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Actually I'm looking for more details about the sum function in Apache Hive. Until now, I understood that I can specify the number of digits after the dot:
val DECIMAL(18, 3)
But what I can not find is the precision scale in case of sum. If I add 2 decimals with a precision scale of 3 for example, what will be the return of the sum function? My precision scale will be preserved? The result will be truncated or rounded? What have I missed?
Thanks a lot.
525
format("%. 2f", 1.23456); This will format the floating point number 1.23456 up-to 2 decimal places, because we have used two after decimal point in formatting instruction %.
Use the toFixed() method to round a number to 2 decimal places, e.g. const result = num. toFixed(2) . The toFixed method will round and format the number to 2 decimal places.
Round 3.863 off to 2 decimal places. 2 decimal places means that the answer needs to have 2 numbers after the decimal point. Let’s highlight all the numbers up to 2 numbers after the decimal point: Now all you need to do next is look at the number after the 6 to decide if you round the number down (keep it the same as 3.86) or up (round to 3.87).
Round 14.816 off to 2 decimal places. 2 decimal places means that the answer needs to have 2 numbers after the decimal point. Let’s highlight all the numbers up to 2 numbers after the decimal point: 14.81 6
2 decimal places means that the answer needs to have 2 numbers after the decimal point. Let’s highlight all the numbers up to 2 numbers after the decimal point: Now all you need to do next is look at the number after the 0 to decide if you round the number down (keep it the same as 174.80) or up (round to 174.81).
Now, look at the digit on the right side of the place value you wanted to round to i.e. thousandths place. In this case, it is 8 Since 8 > 5 we will round up and increase the hundredths place by 1 i.e. 5+1 =6. Ignore the remaining digits in the decimal number.
Just round it to as many decimal places as you want.
select round(SUM(150.100 + 127.0090), 2);
Output of above will be:-
277.11
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