SQL Exercise: Employees who joined on the given days in the year 1991

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45. From the following table, write a SQL query to identify all employees who joined the company on 1st May, 20th February, and 3rd December 1991. Return complete information about the employees.

Sample table: employees

Pictorial Presentation:

Sample Solution:

SELECT *
FROM employees
WHERE to_char(hire_date,'DD-MON-YY') IN ('01-MAY-91',
                                         '20-FEB-91',
                                         '03-DEC-91');

Sample Output:

emp_id |emp_name |job_name |manager_id |hire_date  |salary  |commission |dep_id |
-------|---------|---------|-----------|-----------|--------|-----------|-------|
66928  |BLAZE    |MANAGER  |68319      |1991-05-01 |2750.00 |           |3001   |
64989  |ADELYN   |SALESMAN |66928      |1991-02-20 |1700.00 |400.00     |3001   |
69000  |JULIUS   |CLERK    |66928      |1991-12-03 |1050.00 |           |3001   |
69062  |FRANK    |ANALYST  |65646      |1991-12-03 |3100.00 |           |2001   |

Explanation:

The said query in SQL that selects all columns and rows from the 'employees' table where the hire_date column, after being formatted as a string with the 'DD-MON-YY' format, matches one of the specified strings '01-MAY-91', '20-FEB-91', or '03-DEC-91'.

Within "IN" operator, the WHERE clause includes employees hired on May 1st, 1991, February 20th, 1991, or December 3rd, 1991.

The "to_char" function converts the hire_date column into a string with the format, 'DD-MON-YY'.

Practice Online

Sample Database: employee

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