SQL SELECT FETCH AND ROWNUM

Write SQL select FETCH queries.

The SELECT FETCH and ROWNUM clause is used to specify the number of records to return

Example

Table: Employee                            
+----+-------+--------+--------------+     
| Id | Name  | Salary | DepartmentId |     
+----+-------+--------+--------------+   
| 1  | Ram   | 85000  | 1            |   
| 2  | Henry | 80000  | 2            |   
| 3  | Sam   | 60000  | 2            |   
| 4  | Shyam | 60000  | 1            |
| 5  | Geeta | 90000  | 1            |
| 6  | Sheet | 90000  | 1            |
| 7  | Leela | 80000  | 1            |
| 8  | Geeta | 70000  | 1            |
+----+-------+--------+--------------+

Approach

Oracle: SELECT TWO 2 records

SELECT * FROM Employee FETCH FIRST 2 ROWS ONLY;

Result:

+----+-------+--------+--------------+     
| Id | Name  | Salary | DepartmentId |     
+----+-------+--------+--------------+   
| 1  | Ram   | 85000  | 1            |   
| 2  | Henry | 80000  | 2            |
+----+-------+--------+--------------+

Oracle: SELECT 2 records with WHERE condition

SELECT  * FROM Employee WHERE DepartmentID=1 AND ROWNUM <=2;

Result:

+----+-------+--------+--------------+     
| Id | Name  | Salary | DepartmentId |     
+----+-------+--------+--------------+   
| 1  | Ram   | 85000  | 1            |   
| 4  | Shyam | 60000  | 1            |
+----+-------+--------+--------------+