SQL Subquery Exercises: Find out the names of all employees whose salary is greater than 50% of their department's total salary bill
SQL SUBQUERY: Exercise-31 with Solution
From the following tables, write a SQL query to find those employees whose salaries exceed 50% of their department's total salary bill. Return first name, last name.
Sample table: employees
Sample Solution:
SELECT e1.first_name, e1.last_name
FROM employees e1
WHERE salary >
( SELECT (SUM(salary))*.5
FROM employees e2
WHERE e1.department_id=e2.department_id);
Sample Output:
first_name last_name Kimberely Grant Jennifer Whalen Michael Hartstein Susan Mavris Hermann Baer Shelley Higgins
Pictorial Presentation:

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Query Visualization:
Duration:

Rows:

Cost:

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Previous: From the following tables, write a SQL query to find those employees who work under a manager based in ‘US’. Return first name, last name.
Next: From the following tables, write a SQL query to find those employees who are managers. Return all the fields of employees table.
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SQL: Tips of the Day
How to count occurrences of a column value in SQL?
Input table:
id | age -------- 0 | 25 1 | 25 2 | 23
SELECT age, count(age) FROM Students GROUP by age
Output:
id | age | count ---------------- 0 | 25 | 2 1 | 25 | 2 2 | 23 | 1
Ref: https://bit.ly/3zbLPQm
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