Question

我正在使用Microsoft SQL Server 2012，我有这个查询（如下）。它正确返回所有内容，但我无法弄清楚如何只返回第4行。

我知道如何通过一个简单的查询来完成它，但是对于这个复杂的查询，我不知道如何只返回第4行。由于我使用的是MS SQL Server，因此无法使用Limit / Offset。如何以及在何处放置代码以仅打印第4行？我很难过。感谢。

SELECT T.[First Name],
T.[Last Name],
T.[Middle Name],
T.[Country Name],
T.[Designation Name],
Salary.Emp_Salary AS 'Current Salary'
FROM
(
SELECT
    Emp_First_Name AS "First Name",
    Emp_Last_Name AS "Last Name",
    Emp_Middle_Name AS "Middle Name",
    Country_Name AS "Country Name",
    Desig_Name as "Designation Name",
    MAX(Emp_Salary_Change_Year) AS "Time"
    FROM Employee_Details

   INNER JOIN Country ON Employee_Details.Emp_Country_Id = Country.Country_Id
   INNER JOIN State ON Employee_Details.Emp_State_Id = State.State_Id
   INNER JOIN Designation ON Employee_Details.Desig_Id = Designation.Desig_Id
   INNER JOIN Salary ON Employee_Details.Emp_Id = Salary.Emp_Id

   GROUP BY Emp_First_Name, Emp_Last_Name,
   Emp_Middle_Name, Country_Name, Desig_Name) AS T
   INNER JOIN Salary ON T.Time = Salary.Emp_Salary_Change_Year
   ORDER BY [Current Salary];

Answer 1

使用带有ROW_NUMBER（）

的CTE

contact_emails = {
'Sue Reyn' : 's.reyn@email.com',
'Mike Filt': 'mike.filt@bmail.com',
'Nate Arty': 'narty042@nmail.com'
}

for email in contact_emails:
print('%s is %s' % (email, contact_emails(email)))

Answer 2

您也可以使用OFFSET / FETCH关键字。

SELECT  * 
  FROM  yourTable
 ORDER  by yourSortColumn
OFFSET  3 ROWS  -- Skip Three rows.
 FETCH  FIRST 1 ROW ONLY;

Answer 3

你可以这样使用TOP（首先你只选择4个rown，而排序desc选择1行）

 select TOP 1 from (
    SELECT  TOP 4 T.[First Name],
    T.[Last Name],
    T.[Middle Name],
    T.[Country Name],
    T.[Designation Name],
    Salary.Emp_Salary AS 'Current Salary'
    FROM
    (
    SELECT
     ........ 
      ) AS T
   INNER JOIN Salary ON T.Time = Salary.Emp_Salary_Change_Year
   ORDER BY [Current Salary]) 
    ORDER BY [Current Salary] DESC

获取第4行查询结果

3 个答案: