sql 获得Median和Std Dev。在9月1日之后完成的评估数据（截止日期计算为年度）。 （我们不希望任何非年度

Posted 2021-05-13

SELECT YEAR,
  TITLE,
  MEDIAN(OVRLLRTNG)          AS MED_SCORE,
  ROUND(STDDEV(OVRLLRTNG),2) AS STD_DEV,
  COUNT(TITLE)               AS EVAL_COUNT
FROM EVAL_EMPL_PR
WHERE EVAL_STATUS = 'Finalized'
AND EMPL_DS_DT   IS NOT NULL
AND YEAR LIKE '2015%'
AND YEAR NOT LIKE '%COMPDEV%'
AND EMPL_DS_DT >= '01-SEP-2015'
GROUP BY TITLE,
  YEAR
ORDER BY MED_SCORE DESC;