﻿ SQL exercises on employee Database: Display the number of employee for each job in each department - w3resource

# SQL exercises on employee Database: Display the number of employee for each job in each department

## SQL employee Database: Exercise-97 with Solution

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97. From the following table, write a SQL query to count the number of employees of each designation in each department. Return department id, job name and number of employees.

Sample table: employees

Sample Solution:

``````SELECT dep_id,
job_name,
count(*)
FROM employees
GROUP BY dep_id,
job_name;
``````

Sample Output:

``` dep_id | job_name  | count
--------+-----------+-------
3001 | MANAGER   |     1
2001 | ANALYST   |     2
3001 | SALESMAN  |     4
1001 | MANAGER   |     1
1001 | PRESIDENT |     1
2001 | MANAGER   |     1
2001 | CLERK     |     2
1001 | CLERK     |     1
3001 | CLERK     |     1
(9 rows)
```

Relational Algebra Expression:

Relational Algebra Tree:

## Practice Online

Sample Database: employee

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