SQL Exercise: Employees retiring after 31-Dec-99 after 8 years
SQL employee Database: Exercise-30 with Solution
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30. From the following table, write a SQL query to identify those employees who retired after 31-Dec-99, completing eight years of service. Return employee name.
Sample table: employees
Pictorial Presentation:

Sample Solution:
SELECT emp_name
FROM employees
WHERE hire_date + interval '96 months' > '1999-12-31';
Sample Output:
emp_name -------------- ADNRES MARKER SCARLET (3 rows)
Explanation:
The said query in SQL that selects the "emp_name" column from the "employees" table who were hired after December 31st, 1999.
The WHER clause filters the result set for the "hire_date" column plus 96 months (or 8 years) is greater than December 31st, 1999.
Practice Online
Sample Database: employee

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Previous SQL Exercise: Employees who earn more than 100 as daily salary.
Next SQL Exercise: List those employees whose salary is an odd value.
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SQL: Tips of the Day
Concatenate strings of a string field in a PostgreSQL 'group by' query:
Input:
ID COMPANY_ID EMPLOYEE 1 1 Anna 2 1 Bill 3 2 Carol 4 2 Dave
SELECT company_id, string_agg(employee, ', ') FROM mytable GROUP BY company_id;
Output:
COMPANY_ID EMPLOYEE 1 Anna, Bill 2 Carol, Dave
Database: PostgreSQL
Ref: https://bit.ly/2XTiRjq
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