﻿ SQL: List the employees who are senior to ADELYN

# SQL Exercise: List the employees who are senior to ADELYN

## SQL subqueries on employee Database: Exercise-9 with Solution

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9. From the following table, write a SQL query to find those employees who are senior to ADELYN. Return complete information about the employees.

Sample table: employees

Sample Solution:

``````SELECT *
FROM employees
WHERE hire_date <
(SELECT hire_date
FROM employees
``````

Sample Output:

``` emp_id | emp_name | job_name | manager_id | hire_date  | salary | commission | dep_id
--------+----------+----------+------------+------------+--------+------------+--------
63679 | SANDRINE | CLERK    |      69062 | 1990-12-18 | 900.00 |            |   2001
(1 row)
```

Explanation:

The said query in SQL that retrieves all employees who were hired before the employee named 'ADELYN' from the 'employees' table.

The WHERE clause in the main query filters the results to only include rows where the hire_date is earlier than the hire_date of the employee named 'ADELYN' which is obtained from the subquery .

The subquery, that selects the hire_date of the employee named 'ADELYN' from the 'employees' table.

## Practice Online

Structure of employee Database:

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Previous SQL Exercise: List the employees with the same designation as FRANK.
Next SQL Exercise: Personnel with department ID 2001 and ID 1001.

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