What is the method for SQL to search for the top three

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The specific data and SQL are like this.

WITH Employee AS (

SELECT 1 Id, 'joe' Name,70000 SALARY,1 DepartmentId FROM DUAL UNION ALL

SELECT 2 Id, 'Henry' Name,80000 SALARY,2 DepartmentId FROM DUAL UNION ALL

SELECT 3 Id, 'Sam' Name,60000 SALARY,2 DepartmentId FROM DUAL UNION ALL

SELECT 4 Id, 'Max' Name,90000 SALARY,1 DepartmentId FROM DUAL UNION ALL

SELECT 5 Id, 'Janet' Name,69000 SALARY,1 DepartmentId FROM DUAL UNION ALL

SELECT 6 Id, 'Randy' Name,85000 SALARY,1 DepartmentId FROM DUAL

),

Department AS (

SELECT 1 Id, 'IT' Name FROM DUAL UNION ALL

SELECT 2 Id, 'Sales' Name FROM DUAL

)

SELECT T1.namename T2.*

FROM

Department T1

, Employee T2

WHERE T1.ID = T2.DepartmentId

AND 3 >

(

SELECT COUNT (distinct T3.SALARY) RN

FROM Employee T3

WHERE T2.DepartmentId = T3.DepartmentId

AND T2.SALARY < T3.SALARY

)

ORDER BY T2.DEPARTMENTID,T2.SALARY

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