How can I specify precision for a column of the REAL type (eg. to three digits after the decimal point) for Group By clause?
Eg. 12.023006 is equal to 12.023007 for 3 digits precision after the decimal point and should be grouped by Group By.
A couple ways you can achieve this, one of which is to CAST your field to the appropriate precision:
select cast(somecol as decimal(10,3))
from sometable
group by cast(somecol as decimal(10,3))
SQL Fiddle Demo
You could also use the ROUND function to achieve this.
Related
I am trying to convert decimal values into non decimal number for a computed column in Oracle SQL.
Please see the below code. But I am not able to get the desired output.
Query:
Select cast(cost_account)*100/cast(amnt_fin) as "computed_LTV"
From Loan_app.
Here I Want a new column name as computed_LTV with the required calculation with no decimal in the output.
It is ROUND you're looking for, I presume.
SELECT ROUND (cost_account * 100 / amnt_fin) AS "computed_LTV" FROM Loan_app
If by "non-decimal number" you mean "integer", just use trunc():
Select trunc(cost_account * 100 / amnt_fin) as computed_LTV
From Loan_app;
I have 2 columns which I need to divide sum(cola)/sum(ColB), but I am not getting the desired results since SQL server seems to truncate values after decimal
For eg. I have-
select 281370/1035
is giving 271 using simple division, whereas actual result of division is 271.8550724637681 and I want to display 271.8
I tried
SELECT cast(round(281370/1035,1) as numeric(36,1))
but that results 271.0
In SQL Server, you have to cast the integers to decimal and you could use Round to get desired precision.
SELECT cast(Round(CAST(281370 AS decimal) / CAST(1035 AS decimal),1,1) as decimal(10,1))
The problem is that you given the int number and want a decimal result
try this
select convert(decimal(30,10),281370.0/1035.0)
or
select Round(convert(decimal(30,10),281370.0/1035.0),1,1)
#Stormcloak gives the answer to specifically wanting a single position as a mantissa, however to return an exact answer you could "simply" implicitly change the datatype.
select 281370.0/1035
Returns:
271.855072
In Presto DB:
select (CAST(11 as decimal(8,6))/CAST(7 as decimal(8,6))) as result
result:1.571429
decimal(xp,xs)
xp--> total number of digits(before decimal point+ after decimal
point)
xs--> number of digits after the decimal point
reference: https://prestodb.io/docs/current/functions/decimal.html
I have a table which includes:
COUNT RISK
35 0.6456000000
11 0.5234000000
4 0.8431000000
I need a column to multiply the two columns. However I'm getting the result of:
TOTAL
35
11
4
COUNT - INT
RISK - VARCHAR
SQL is clearly rounding up the decimals as 1. I've tried casting as decimal, numeric and multiplying by 1.0. I need to retain the decimals for an actual calculation. Any help would be great
Convert result to decimal like this
SELECT
CONVERT(DECIMAL(16,10), COUNT * RISK) AS DecimalResult
FROM dbo.whatever;
Or convert COUNT to decimal
SELECT CAST(COUNT AS DECIMAL(16,10)) * RISK
This question is really suspicious. From the surface, it seems the two columns [Count] and [Risk] have different data types with [Count] as integer and [Risk] as decimal or float.
According to BOL, decimal/float data type has higher precedence, I will quote the BOL here
When an operator combines two expressions of different data types, the rules for data type precedence specify that the data type with the lower precedence is converted to the data type with the higher precedence. If the conversion is not a supported implicit conversion, an error is returned. When both operand expressions have the same data type, the result of the operation has that data type
So to me, in SQL Server, when you do
Select [Total]=[Count]*[Risk] from [your_table]
You cannot get the result as shown in the original question.
I see that I need to return the sum of a column in Oracle for which the query I use is the following
select sum(scores) from table_x;
I want to return the results always like this
If the result is an integer, say 1000, the output should be 1000.00 (by default 2 precision digits for the fractional part)
If the result is a decimal with n digits precision, the result will should be returned as it is for example, if sum = 1000.555666, then I want the result to be 1000.555666.
The problem is when I modify the query to use cast like
select cast(sum(scores) as binary_double) from table_x
When the sum is 1000, I get the result as 1000.0, but I want one more zero in the fractional part (1000.00) since I do string comparison of results. Tried numerous solutions like casting to different data types, but can't get the integer results in the form I want.
Try:
select to_char( sum(scores), 'FM9999999999D009999' )
from table_x;
Please refer to the documentation of to_char function for details ==> click
I'm trying to convert a number to a decimal with two decimals places.
SELECT CONVERT(DECIMAL(10,2),12345)
The above would return 12345.00 but I'm trying to achieve 123.45
You need something like that:
SELECT CONVERT(DECIMAL(15,2),12345/100.0)
SELECT CONVERT(DECIMAL(10,2),CAST(12345 as float)/CAST(100 as float))
Correction: The premise is somewhat flawed, as the data type of a literal number without a decimal point is int, not numeric as implied by the question. In that case, you do need to convert the initial value to either numeric or decimal before dividing:
SELECT CONVERT(DECIMAL,12345)/100
or
SELECT CAST(12345 AS DECIMAL)/100
(cast is the SQL standard, so if you ever want to apply this to other databases, it would be the preferred method.)
Alternately, you can just add a decimal point to the divisor, as SQL server will return the more precise data type when doing arithmetic on heterogeneous types:
SELECT 12345/100.0
According to the documentation, the numeric data type is functionally equivalent to the decimal datatype, so there's really no reason to convert between the two. It seems that all you really want to do is divide the value you have by 100:
SELECT 12345/100