﻿ SQL: List the employees who joined before 1991

# SQL Exercise: List the employees who joined before 1991

## SQL employee Database: Exercise-12 with Solution

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12. From the following table, write a SQL query to find those employees who joined before 1991. Return complete information about the employees.

Sample table: employees

Pictorial Presentation:

Sample Solution:

``````SELECT *
FROM employees
WHERE hire_date<('1991-1-1');
``````

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 selects all columns from the 'employees' table where the hire_date is before January 1, 1991.

The "WHERE" clause filters the results for all employees whose hire date is earlier than January 1, 1991.

Relational Algebra Expression:

Relational Algebra Tree:

## Practice Online

Sample Database: employee

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Previous SQL Exercise: List the employees not in department 2001.
Next SQL Exercise: Average salaries of the employees works as ANALYST.

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