Question

我有以下表结构也提到我的预期输出请帮我查询，因为我对SQL查询不太了解

表1：类别

Name      CatId   
 A         1   
 B         2   
 C         3

表2：Emp详细信息

FName      Id   Dob           CatId
Pratik      1   1958-04-06      2
Praveen     3   1972-05-12      1 
Nilesh      2   1990-12-12      2

到目前为止，我试图通过以下方式获得所有结果：

SELECT A.Code,A.EmpName,A.DOB,B.cname 
FROM EMPMASTER A
JOIN CATMASTER B ON A.cCode = B.ccode AND A.Compcode = B.CompCode
WHERE A.compcode = 'C0001' AND  month(A.DOB) >= 1 
      AND MONTH(A.DOB) <= 12  AND A.termflag='L' 
ORDER BY  A.DOB

但我的问题是，我还希望显示摘要结果

预期汇总输出：

Grouping           No Of Employees
 A                     1
 B                     2
 C                     0

Answer 1

我认为您可以使用LEFT JOIN，GROUP BY和COUNT，如下所示：

SELECT  [Grouping] = c.Name,
        [No Of Employees] = COUNT(e.ID)
FROM    Category AS c
        LEFT JOIN EmpDetails AS e
            ON e.CatId = c.CatId   
GROUP BY c.Name;

Answer 2

尝试这个：

 SELECT A.NAME, 
 (SELECT COUNT(*) FROM #EMP B WHERE A.CATID = B.CATID) AS COUNT  
 FROM #TEMP A

在SQL Server中显示摘要结果

2 个答案: