SQL Exercise: Employees who was hired during given dates

Last update on March 31 2023 06:07:13 (UTC/GMT +8 hours)

SQL SORTING and FILTERING on HR Database: Exercise-12 with Solution

12. From the following table, write a SQL query to find those employees who were hired between November 5th, 2007 and July 5th, 2009. Return full name (first and last), job id and hire date.

Sample table : employees

Sample Solution:

SELECT first_name ||' '||last_name AS Full_Name, 
  job_id, hire_date 
   FROM employees 
    WHERE hire_date 
     BETWEEN '2007-11-05' AND '2009-07-05';

Sample Output:

    full_name     |   job_id   | hire_date
------------------+------------+------------
 Luis Popp        | FI_ACCOUNT | 2007-12-07
 Kevin Mourgos    | ST_MAN     | 2007-11-16
 Steven Markle    | ST_CLERK   | 2008-03-08
 Ki Gee           | ST_CLERK   | 2007-12-12
 Hazel Philtanker | ST_CLERK   | 2008-02-06
 Eleni Zlotkey    | SA_MAN     | 2008-01-29
 Oliver Tuvault   | SA_REP     | 2007-11-23
 Mattea Marvins   | SA_REP     | 2008-01-24
 David Lee        | SA_REP     | 2008-02-23
 Sundar Ande      | SA_REP     | 2008-03-24
 Amit Banda       | SA_REP     | 2008-04-21
 Sundita Kumar    | SA_REP     | 2008-04-21
 Charles Johnson  | SA_REP     | 2008-01-04
 Girard Geoni     | SH_CLERK   | 2008-02-03
 Randall Perkins  | SH_CLERK   | 2007-12-19
 Douglas Grant    | SH_CLERK   | 2008-01-13
(16 rows)

Code Explanation:

The said query in SQL that retrieves the first name, last name concatenated as "Full_Name", job_id, and hire_date columns from the 'employees' table where the hire_date is between November 5th, 2007 and July 5th, 2009.

Practice Online

Query Visualization:

Duration:

Rows:

Query visualization of Display the full name, job id and date of hire for those employees who was hired during November 5th, 2007 and July 5th, 2009 - Rows

Cost:

Query visualization of Display the full name, job id and date of hire for those employees who was hired during November 5th, 2007 and July 5th, 2009 - Cost

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Previous SQL Exercise: Employees whose salary is out of a given range.
Next SQL Exercise: Find employees who works either in department 70 or 90.

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SQL: Tips of the Day

Difference between natural join and inner join

One significant difference between INNER JOIN and NATURAL JOIN is the number of columns returned-

Consider:

TableA                           TableB
+------------+----------+        +--------------------+    
|Column1     | Column2  |        |Column1  |  Column3 |
+-----------------------+        +--------------------+
| 1          |  2       |        | 1       |   3      |
+------------+----------+        +---------+----------+

The INNER JOIN of TableA and TableB on Column1 will return

SELECT * FROM TableA AS a INNER JOIN TableB AS b USING (Column1);
SELECT * FROM TableA AS a INNER JOIN TableB AS b ON a.Column1 = b.Column1;

+------------+-----------+---------------------+    
| a.Column1  | a.Column2 | b.Column1| b.Column3|
+------------------------+---------------------+
| 1          |  2        | 1        |   3      |
+------------+-----------+----------+----------+

The NATURAL JOIN of TableA and TableB on Column1 will return:

SELECT * FROM TableA NATURAL JOIN TableB
+------------+----------+----------+    
|Column1     | Column2  | Column3  |
+-----------------------+----------+
| 1          |  2       |   3      |
+------------+----------+----------+

Ref: https://bit.ly/3AG5CId

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