Oracle STDDEV函数

Posted 2021-02-22

A few examples of the STDDEV function.

SELECT STDDEV(fees_required)
FROM student;
 
SELECT STDDEV(DISTINCT fees_required)
FROM student;
 
SELECT
enrolment_date,
TO_CHAR(enrolment_date, 'MON') AS enrolment_mth,
STDDEV(fees_required) OVER (ORDER BY TO_CHAR(enrolment_date, 'MON')) AS stdev_val
FROM student;