Question

我想根据下面给出的某些条件从下表中获取数据。

EmployeeSalary Table
------------------
EmpId Salary      
 1     76500      
 2     73500      
 3     90000      
 4     79000      
 5     35000

 GlobalData Table
 ------------------
 Name            Value
 NewIncrmeent    20000
 MaxIncrement    999999

 EmployeeDetails Table
 -----------------
 EmpId    Name    Department Expereince
  1       John    IT            6
  2       Kris    BPO           5
  3       Mark    Facilities    3
  4       Joe     Security      10

获取员工详细信息（empid，salary，name，department，expereince）的列表，其工资+ NewIncrement（需要通过列名“NewIncrement”从GlobalData表中读取，其值现在为20000）大于给定员工的工资。

例如，如果查询的输入是empid值3，那么输出应该是3个记录，其中empid为1,2,4。

我可以通过使用sql过程获得所需的数据，但我想知道我们是否可以使用sql查询获取类似的数据。我尝试了加入概念但我无法获得正确的数据。

Answer 1

像这样。

此外empid = 3的薪水为90000。 90000 + 20000 = 110000所以所有行都将从EmployeeDetails表

返回

SELECT *
FROM   EmployeeDetails ED
WHERE  EXISTS (SELECT 1
               FROM   EmployeeSalary es
               WHERE  es.EmpId = ed.EmpId
                      AND es.salary < (SELECT salary
                                              + (SELECT value
                                                 FROM   globaldate
                                                 WHERE  Name = 'NewIncrmeent')
                                       FROM   EmployeeSalary es1
                                       WHERE  es1.empid = 3))

Answer 2

SELECT e.*
  FROM employeedetails e 
  JOIN employeesalary s 
    ON s.empid = e.empid 
  JOIN globaldata g 
    ON g.name = 'newincrmeent' 
  JOIN employeesalary x 
    ON x.empid <> s.empid 
   AND x.empid = 3 
   AND x.salary < s.salary+g.value;

Answer 3

将@empID作为变量

SELECT ED.EmpID
    ,ES.Salary
    ,ES.Salary + GD.NewIncrement AS ExpectedSalary
    ,ED.Name
    ,ED.Department
    ,ED.Experience
FROM EmployeeDetails ED
INNER JOIN EmployeeSalary ES
    ON ED.EmpID = ES.EmpID
OUTER APPLY (
    SELECT Value AS NewIncrement
    FROM GlobalData
    WHERE Name = 'NewIncrement') GD
WHERE ES.Salary + GD.NewIncrement > (SELECT Salary FROM EmployeeSalary WHERE EmpID = @empID)
AND ED.EmpID != @empID

Answer 4

试试这个：

select ed.*,es.Salary from EmployeeDetails ed 
inner join EmployeeSalary es on ed.EmpId=es.EmpId 
where es.Salary < (
        select sum(p.Salary ) from
          (
            select Salary from EmployeeSalary where EmpId =3
            union all
            select Value from GlobalData where Name  ='NewIncrmeent'
          ) as p
     );

self连接一个表，其中包含来自第二个表的条件数据，并与thrid表连接以获取更多数据

4 个答案: