math expression counts for the data type of the result.
Let's assume that we intend to calculate the percentage unit_sales/total_sales where both columns (or numbers) are integers.
See and try with this code here.
-- Some dummy table
drop table if exists sales;
create table sales as
select 3 as unit_sales, 9 as total_sales;
-- The calculations
select
unit_sales/total_sales*100, --> 0 (integer)
unit_sales/total_sales*100.0, --> 0.0 (float)
100.0*unit_sales/total_sales --> 33.3 (float and expected result)
from sales;
The output
0 | 0.0 | 33.33
The first column is 0 (integer) because of 3/9=0 in an integer division.
The second column is 0.0 because SQL first got the integer 0 (3/9), and later, SQL converts it to float in order to perform the multiplication by 100.0.
The expected result.
The non-integer 100.0 at the beginning of the expression force a non-integer calculation.
Here is my code
select len(cast(code as float)),code
from tbl1
where code is not null
and this is the output:
I want a count of digits in the code column.
I don't understand why the last one is counted as 12 and not 8?
Cast it as an int instead:
select len(cast(code as int)), code
from tbl1
where code is not null;
Presumably, some sort of decimal values are getting counted.
Get the number's power of 10 and add 1. This works either if ints or reals to count the number of digits of the whole number part (note using LOG10 only works on positive numbers so I have applied ABS to get around this issue, may not be required for your data):
SELECT code, CASE WHEN Number = 0 THEN 1
ELSE FLOOR(LOG10(ABS(code))) + 1 AS NDigits
FROM tbl1
I'm running SQL that needs rounding up the value to the nearest whole number.
What I need is 45.01 rounds up to 46. Also 45.49 rounds to 46. And 45.99 rounds up to 46, too. I want everything up one whole digit.
How do I achieve this in an UPDATE statement like the following?
Update product SET price=Round
You could use the ceiling function; this portion of SQL code :
select ceiling(45.01), ceiling(45.49), ceiling(45.99);
will get you "46" each time.
For your update, so, I'd say :
Update product SET price = ceiling(45.01)
BTW : On MySQL, ceil is an alias to ceiling ; not sure about other DB systems, so you might have to use one or the other, depending on the DB you are using...
Quoting the documentation :
CEILING(X)
Returns the smallest integer value not
less than X.
And the given example :
mysql> SELECT CEILING(1.23);
-> 2
mysql> SELECT CEILING(-1.23);
-> -1
Try ceiling...
SELECT Ceiling(45.01), Ceiling(45.49), Ceiling(45.99)
http://en.wikipedia.org/wiki/Floor_and_ceiling_functions
For MS SQL CEILING(your number) will round it up.
FLOOR(your number) will round it down
Combine round and ceiling to get a proper round up.
select ceiling(round(984.375000), 0)) => 984
while
select round(984.375000, 0) => 984.000000
and
select ceil (984.375000) => 985
Ceiling is the command you want to use.
Unlike Round, Ceiling only takes one parameter (the value you wish to round up), therefore if you want to round to a decimal place, you will need to multiply the number by that many decimal places first and divide afterwards.
Example.
I want to round up 1.2345 to 2 decimal places.
CEILING(1.2345*100)/100 AS Cost
If you want to round off then use the round function. Use ceiling function when you want to get the smallest integer just greater than your argument.
For ex: select round(843.4923423423,0) from dual gives you 843 and
select round(843.6923423423,0) from
dual gives you 844
This depends on the database server, but it is often called something like CEIL or CEILING. For example, in MySQL...
mysql> select ceil(10.5);
+------------+
| ceil(10.5) |
+------------+
| 11 |
+------------+
You can then do UPDATE PRODUCT SET price=CEIL(some_other_field);
How can i convert this to a decimal in SQL? Below is the equation and i get the answer as 78 (integer) but the real answer is 78.6 (with a decimal) so i need to show this as otherwise the report won't tally up to 100%
(100 * [TotalVisit1]/[TotalVisits]) AS Visit1percent
Try This:
(100.0 * [TotalVisit1]/[TotalVisits]) AS Visit1percent
convert(decimal(5,2),(100 * convert(float,[TotalVisit1])/convert(float,[TotalVisits]))) AS Visit1percent
Ugly, but it works.
CAST(ROUND([TotalVisit1]*100.0/[TotalVisits],2)as decimal(5,2)) as Percentage
Not ugly and work better and fast , enjoy it!
At least in MySQL (if it helps), if you want to use float numbers you had to use a type float field, not the regular int fields.
Just add a decimal to the 100
(100.0 * [TotalVisit1]/[TotalVisits]) AS Visit1percent
this forces all processing to happen in floats... if you want the final output as text, and truncated for display to only one decimal place, use Str function
Str( 100.0 * [TotalVisit1]/[TotalVisits], 4, 1 ) AS Visit1percent
This works perfectly for me:
CAST((1.0 * SUM(ColumnA) /COUNT(ColumnB)) as decimal(5,2))
Hope it helps someone out there in the world.
Its probably overkill to do this, but you may wish to consider casting all values to floats to ensure accuracy at all phases.
(100.0 * ( [TotalVisit1]+0.0 )/([TotalVisits]+0.0) ) as Visit1percent
Note, you really need to put code in here for the case that TotalVisits == 0 or you will get a division by 0 answer.
SELECT(ROUND(CAST(TotalVisit1 AS DECIMAL)/TotalVisits,1)) AS 'Visit1percent'
This will return a decimal and the ROUND will round it to one digit. So in your case you would get 76.6. If you don't want any digits change the 1 to 0 and if you want two digits change it to 2.
Try with this, no round and str or Over(). i found this as a simpler way to do it.
cast((count(TotalVisit1) * 100.0) /TotalVisits as numeric(5,3)) as [Visit1percent]
You can change the number of decimal points as you wish to
e.g. numeric(5,2) or numeric(5,4)
This might not address you issue directly, but when you round a set of numbers for display you're never guaranteed to get numbers that add to 100 unless you take special precautions. For example, rounding 33.33333, 33.33333 and 33.33333 is going to leave you one short on the sum, so the logical thing to do is to modify the percentage for the largest value in the set to take account of any difference.
Here's a way of doing that in Oracle SQL using analytic functions and a subquery factoring (WITH) clause to generate sample data.
with data as (select 25 num from dual union all
select 25 from dual union all
select 25 from dual)
select num,
case
when rnk = 1
then 100 - sum(pct) over (order by rnk desc
rows between unbounded preceding
and 1 preceding)
else pct
end pct
from
(
select num,
round(100*ratio_to_report(num) over ()) pct,
row_number() over (order by num desc) rnk
from data
)
/
NUM PCT
---------------------- ----------------------
25 33
25 33
25 34
In ms Access You can use the SQL function ROUND(number, number of decimals), It will round the number to the given number of decimals:
ROUND((100 * [TotalVisit1]/[TotalVisits]),1) AS Visit1percent