我有这个问题:
SELECT C.[First Name],
C.[Last Name],
SUM(Salary.Emp_Salary) AS 'Current Salary'
FROM
(
SELECT
Emp_First_Name AS "First Name",
Emp_Last_Name AS "Last Name",
MAX(Emp_Salary_Change_Year) AS "Change Year"
FROM Employee_Details AS e
INNER JOIN Country AS co ON e.Emp_Country_Id = co.Country_Id
INNER JOIN State AS s ON e.Emp_State_Id = s.State_Id
INNER JOIN Designation AS d ON e.Desig_Id = d.Desig_Id
INNER JOIN Salary AS sa ON e.Emp_Id = sa.Emp_Id
WHERE Emp_Active = 1
GROUP BY Emp_First_Name, Emp_Last_Name,
Emp_Middle_Name, Country_Name, Desig_Name) AS C
INNER JOIN Salary ON C.[Change Year] = Salary.Emp_Salary_Change_Year
group by C.[First Name],
C.[Last Name];
返回:
First Name Last Name Current Salary
Chen Chen 76000.00
Sahi King 156000.00
Venessa Katarina 185000.00
如何在此查询中使用CTE? 我知道使用WITH子句,但由于查询很复杂,我无法使用它。我正在使用它作为参考:http://www.codeproject.com/Articles/265371/Common-Table-Expressions-CTE-in-SQL-SERVER 但它只包含简单的例子。
感谢。
答案 0 :(得分:1)
很简单;忽略了语法。
WITH T([First Name], [Last Name], [Current Salary])
AS
(
SELECT C.[First Name],
C.[Last Name],
SUM(Salary.Emp_Salary) AS 'Current Salary'
FROM
(
SELECT
Emp_First_Name AS "First Name",
Emp_Last_Name AS "Last Name",
MAX(Emp_Salary_Change_Year) AS "Change Year"
FROM Employee_Details AS e
INNER JOIN Country AS co ON e.Emp_Country_Id = co.Country_Id
INNER JOIN State AS s ON e.Emp_State_Id = s.State_Id
INNER JOIN Designation AS d ON e.Desig_Id = d.Desig_Id
INNER JOIN Salary AS sa ON e.Emp_Id = sa.Emp_Id
WHERE Emp_Active = 1
GROUP BY Emp_First_Name, Emp_Last_Name,
Emp_Middle_Name, Country_Name, Desig_Name) AS C
INNER JOIN Salary ON C.[Change Year] = Salary.Emp_Salary_Change_Year
group by C.[First Name],
C.[Last Name]
)
SELECT * FROM T;
答案 1 :(得分:0)
这取决于你想要休息的地方。通常可以将内联视图创建为CTE以使查询更易于阅读...在这种情况下,我删除了您的线条视图并使其成为CTE。
$query = "SELECT [Distinct Nazwa] FROM vDane ";
$query = "SELECT `Distinct Nazwa` FROM vDane ";
答案 2 :(得分:0)
这取决于你想要休息的地方。通常可以将内联视图创建为CTE以使查询更易于阅读...在这种情况下,我删除了您的线条视图并使其成为CTE。
With C as (
(
SELECT
Emp_First_Name AS "First Name",
Emp_Last_Name AS "Last Name",
MAX(Emp_Salary_Change_Year) AS "Change Year"
FROM Employee_Details AS e
INNER JOIN Country AS co ON e.Emp_Country_Id = co.Country_Id
INNER JOIN State AS s ON e.Emp_State_Id = s.State_Id
INNER JOIN Designation AS d ON e.Desig_Id = d.Desig_Id
INNER JOIN Salary AS sa ON e.Emp_Id = sa.Emp_Id
WHERE Emp_Active = 1
GROUP BY Emp_First_Name, Emp_Last_Name,
Emp_Middle_Name, Country_Name, Desig_Name)
SELECT C.[First Name]
, C.[Last Name],
SUM(Salary.Emp_Salary) AS 'Current Salary'
FROM C
INNER JOIN Salary
ON C.[Change Year] = Salary.Emp_Salary_Change_Year
GROUP BY C.[First Name]
,C.[Last Name];
或者你可以建立在ctes ...
With C as (
(
SELECT
Emp_First_Name AS "First Name",
Emp_Last_Name AS "Last Name",
MAX(Emp_Salary_Change_Year) AS "Change Year"
FROM Employee_Details AS e
INNER JOIN Country AS co ON e.Emp_Country_Id = co.Country_Id
INNER JOIN State AS s ON e.Emp_State_Id = s.State_Id
INNER JOIN Designation AS d ON e.Desig_Id = d.Desig_Id
INNER JOIN Salary AS sa ON e.Emp_Id = sa.Emp_Id
WHERE Emp_Active = 1
GROUP BY Emp_First_Name, Emp_Last_Name,
Emp_Middle_Name, Country_Name, Desig_Name),
CTE2 as (
SELECT C.[First Name]
, C.[Last Name],
SUM(Salary.Emp_Salary) AS 'Current Salary'
FROM C
INNER JOIN Salary
ON C.[Change Year] = Salary.Emp_Salary_Change_Year
GROUP BY C.[First Name]
,C.[Last Name])
SELECT *
FROM CTE2;