Question

您好，我试图回答这个问题＆＃39;我们的评估系统是否有助于培养员工。＆＃39;目前我推荐的两个表是评估和员工，其中每个表都有评估分数（评估），promotion_last_5years（0/1）（员工）和满意度（员工）。到目前为止，我有三个查询

4个评估分数中的员工输出数
每个职位的员工平均满意度
每个括号中提升的输出计数

1）

SELECT e.range AS [0-1], count(*) AS [Number of Employees]
FROM 
(
  SELECT (CASE WHEN score BETWEEN 0 AND 0.25 THEN '0-0.25'
               WHEN score BETWEEN 0.25 AND 0.5 THEN '0.25-0.5'
               WHEN score BETWEEN 0.5 AND 0.75 THEN '0.5-0.75'
               WHEN score BETWEEN 0.75 AND 1 THEN '0.75-1'
          END) as range
  FROM Evaluation
) e
GROUP BY e.range;

2）

SELECT AVG(satisfaction)
FROM Employee
WHERE score IN (SELECT score FROM Evaluation WHERE score>0 AND score<0.25);

3）

SELECT promotion_last_5years, count(*) AS Proportion_promoted
FROM Employee
WHERE score IN (SELECT score FROM Evaluation WHERE score>0 AND score<0.25)
GROUP BY promotion_last_5years;

OR

SELECT TotPromoted/TotalNotPromoted
FROM 
(
    SELECT count(*) AS TotPromoted 
    FROM Employee 
    WHERE promotion_last_5years='1' AND score IN 
    (
        SELECT score FROM Evaluations WHERE score>0 AND score<0.25
    );
),

(SELECT count(*) AS TotalNotPromoted 
FROM Employee 
WHERE promotion_last_5years='0' AND score IN (SELECT score FROM Evaluations WHERE score>0 AND score<0.25);)

依此类推剩余范围

我问你有没有办法将这些查询中的数据合并到一个表中？如果是这样，请启发我，因为我是一个SQL初学者。此外，我对任何其他关于如何回答这个问题的建议持开放态度。提前谢谢！

组合范围内两个表的数据 - SQL

0 个答案: